diff --git a/CHANGELOG.md b/CHANGELOG.md
index 83eafcec867..374271dba03 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,10 @@
 Change Log
 ===
 
+v3.12.0-dev.1
+---
+* [bugfix] Fix null reference bug in typedef rule (#1345)
+
 v3.12.0
 ---
 * Stable release containing changes from the last dev release (v3.12.0-dev.0)
diff --git a/package.json b/package.json
index 4a076e8de8c..e47314bf10f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "tslint",
-  "version": "3.12.0-dev.0",
+  "version": "3.12.0-dev.1",
   "description": "An extensible static analysis linter for the TypeScript language",
   "bin": {
     "tslint": "./bin/tslint"
diff --git a/src/tslint.ts b/src/tslint.ts
index 2bf0bc81ea9..8395b1d3e6e 100644
--- a/src/tslint.ts
+++ b/src/tslint.ts
@@ -33,7 +33,7 @@ import { loadRules } from "./ruleLoader";
 import { arrayify } from "./utils";
 
 class Linter {
-    public static VERSION = "3.12.0-dev.0";
+    public static VERSION = "3.12.0-dev.1";
 
     public static findConfiguration = findConfiguration;
     public static findConfigurationPath = findConfigurationPath;