diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7a4fff160f..0c1542a96a 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.
 
+## 5.1.5
+
+ * **Internal**
+  * Bump `core-js` version.
+
 ## 5.1.4
 
  * **Polish**
diff --git a/package.json b/package.json
index 4d458559f7..5ecdafb347 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "ast-types": "~0.7.0",
     "chalk": "^1.0.0",
     "convert-source-map": "^1.0.0",
-    "core-js": "^0.8.1",
+    "core-js": "^0.8.3",
     "debug": "^2.1.1",
     "detect-indent": "^3.0.0",
     "estraverse": "^3.0.0",