diff --git a/packages/toolbox-core/pyproject.toml b/packages/toolbox-core/pyproject.toml
index d2caefd5..0f08e294 100644
--- a/packages/toolbox-core/pyproject.toml
+++ b/packages/toolbox-core/pyproject.toml
@@ -44,7 +44,7 @@ Changelog = "https://github.com/googleapis/mcp-toolbox-sdk-python/blob/main/pack
 test = [
     "black[jupyter]==25.1.0",
     "isort==6.0.1",
-    "mypy==1.16.0",
+    "mypy==1.16.1",
     "pytest==8.4.0",
     "pytest-aioresponses==0.3.0",
     "pytest-asyncio==1.0.0",
diff --git a/packages/toolbox-langchain/pyproject.toml b/packages/toolbox-langchain/pyproject.toml
index 63288bb2..f22c0d2a 100644
--- a/packages/toolbox-langchain/pyproject.toml
+++ b/packages/toolbox-langchain/pyproject.toml
@@ -46,7 +46,7 @@ Changelog = "https://github.com/googleapis/mcp-toolbox-sdk-python/blob/main/pack
 test = [
     "black[jupyter]==25.1.0",
     "isort==6.0.1",
-    "mypy==1.16.0",
+    "mypy==1.16.1",
     "pytest-asyncio==1.0.0",
     "pytest==8.4.0",
     "pytest-cov==6.2.1",
diff --git a/packages/toolbox-llamaindex/pyproject.toml b/packages/toolbox-llamaindex/pyproject.toml
index 826d7786..80ac3aa7 100644
--- a/packages/toolbox-llamaindex/pyproject.toml
+++ b/packages/toolbox-llamaindex/pyproject.toml
@@ -46,7 +46,7 @@ Changelog = "https://github.com/googleapis/mcp-toolbox-sdk-python/blob/main/pack
 test = [
     "black[jupyter]==25.1.0",
     "isort==6.0.1",
-    "mypy==1.16.0",
+    "mypy==1.16.1",
     "pytest-asyncio==1.0.0",
     "pytest==8.4.0",
     "pytest-cov==6.2.1",