diff --git a/packages/toolbox-core/pyproject.toml b/packages/toolbox-core/pyproject.toml
index 870564c9..40b28b09 100644
--- a/packages/toolbox-core/pyproject.toml
+++ b/packages/toolbox-core/pyproject.toml
@@ -45,7 +45,7 @@ Changelog = "https://github.com/googleapis/mcp-toolbox-sdk-python/blob/main/pack
 [project.optional-dependencies]
 test = [
     "black[jupyter]==25.9.0",
-    "isort==6.1.0",
+    "isort==7.0.0",
     "mypy==1.18.2",
     "pytest==8.4.2",
     "pytest-aioresponses==0.3.0",
diff --git a/packages/toolbox-langchain/pyproject.toml b/packages/toolbox-langchain/pyproject.toml
index 72281e90..7d02aeb6 100644
--- a/packages/toolbox-langchain/pyproject.toml
+++ b/packages/toolbox-langchain/pyproject.toml
@@ -45,7 +45,7 @@ Changelog = "https://github.com/googleapis/mcp-toolbox-sdk-python/blob/main/pack
 [project.optional-dependencies]
 test = [
     "black[jupyter]==25.9.0",
-    "isort==6.1.0",
+    "isort==7.0.0",
     "mypy==1.18.2",
     "pytest-asyncio==1.2.0",
     "pytest==8.4.2",
diff --git a/packages/toolbox-llamaindex/pyproject.toml b/packages/toolbox-llamaindex/pyproject.toml
index b5080133..140cdf3b 100644
--- a/packages/toolbox-llamaindex/pyproject.toml
+++ b/packages/toolbox-llamaindex/pyproject.toml
@@ -45,7 +45,7 @@ Changelog = "https://github.com/googleapis/mcp-toolbox-sdk-python/blob/main/pack
 [project.optional-dependencies]
 test = [
     "black[jupyter]==25.9.0",
-    "isort==6.1.0",
+    "isort==7.0.0",
     "mypy==1.18.2",
     "pytest-asyncio==1.2.0",
     "pytest==8.4.2",