diff --git a/VERSION b/VERSION
index 4c56c86a5a..d81616e62d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.3.20
\ No newline at end of file
+6.3.21
\ No newline at end of file
diff --git a/packages/babel-core/package.json b/packages/babel-core/package.json
index dcacdc2ffc..d56aad837e 100644
--- a/packages/babel-core/package.json
+++ b/packages/babel-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "babel-core",
-  "version": "6.3.17",
+  "version": "6.3.21",
   "description": "Babel compiler core.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -25,15 +25,15 @@
   },
   "dependencies": {
     "babel-code-frame": "^6.3.13",
-    "babel-generator": "^6.3.17",
+    "babel-generator": "^6.3.21",
     "babel-helpers": "^6.3.13",
     "babel-messages": "^6.3.13",
     "babel-template": "^6.3.13",
     "babel-runtime": "^5.0.0",
     "babel-register": "^6.3.13",
-    "babel-traverse": "^6.3.17",
-    "babel-types": "^6.3.17",
-    "babylon": "^6.3.15",
+    "babel-traverse": "^6.3.21",
+    "babel-types": "^6.3.21",
+    "babylon": "^6.3.21",
     "convert-source-map": "^1.1.0",
     "debug": "^2.1.1",
     "json5": "^0.4.0",
diff --git a/packages/babel-generator/package.json b/packages/babel-generator/package.json
index da62442c47..63987cd327 100644
--- a/packages/babel-generator/package.json
+++ b/packages/babel-generator/package.json
@@ -1,6 +1,6 @@
 {
   "name": "babel-generator",
-  "version": "6.3.20",
+  "version": "6.3.21",
   "description": "Turns an AST into code.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -13,7 +13,7 @@
   "dependencies": {
     "babel-messages": "^6.3.18",
     "babel-runtime": "^5.0.0",
-    "babel-types": "^6.3.20",
+    "babel-types": "^6.3.21",
     "detect-indent": "^3.0.1",
     "is-integer": "^1.0.4",
     "lodash": "^3.10.1",
@@ -23,6 +23,6 @@
   },
   "devDependencies": {
     "babel-helper-fixtures": "^6.3.13",
-    "babylon": "^6.3.20"
+    "babylon": "^6.3.21"
   }
 }
diff --git a/packages/babel-plugin-transform-es2015-function-name/package.json b/packages/babel-plugin-transform-es2015-function-name/package.json
index ba558f31b4..a6df1b9912 100644
--- a/packages/babel-plugin-transform-es2015-function-name/package.json
+++ b/packages/babel-plugin-transform-es2015-function-name/package.json
@@ -1,6 +1,6 @@
 {
   "name": "babel-plugin-transform-es2015-function-name",
-  "version": "6.3.19",
+  "version": "6.3.21",
   "description": "Apply ES2015 function.name semantics to all functions",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-es2015-function-name",
   "license": "MIT",
@@ -10,7 +10,7 @@
   ],
   "dependencies": {
     "babel-helper-function-name": "^6.3.13",
-    "babel-types": "^6.3.13",
+    "babel-types": "^6.3.21",
     "babel-runtime": "^5.0.0"
   },
   "devDependencies": {
diff --git a/packages/babel-plugin-transform-es2015-parameters/package.json b/packages/babel-plugin-transform-es2015-parameters/package.json
index 7894b6cfd8..f089574fb6 100644
--- a/packages/babel-plugin-transform-es2015-parameters/package.json
+++ b/packages/babel-plugin-transform-es2015-parameters/package.json
@@ -1,16 +1,16 @@
 {
   "name": "babel-plugin-transform-es2015-parameters",
-  "version": "6.3.18",
+  "version": "6.3.21",
   "description": "Compile ES2015 default and rest parameters to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-es2015-parameters",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "babel-traverse": "^6.3.13",
+    "babel-traverse": "^6.3.21",
     "babel-helper-call-delegate": "^6.3.13",
     "babel-helper-get-function-arity": "^6.3.13",
     "babel-template": "^6.3.13",
-    "babel-types": "^6.3.18",
+    "babel-types": "^6.3.21",
     "babel-runtime": "^5.0.0"
   },
   "keywords": [
diff --git a/packages/babel-traverse/package.json b/packages/babel-traverse/package.json
index 7f4688e324..fa3154726e 100644
--- a/packages/babel-traverse/package.json
+++ b/packages/babel-traverse/package.json
@@ -1,6 +1,6 @@
 {
   "name": "babel-traverse",
-  "version": "6.3.19",
+  "version": "6.3.21",
   "description": "",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -11,8 +11,8 @@
     "babel-code-frame": "^6.3.13",
     "babel-messages": "^6.3.13",
     "babel-runtime": "^5.0.0",
-    "babel-types": "^6.3.17",
-    "babylon": "^6.3.15",
+    "babel-types": "^6.3.21",
+    "babylon": "^6.3.21",
     "debug": "^2.2.0",
     "globals": "^8.3.0",
     "invariant": "^2.2.0",
diff --git a/packages/babel-types/package.json b/packages/babel-types/package.json
index ae35c2ed83..7a5ca955d9 100644
--- a/packages/babel-types/package.json
+++ b/packages/babel-types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "babel-types",
-  "version": "6.3.20",
+  "version": "6.3.21",
   "description": "",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -9,7 +9,7 @@
   "main": "lib/index.js",
   "dependencies": {
     "babel-runtime": "^5.0.0",
-    "babel-traverse": "^6.3.17",
+    "babel-traverse": "^6.3.21",
     "esutils": "^2.0.2",
     "lodash": "^3.10.1",
     "to-fast-properties": "^1.0.1"
diff --git a/packages/babylon/package.json b/packages/babylon/package.json
index cb097ef103..c850686262 100644
--- a/packages/babylon/package.json
+++ b/packages/babylon/package.json
@@ -1,6 +1,6 @@
 {
   "name": "babylon",
-  "version": "6.3.20",
+  "version": "6.3.21",
   "description": "A JavaScript parser",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",