diff --git a/sdk/core/azure-core/CHANGELOG.md b/sdk/core/azure-core/CHANGELOG.md
index c1ebe07174af..42f8ae792979 100644
--- a/sdk/core/azure-core/CHANGELOG.md
+++ b/sdk/core/azure-core/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Release History
 
+## 1.21.1 (Unreleased)
+
+### Features Added
+
+### Breaking Changes
+
+### Bugs Fixed
+
+### Other Changes
+
 ## 1.21.0 (2021-12-02)
 
 ### Breaking Changes
diff --git a/sdk/core/azure-core/azure/core/_version.py b/sdk/core/azure-core/azure/core/_version.py
index b191f368de9f..1d982883132d 100644
--- a/sdk/core/azure-core/azure/core/_version.py
+++ b/sdk/core/azure-core/azure/core/_version.py
@@ -9,4 +9,4 @@
 # regenerated.
 # --------------------------------------------------------------------------
 
-VERSION = "1.21.0"
+VERSION = "1.21.1"