diff --git a/CHANGELOG.md b/CHANGELOG.md
index 45529a7d..e7e91243 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,13 @@
+v3.1.12 - Mon, 05 Feb 2018 08:34:57 UTC
+---------------------------------------
+
+- [6c4d4ad](../../commit/6c4d4ad) [fixed] management of aria-hidden attribute decoupled from the management of the body open class
+- [93b2c05](../../commit/93b2c05) [chore] Bump bootstrap example to use 4.0 release
+- [0bd1505](../../commit/0bd1505) [chore] edits style doc
+- [c7c928c](../../commit/c7c928c) [chore] updates style page
+- [f5b9c11](../../commit/f5b9c11) [chore] updates README - styles
+
+
 v3.1.11 - Tue, 16 Jan 2018 12:45:05 UTC
 ---------------------------------------
 
diff --git a/bower.json b/bower.json
index f9d9d9bd..058a0344 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "react-modal",
-  "version": "3.1.11",
+  "version": "3.1.12",
   "homepage": "https://github.com/reactjs/react-modal",
   "authors": [
     "Ryan Florence",
diff --git a/dist/react-modal.js b/dist/react-modal.js
index 5bb870ad..63dc604b 100644
--- a/dist/react-modal.js
+++ b/dist/react-modal.js
@@ -7,7 +7,7 @@
 		exports["ReactModal"] = factory(require("react"), require("react-dom"));
 	else
 		root["ReactModal"] = factory(root["React"], root["ReactDOM"]);
-})(typeof self !== 'undefined' ? self : this, function(__WEBPACK_EXTERNAL_MODULE_3__, __WEBPACK_EXTERNAL_MODULE_12__) {
+})(this, function(__WEBPACK_EXTERNAL_MODULE_3__, __WEBPACK_EXTERNAL_MODULE_11__) {
 return /******/ (function(modules) { // webpackBootstrap
 /******/ 	// The module cache
 /******/ 	var installedModules = {};
@@ -70,7 +70,7 @@ return /******/ (function(modules) { // webpackBootstrap
 /******/ 	__webpack_require__.p = "/";
 /******/
 /******/ 	// Load entry module and return exports
-/******/ 	return __webpack_require__(__webpack_require__.s = 10);
+/******/ 	return __webpack_require__(__webpack_require__.s = 9);
 /******/ })
 /************************************************************************/
 /******/ ([
@@ -82,9 +82,11 @@ return /******/ (function(modules) { // webpackBootstrap
 
 /**
  * Copyright (c) 2013-present, Facebook, Inc.
+ * All rights reserved.
  *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
  *
  * 
  */
@@ -122,9 +124,11 @@ module.exports = emptyFunction;
 "use strict";
 /**
  * Copyright (c) 2013-present, Facebook, Inc.
+ * All rights reserved.
  *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
  *
  */
 
@@ -180,10 +184,12 @@ module.exports = invariant;
 
 "use strict";
 /**
- * Copyright (c) 2013-present, Facebook, Inc.
+ * Copyright 2013-present, Facebook, Inc.
+ * All rights reserved.
  *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
  */
 
 
@@ -204,10 +210,12 @@ module.exports = __WEBPACK_EXTERNAL_MODULE_3__;
 /***/ (function(module, exports, __webpack_require__) {
 
 /**
- * Copyright (c) 2013-present, Facebook, Inc.
+ * Copyright 2013-present, Facebook, Inc.
+ * All rights reserved.
  *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
  */
 
 if (undefined !== 'production') {
@@ -225,11 +233,11 @@ if (undefined !== 'production') {
   // By explicitly using `prop-types` you are opting into new development behavior.
   // http://fb.me/prop-types-in-prod
   var throwOnDirectAccess = true;
-  module.exports = __webpack_require__(13)(isValidElement, throwOnDirectAccess);
+  module.exports = __webpack_require__(12)(isValidElement, throwOnDirectAccess);
 } else {
   // By explicitly using `prop-types` you are opting into new production behavior.
   // http://fb.me/prop-types-in-prod
-  module.exports = __webpack_require__(16)();
+  module.exports = __webpack_require__(14)();
 }
 
 
@@ -239,10 +247,12 @@ if (undefined !== 'production') {
 
 "use strict";
 /**
- * Copyright (c) 2014-present, Facebook, Inc.
+ * Copyright 2014-2015, Facebook, Inc.
+ * All rights reserved.
  *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
  *
  */
 
@@ -260,43 +270,45 @@ var emptyFunction = __webpack_require__(0);
 var warning = emptyFunction;
 
 if (undefined !== 'production') {
-  var printWarning = function printWarning(format) {
-    for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
-      args[_key - 1] = arguments[_key];
-    }
-
-    var argIndex = 0;
-    var message = 'Warning: ' + format.replace(/%s/g, function () {
-      return args[argIndex++];
-    });
-    if (typeof console !== 'undefined') {
-      console.error(message);
-    }
-    try {
-      // --- Welcome to debugging React ---
-      // This error was thrown as a convenience so that you can use this stack
-      // to find the callsite that caused this warning to fire.
-      throw new Error(message);
-    } catch (x) {}
-  };
+  (function () {
+    var printWarning = function printWarning(format) {
+      for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+        args[_key - 1] = arguments[_key];
+      }
 
-  warning = function warning(condition, format) {
-    if (format === undefined) {
-      throw new Error('`warning(condition, format, ...args)` requires a warning ' + 'message argument');
-    }
+      var argIndex = 0;
+      var message = 'Warning: ' + format.replace(/%s/g, function () {
+        return args[argIndex++];
+      });
+      if (typeof console !== 'undefined') {
+        console.error(message);
+      }
+      try {
+        // --- Welcome to debugging React ---
+        // This error was thrown as a convenience so that you can use this stack
+        // to find the callsite that caused this warning to fire.
+        throw new Error(message);
+      } catch (x) {}
+    };
 
-    if (format.indexOf('Failed Composite propType: ') === 0) {
-      return; // Ignore CompositeComponent proptype check.
-    }
+    warning = function warning(condition, format) {
+      if (format === undefined) {
+        throw new Error('`warning(condition, format, ...args)` requires a warning ' + 'message argument');
+      }
 
-    if (!condition) {
-      for (var _len2 = arguments.length, args = Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {
-        args[_key2 - 2] = arguments[_key2];
+      if (format.indexOf('Failed Composite propType: ') === 0) {
+        return; // Ignore CompositeComponent proptype check.
       }
 
-      printWarning.apply(undefined, [format].concat(args));
-    }
-  };
+      if (!condition) {
+        for (var _len2 = arguments.length, args = Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {
+          args[_key2 - 2] = arguments[_key2];
+        }
+
+        printWarning.apply(undefined, [format].concat(args));
+      }
+    };
+  })();
 }
 
 module.exports = warning;
@@ -383,7 +395,7 @@ exports.show = show;
 exports.documentNotReadyOrSSRTesting = documentNotReadyOrSSRTesting;
 exports.resetForTesting = resetForTesting;
 
-var _warning = __webpack_require__(20);
+var _warning = __webpack_require__(18);
 
 var _warning2 = _interopRequireDefault(_warning);
 
@@ -445,54 +457,12 @@ function resetForTesting() {
 "use strict";
 
 
-Object.defineProperty(exports, "__esModule", {
-  value: true
-});
-exports.get = get;
-exports.add = add;
-exports.remove = remove;
-exports.totalCount = totalCount;
-var classListMap = {};
-
-function get() {
-  return classListMap;
-}
-
-function add(bodyClass) {
-  // Set variable and default if none
-  if (!classListMap[bodyClass]) {
-    classListMap[bodyClass] = 0;
-  }
-  classListMap[bodyClass] += 1;
-  return bodyClass;
-}
-
-function remove(bodyClass) {
-  if (classListMap[bodyClass]) {
-    classListMap[bodyClass] -= 1;
-  }
-  return bodyClass;
-}
-
-function totalCount() {
-  return Object.keys(classListMap).reduce(function (acc, curr) {
-    return acc + classListMap[curr];
-  }, 0);
-}
-
-/***/ }),
-/* 9 */
-/***/ (function(module, exports, __webpack_require__) {
-
-"use strict";
-
-
 Object.defineProperty(exports, "__esModule", {
   value: true
 });
 exports.canUseDOM = undefined;
 
-var _exenv = __webpack_require__(22);
+var _exenv = __webpack_require__(20);
 
 var _exenv2 = _interopRequireDefault(_exenv);
 
@@ -507,7 +477,7 @@ var canUseDOM = exports.canUseDOM = EE.canUseDOM;
 exports.default = SafeHTMLElement;
 
 /***/ }),
-/* 10 */
+/* 9 */
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -517,7 +487,7 @@ Object.defineProperty(exports, "__esModule", {
   value: true
 });
 
-var _Modal = __webpack_require__(11);
+var _Modal = __webpack_require__(10);
 
 var _Modal2 = _interopRequireDefault(_Modal);
 
@@ -527,7 +497,7 @@ exports.default = _Modal2.default;
 module.exports = exports["default"];
 
 /***/ }),
-/* 11 */
+/* 10 */
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -546,7 +516,7 @@ var _react = __webpack_require__(3);
 
 var _react2 = _interopRequireDefault(_react);
 
-var _reactDom = __webpack_require__(12);
+var _reactDom = __webpack_require__(11);
 
 var _reactDom2 = _interopRequireDefault(_reactDom);
 
@@ -554,7 +524,7 @@ var _propTypes = __webpack_require__(4);
 
 var _propTypes2 = _interopRequireDefault(_propTypes);
 
-var _ModalPortal = __webpack_require__(17);
+var _ModalPortal = __webpack_require__(15);
 
 var _ModalPortal2 = _interopRequireDefault(_ModalPortal);
 
@@ -562,7 +532,7 @@ var _ariaAppHider = __webpack_require__(7);
 
 var ariaAppHider = _interopRequireWildcard(_ariaAppHider);
 
-var _safeHTMLElement = __webpack_require__(9);
+var _safeHTMLElement = __webpack_require__(8);
 
 var _safeHTMLElement2 = _interopRequireDefault(_safeHTMLElement);
 
@@ -777,21 +747,23 @@ Modal.defaultStyles = {
 exports.default = Modal;
 
 /***/ }),
-/* 12 */
+/* 11 */
 /***/ (function(module, exports) {
 
-module.exports = __WEBPACK_EXTERNAL_MODULE_12__;
+module.exports = __WEBPACK_EXTERNAL_MODULE_11__;
 
 /***/ }),
-/* 13 */
+/* 12 */
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
 /**
- * Copyright (c) 2013-present, Facebook, Inc.
+ * Copyright 2013-present, Facebook, Inc.
+ * All rights reserved.
  *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
  */
 
 
@@ -799,10 +771,9 @@ module.exports = __WEBPACK_EXTERNAL_MODULE_12__;
 var emptyFunction = __webpack_require__(0);
 var invariant = __webpack_require__(1);
 var warning = __webpack_require__(5);
-var assign = __webpack_require__(14);
 
 var ReactPropTypesSecret = __webpack_require__(2);
-var checkPropTypes = __webpack_require__(15);
+var checkPropTypes = __webpack_require__(13);
 
 module.exports = function(isValidElement, throwOnDirectAccess) {
   /* global Symbol */
@@ -898,8 +869,7 @@ module.exports = function(isValidElement, throwOnDirectAccess) {
     objectOf: createObjectOfTypeChecker,
     oneOf: createEnumTypeChecker,
     oneOfType: createUnionTypeChecker,
-    shape: createShapeTypeChecker,
-    exact: createStrictShapeTypeChecker,
+    shape: createShapeTypeChecker
   };
 
   /**
@@ -1114,7 +1084,7 @@ module.exports = function(isValidElement, throwOnDirectAccess) {
       if (typeof checker !== 'function') {
         warning(
           false,
-          'Invalid argument supplied to oneOfType. Expected an array of check functions, but ' +
+          'Invalid argument supplid to oneOfType. Expected an array of check functions, but ' +
           'received %s at index %s.',
           getPostfixForTypeWarning(checker),
           i
@@ -1168,36 +1138,6 @@ module.exports = function(isValidElement, throwOnDirectAccess) {
     return createChainableTypeChecker(validate);
   }
 
-  function createStrictShapeTypeChecker(shapeTypes) {
-    function validate(props, propName, componentName, location, propFullName) {
-      var propValue = props[propName];
-      var propType = getPropType(propValue);
-      if (propType !== 'object') {
-        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type `' + propType + '` ' + ('supplied to `' + componentName + '`, expected `object`.'));
-      }
-      // We need to check all keys in case some are required but missing from
-      // props.
-      var allKeys = assign({}, props[propName], shapeTypes);
-      for (var key in allKeys) {
-        var checker = shapeTypes[key];
-        if (!checker) {
-          return new PropTypeError(
-            'Invalid ' + location + ' `' + propFullName + '` key `' + key + '` supplied to `' + componentName + '`.' +
-            '\nBad object: ' + JSON.stringify(props[propName], null, '  ') +
-            '\nValid keys: ' +  JSON.stringify(Object.keys(shapeTypes), null, '  ')
-          );
-        }
-        var error = checker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret);
-        if (error) {
-          return error;
-        }
-      }
-      return null;
-    }
-
-    return createChainableTypeChecker(validate);
-  }
-
   function isNode(propValue) {
     switch (typeof propValue) {
       case 'number':
@@ -1332,112 +1272,17 @@ module.exports = function(isValidElement, throwOnDirectAccess) {
 
 
 /***/ }),
-/* 14 */
-/***/ (function(module, exports, __webpack_require__) {
-
-"use strict";
-/*
-object-assign
-(c) Sindre Sorhus
-@license MIT
-*/
-
-
-/* eslint-disable no-unused-vars */
-var getOwnPropertySymbols = Object.getOwnPropertySymbols;
-var hasOwnProperty = Object.prototype.hasOwnProperty;
-var propIsEnumerable = Object.prototype.propertyIsEnumerable;
-
-function toObject(val) {
-	if (val === null || val === undefined) {
-		throw new TypeError('Object.assign cannot be called with null or undefined');
-	}
-
-	return Object(val);
-}
-
-function shouldUseNative() {
-	try {
-		if (!Object.assign) {
-			return false;
-		}
-
-		// Detect buggy property enumeration order in older V8 versions.
-
-		// https://bugs.chromium.org/p/v8/issues/detail?id=4118
-		var test1 = new String('abc');  // eslint-disable-line no-new-wrappers
-		test1[5] = 'de';
-		if (Object.getOwnPropertyNames(test1)[0] === '5') {
-			return false;
-		}
-
-		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
-		var test2 = {};
-		for (var i = 0; i < 10; i++) {
-			test2['_' + String.fromCharCode(i)] = i;
-		}
-		var order2 = Object.getOwnPropertyNames(test2).map(function (n) {
-			return test2[n];
-		});
-		if (order2.join('') !== '0123456789') {
-			return false;
-		}
-
-		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
-		var test3 = {};
-		'abcdefghijklmnopqrst'.split('').forEach(function (letter) {
-			test3[letter] = letter;
-		});
-		if (Object.keys(Object.assign({}, test3)).join('') !==
-				'abcdefghijklmnopqrst') {
-			return false;
-		}
-
-		return true;
-	} catch (err) {
-		// We don't expect any of the above to throw, but better to be safe.
-		return false;
-	}
-}
-
-module.exports = shouldUseNative() ? Object.assign : function (target, source) {
-	var from;
-	var to = toObject(target);
-	var symbols;
-
-	for (var s = 1; s < arguments.length; s++) {
-		from = Object(arguments[s]);
-
-		for (var key in from) {
-			if (hasOwnProperty.call(from, key)) {
-				to[key] = from[key];
-			}
-		}
-
-		if (getOwnPropertySymbols) {
-			symbols = getOwnPropertySymbols(from);
-			for (var i = 0; i < symbols.length; i++) {
-				if (propIsEnumerable.call(from, symbols[i])) {
-					to[symbols[i]] = from[symbols[i]];
-				}
-			}
-		}
-	}
-
-	return to;
-};
-
-
-/***/ }),
-/* 15 */
+/* 13 */
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
 /**
- * Copyright (c) 2013-present, Facebook, Inc.
+ * Copyright 2013-present, Facebook, Inc.
+ * All rights reserved.
  *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
  */
 
 
@@ -1471,7 +1316,7 @@ function checkPropTypes(typeSpecs, values, location, componentName, getStack) {
         try {
           // This is intentionally an invariant that gets caught. It's the same
           // behavior as without this statement except with a better message.
-          invariant(typeof typeSpecs[typeSpecName] === 'function', '%s: %s type `%s` is invalid; it must be a function, usually from ' + 'the `prop-types` package, but received `%s`.', componentName || 'React class', location, typeSpecName, typeof typeSpecs[typeSpecName]);
+          invariant(typeof typeSpecs[typeSpecName] === 'function', '%s: %s type `%s` is invalid; it must be a function, usually from ' + 'React.PropTypes.', componentName || 'React class', location, typeSpecName);
           error = typeSpecs[typeSpecName](values, typeSpecName, componentName, location, null, ReactPropTypesSecret);
         } catch (ex) {
           error = ex;
@@ -1495,15 +1340,17 @@ module.exports = checkPropTypes;
 
 
 /***/ }),
-/* 16 */
+/* 14 */
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
 /**
- * Copyright (c) 2013-present, Facebook, Inc.
+ * Copyright 2013-present, Facebook, Inc.
+ * All rights reserved.
  *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
  */
 
 
@@ -1548,8 +1395,7 @@ module.exports = function() {
     objectOf: getShim,
     oneOf: getShim,
     oneOfType: getShim,
-    shape: getShim,
-    exact: getShim
+    shape: getShim
   };
 
   ReactPropTypes.checkPropTypes = emptyFunction;
@@ -1560,7 +1406,7 @@ module.exports = function() {
 
 
 /***/ }),
-/* 17 */
+/* 15 */
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -1584,11 +1430,11 @@ var _propTypes = __webpack_require__(4);
 
 var _propTypes2 = _interopRequireDefault(_propTypes);
 
-var _focusManager = __webpack_require__(18);
+var _focusManager = __webpack_require__(16);
 
 var focusManager = _interopRequireWildcard(_focusManager);
 
-var _scopeTab = __webpack_require__(19);
+var _scopeTab = __webpack_require__(17);
 
 var _scopeTab2 = _interopRequireDefault(_scopeTab);
 
@@ -1596,15 +1442,11 @@ var _ariaAppHider = __webpack_require__(7);
 
 var ariaAppHider = _interopRequireWildcard(_ariaAppHider);
 
-var _refCount = __webpack_require__(8);
-
-var refCount = _interopRequireWildcard(_refCount);
-
-var _bodyClassList = __webpack_require__(21);
+var _bodyClassList = __webpack_require__(19);
 
 var bodyClassList = _interopRequireWildcard(_bodyClassList);
 
-var _safeHTMLElement = __webpack_require__(9);
+var _safeHTMLElement = __webpack_require__(8);
 
 var _safeHTMLElement2 = _interopRequireDefault(_safeHTMLElement);
 
@@ -1627,6 +1469,8 @@ var CLASS_NAMES = {
 var TAB_KEY = 9;
 var ESC_KEY = 27;
 
+var ariaHiddenInstances = 0;
+
 var ModalPortal = function (_Component) {
   _inherits(ModalPortal, _Component);
 
@@ -1657,8 +1501,12 @@ var ModalPortal = function (_Component) {
       bodyClassList.remove(_this.props.bodyOpenClassName);
 
       // Reset aria-hidden attribute if all modals have been removed
-      if (ariaHideApp && refCount.totalCount() < 1) {
-        ariaAppHider.show(appElement);
+      if (ariaHideApp && ariaHiddenInstances > 0) {
+        ariaHiddenInstances -= 1;
+
+        if (ariaHiddenInstances === 0) {
+          ariaAppHider.show(appElement);
+        }
       }
 
       if (_this.props.shouldFocusAfterRender) {
@@ -1877,6 +1725,7 @@ var ModalPortal = function (_Component) {
       bodyClassList.add(bodyOpenClassName);
       // Add aria-hidden to appElement
       if (ariaHideApp) {
+        ariaHiddenInstances += 1;
         ariaAppHider.hide(appElement);
       }
     }
@@ -1965,7 +1814,7 @@ exports.default = ModalPortal;
 module.exports = exports["default"];
 
 /***/ }),
-/* 18 */
+/* 16 */
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -2065,7 +1914,7 @@ function teardownScopedFocus() {
 }
 
 /***/ }),
-/* 19 */
+/* 17 */
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -2146,7 +1995,7 @@ function scopeTab(node, event) {
 module.exports = exports["default"];
 
 /***/ }),
-/* 20 */
+/* 18 */
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -2213,7 +2062,7 @@ module.exports = warning;
 
 
 /***/ }),
-/* 21 */
+/* 19 */
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -2222,35 +2071,44 @@ module.exports = warning;
 Object.defineProperty(exports, "__esModule", {
   value: true
 });
-exports.add = add;
-exports.remove = remove;
-
-var _refCount = __webpack_require__(8);
+var classListMap = {};
 
-var refCount = _interopRequireWildcard(_refCount);
+var addClassToMap = function addClassToMap(className) {
+  // Set variable and default if none
+  if (!classListMap[className]) {
+    classListMap[className] = 0;
+  }
+  classListMap[className] += 1;
+  return className;
+};
 
-function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+var removeClassFromMap = function removeClassFromMap(className) {
+  if (classListMap[className]) {
+    classListMap[className] -= 1;
+  }
+  return className;
+};
 
-function add(bodyClass) {
-  // Increment class(es) on refCount tracker and add class(es) to body
-  bodyClass.split(" ").map(refCount.add).forEach(function (className) {
+var add = function add(bodyClass) {
+  bodyClass.split(" ").map(addClassToMap).forEach(function (className) {
     return document.body.classList.add(className);
   });
-}
+};
 
-function remove(bodyClass) {
-  var classListMap = refCount.get();
-  // Decrement class(es) from the refCount tracker
-  // and remove unused class(es) from body
-  bodyClass.split(" ").map(refCount.remove).filter(function (className) {
+var remove = function remove(bodyClass) {
+  // Remove unused class(es) from body
+  bodyClass.split(" ").map(removeClassFromMap).filter(function (className) {
     return classListMap[className] === 0;
   }).forEach(function (className) {
     return document.body.classList.remove(className);
   });
-}
+};
+
+exports.add = add;
+exports.remove = remove;
 
 /***/ }),
-/* 22 */
+/* 20 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var __WEBPACK_AMD_DEFINE_RESULT__;/*!
@@ -2283,9 +2141,9 @@ var __WEBPACK_AMD_DEFINE_RESULT__;/*!
 	};
 
 	if (true) {
-		!(__WEBPACK_AMD_DEFINE_RESULT__ = (function () {
+		!(__WEBPACK_AMD_DEFINE_RESULT__ = function () {
 			return ExecutionEnvironment;
-		}).call(exports, __webpack_require__, exports, module),
+		}.call(exports, __webpack_require__, exports, module),
 				__WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
 	} else if (typeof module !== 'undefined' && module.exports) {
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diff --git a/dist/react-modal.min.js b/dist/react-modal.min.js
index 0f76a417..ff3dc78b 100644
--- a/dist/react-modal.min.js
+++ b/dist/react-modal.min.js
@@ -1,4 +1,4 @@
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+!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t(require("react"),require("react-dom")):"function"==typeof define&&define.amd?define(["react","react-dom"],t):"object"==typeof exports?exports.ReactModal=t(require("react"),require("react-dom")):e.ReactModal=t(e.React,e.ReactDOM)}(this,function(e,t){return function(e){function t(o){if(n[o])return n[o].exports;var r=n[o]={i:o,l:!1,exports:{}};return e[o].call(r.exports,r,r.exports,t),r.l=!0,r.exports}var n={};return t.m=e,t.c=n,t.d=function(e,n,o){t.o(e,n)||Object.defineProperty(e,n,{configurable:!1,enumerable:!0,get:o})},t.n=function(e){var n=e&&e.__esModule?function(){return e.default}:function(){return e};return t.d(n,"a",n),n},t.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},t.p="/",t(t.s=9)}([function(e,t,n){"use strict";function o(e){return function(){return e}}var r=function(){};r.thatReturns=o,r.thatReturnsFalse=o(!1),r.thatReturnsTrue=o(!0),r.thatReturnsNull=o(null),r.thatReturnsThis=function(){return this},r.thatReturnsArgument=function(e){return e},e.exports=r},function(e,t,n){"use strict";function o(e,t,n,o,a,u,s,i){if(r(t),!e){var l;if(void 0===t)l=new Error("Minified exception occurred; use the non-minified dev environment for the full error message and additional helpful warnings.");else{var c=[n,o,a,u,s,i],f=0;l=new Error(t.replace(/%s/g,function(){return c[f++]})),l.name="Invariant Violation"}throw l.framesToPop=1,l}}var r=function(e){};r=function(e){if(void 0===e)throw new Error("invariant requires an error message argument")},e.exports=o},function(e,t,n){"use strict";e.exports="SECRET_DO_NOT_PASS_THIS_OR_YOU_WILL_BE_FIRED"},function(t,n){t.exports=e},function(e,t,n){var o="function"==typeof Symbol&&Symbol.for&&Symbol.for("react.element")||60103,r=function(e){return"object"==typeof e&&null!==e&&e.$$typeof===o};e.exports=n(12)(r,!0)},function(e,t,n){"use strict";var o=n(0),r=o;!function(){var e=function(e){for(var t=arguments.length,n=Array(t>1?t-1:0),o=1;o<t;o++)n[o-1]=arguments[o];var r=0,a="Warning: "+e.replace(/%s/g,function(){return n[r++]});"undefined"!=typeof console&&console.error(a);try{throw new Error(a)}catch(e){}};r=function(t,n){if(void 0===n)throw new Error("`warning(condition, format, ...args)` requires a warning message argument");if(0!==n.indexOf("Failed Composite propType: ")&&!t){for(var o=arguments.length,r=Array(o>2?o-2:0),a=2;a<o;a++)r[a-2]=arguments[a];e.apply(void 0,[n].concat(r))}}}(),e.exports=r},function(e,t,n){"use strict";function o(e){var t=e.offsetWidth<=0&&e.offsetHeight<=0;if(t&&!e.innerHTML)return!0;var n=window.getComputedStyle(e);return t?"visible"!==n.getPropertyValue("overflow"):"none"==n.getPropertyValue("display")}function r(e){for(var t=e;t&&t!==document.body;){if(o(t))return!1;t=t.parentNode}return!0}function a(e,t){var n=e.nodeName.toLowerCase();return(i.test(n)&&!e.disabled||("a"===n?e.href||t:t))&&r(e)}function u(e){var t=e.getAttribute("tabindex");null===t&&(t=void 0);var n=isNaN(t);return(n||t>=0)&&a(e,!n)}function s(e){return[].slice.call(e.querySelectorAll("*"),0).filter(u)}Object.defineProperty(t,"__esModule",{value:!0}),t.default=s;/*!
  * Adapted from jQuery UI core
  *
  * http://jqueryui.com
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  *
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-@license MIT
-*/
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diff --git a/package.json b/package.json
index b7cb061a..b22cbb76 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "react-modal",
-  "version": "3.1.11",
+  "version": "3.1.12",
   "description": "Accessible modal dialog component for React.JS",
   "main": "./lib/index.js",
   "repository": {