diff --git a/CHANGELOG.md b/CHANGELOG.md
index dfed8ea4ae..d3e62bd6f7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,11 @@ _Note: Gaps between patch versions are faulty/broken releases._
 
 See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
 
+## 4.5.5
+
+ * **Polish**
+  * Delete old extensions when overriding them in `babel/register`.
+
 ## 4.5.3
 
  * **Bug Fix**
diff --git a/packages/babel-runtime/package.json b/packages/babel-runtime/package.json
index b00a51e7b3..038c572655 100644
--- a/packages/babel-runtime/package.json
+++ b/packages/babel-runtime/package.json
@@ -1,7 +1,7 @@
 {
   "name": "babel-runtime",
   "description": "babel selfContained runtime",
-  "version": "4.5.4",
+  "version": "4.5.5",
   "repository": "babel/babel",
   "author": "Sebastian McKenzie <sebmck@gmail.com>"
 }
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