diff --git a/sdk/monitor/azure-monitor-opentelemetry/CHANGELOG.md b/sdk/monitor/azure-monitor-opentelemetry/CHANGELOG.md
index 3f7cd05f11bd..7687dd98dc0a 100644
--- a/sdk/monitor/azure-monitor-opentelemetry/CHANGELOG.md
+++ b/sdk/monitor/azure-monitor-opentelemetry/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Release History
 
+## 1.6.6 (Unreleased)
+
+### Features Added
+
+### Breaking Changes
+
+### Bugs Fixed
+
+### Other Changes
+
 ## 1.6.5 (2025-02-14)
 
 ### Features Added
diff --git a/sdk/monitor/azure-monitor-opentelemetry/azure/monitor/opentelemetry/_version.py b/sdk/monitor/azure-monitor-opentelemetry/azure/monitor/opentelemetry/_version.py
index d9cc70f5ff87..d6be6ec2d9fd 100644
--- a/sdk/monitor/azure-monitor-opentelemetry/azure/monitor/opentelemetry/_version.py
+++ b/sdk/monitor/azure-monitor-opentelemetry/azure/monitor/opentelemetry/_version.py
@@ -4,4 +4,4 @@
 # license information.
 # --------------------------------------------------------------------------
 
-VERSION = "1.6.5"
+VERSION = "1.6.6"