diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8873b92b..c79ad85b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## [1.1.19](https://github.com/trpc-group/trpc-agent-python/releases/tag/v1.1.19) (2026-08-21)
+
+Version bump to keep the `main` and `r0.1` branches in sync; carries forward the fixes already included in 1.1.18 (LLM streaming interruption span fixes and CI extension package installation).
+
 ## [1.1.18](https://github.com/trpc-group/trpc-agent-python/releases/tag/v1.1.18) (2026-08-21)
 
 ### Bug Fixes
diff --git a/tests/test_version.py b/tests/test_version.py
index 6931bdcb..913c7be5 100644
--- a/tests/test_version.py
+++ b/tests/test_version.py
@@ -10,4 +10,4 @@
 
 def test_version():
     """Test the version module."""
-    assert __version__ == '1.1.18'
+    assert __version__ == '1.1.19'
diff --git a/trpc_agent_sdk/version.py b/trpc_agent_sdk/version.py
index 9957a374..3d50d525 100644
--- a/trpc_agent_sdk/version.py
+++ b/trpc_agent_sdk/version.py
@@ -9,4 +9,4 @@
 This module defines the version information for TRPC Agent
 """
 
-__version__ = '1.1.18'
+__version__ = '1.1.19'