diff --git a/sdk/cosmos/azure-cosmos/CHANGELOG.md b/sdk/cosmos/azure-cosmos/CHANGELOG.md
index 17b8fe592934..ae40a6fe33a8 100644
--- a/sdk/cosmos/azure-cosmos/CHANGELOG.md
+++ b/sdk/cosmos/azure-cosmos/CHANGELOG.md
@@ -1,5 +1,15 @@
 ## Release History
 
+### 4.15.1 (Unreleased)
+
+#### Features Added
+
+#### Breaking Changes
+
+#### Bugs Fixed
+
+#### Other Changes
+
 ### 4.15.0 (2026-02-19)
 
 #### Features Added
diff --git a/sdk/cosmos/azure-cosmos/azure/cosmos/_version.py b/sdk/cosmos/azure-cosmos/azure/cosmos/_version.py
index 9bd9dc618336..3a0c2363037b 100644
--- a/sdk/cosmos/azure-cosmos/azure/cosmos/_version.py
+++ b/sdk/cosmos/azure-cosmos/azure/cosmos/_version.py
@@ -19,4 +19,4 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-VERSION = "4.15.0"
+VERSION = "4.15.1"