diff --git a/package-lock.json b/package-lock.json
index a76e1a8..1bb224c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "@types/react-router": "2.0.38",
         "babel-polyfill": "^6.9.1",
         "byots": "^2.1.0-dev.20161101.22.10",
-        "codemirror": "^5.20.2",
+        "codemirror": "^5.58.2",
         "css-to-typestyle": "^0.0.9",
         "csstips": "^0.2.2",
         "csx": "^8.5.0",
@@ -845,9 +845,9 @@
       }
     },
     "node_modules/codemirror": {
-      "version": "5.34.0",
-      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.34.0.tgz",
-      "integrity": "sha512-7ke9DJB350sChxq1skTmotVZsJtiJo1ihC41rq8IyOMZv47Z1AQygoevWHs0PJTw2eBphmB7gA3AbPrVrnfwPw=="
+      "version": "5.58.2",
+      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.58.2.tgz",
+      "integrity": "sha512-K/hOh24cCwRutd1Mk3uLtjWzNISOkm4fvXiMO7LucCrqbh6aJDdtqUziim3MZUI6wOY0rvY1SlL1Ork01uMy6w=="
     },
     "node_modules/collection-visit": {
       "version": "1.0.0",
@@ -8351,9 +8351,9 @@
       "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c="
     },
     "codemirror": {
-      "version": "5.34.0",
-      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.34.0.tgz",
-      "integrity": "sha512-7ke9DJB350sChxq1skTmotVZsJtiJo1ihC41rq8IyOMZv47Z1AQygoevWHs0PJTw2eBphmB7gA3AbPrVrnfwPw=="
+      "version": "5.58.2",
+      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.58.2.tgz",
+      "integrity": "sha512-K/hOh24cCwRutd1Mk3uLtjWzNISOkm4fvXiMO7LucCrqbh6aJDdtqUziim3MZUI6wOY0rvY1SlL1Ork01uMy6w=="
     },
     "collection-visit": {
       "version": "1.0.0",
diff --git a/package.json b/package.json
index 0f0a1c3..98c8288 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "@types/react-router": "2.0.38",
     "babel-polyfill": "^6.9.1",
     "byots": "^2.1.0-dev.20161101.22.10",
-    "codemirror": "^5.20.2",
+    "codemirror": "^5.58.2",
     "css-to-typestyle": "^0.0.9",
     "csstips": "^0.2.2",
     "csx": "^8.5.0",