diff --git a/mcp-client-python/pyproject.toml b/mcp-client-python/pyproject.toml
index c4c72f5b..39f43241 100644
--- a/mcp-client-python/pyproject.toml
+++ b/mcp-client-python/pyproject.toml
@@ -6,7 +6,7 @@ readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
     "anthropic>=0.87.0",
-    "mcp>=1.26.0",
+    "mcp>=1.27.2",
     "python-dotenv>=1.2.2",
 ]
 
diff --git a/mcp-client-python/uv.lock b/mcp-client-python/uv.lock
index 1a99a088..ec565397 100644
--- a/mcp-client-python/uv.lock
+++ b/mcp-client-python/uv.lock
@@ -436,7 +436,7 @@ wheels = [
 
 [[package]]
 name = "mcp"
-version = "1.26.0"
+version = "1.27.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
@@ -454,9 +454,9 @@ dependencies = [
     { name = "typing-inspection" },
     { name = "uvicorn", marker = "sys_platform != 'emscripten'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/fc/6d/62e76bbb8144d6ed86e202b5edd8a4cb631e7c8130f3f4893c3f90262b10/mcp-1.26.0.tar.gz", hash = "sha256:db6e2ef491eecc1a0d93711a76f28dec2e05999f93afd48795da1c1137142c66", size = 608005, upload-time = "2026-01-24T19:40:32.468Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/27/3c/347cf965d313f5d41764e7d46bea6ffe7d9ef13b983cc429b0340962a082/mcp-1.27.2.tar.gz", hash = "sha256:8e02db104096d1c25b28e64bde29a5c32b31bc241710213e12fd4d84985bdfef", size = 621116, upload-time = "2026-05-29T17:16:04.039Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/fd/d9/eaa1f80170d2b7c5ba23f3b59f766f3a0bb41155fbc32a69adfa1adaaef9/mcp-1.26.0-py3-none-any.whl", hash = "sha256:904a21c33c25aa98ddbeb47273033c435e595bbacfdb177f4bd87f6dceebe1ca", size = 233615, upload-time = "2026-01-24T19:40:30.652Z" },
+    { url = "https://files.pythonhosted.org/packages/c9/11/252c6f971dc4f16af1d98a1c469d8ba523aab00d1bb76b4d3bc1ff32eacc/mcp-1.27.2-py3-none-any.whl", hash = "sha256:d6ff5160c6ca65d93013626efb3fc249de683c30b2d8570755ceddd490344de5", size = 220498, upload-time = "2026-05-29T17:16:02.442Z" },
 ]
 
 [[package]]
@@ -477,7 +477,7 @@ dev = [
 [package.metadata]
 requires-dist = [
     { name = "anthropic", specifier = ">=0.87.0" },
-    { name = "mcp", specifier = ">=1.26.0" },
+    { name = "mcp", specifier = ">=1.27.2" },
     { name = "python-dotenv", specifier = ">=1.2.2" },
 ]
 
diff --git a/weather-server-python/uv.lock b/weather-server-python/uv.lock
index 3cd2fc98..aae07fcf 100644
--- a/weather-server-python/uv.lock
+++ b/weather-server-python/uv.lock
@@ -323,7 +323,7 @@ wheels = [
 
 [[package]]
 name = "mcp"
-version = "1.26.0"
+version = "1.27.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
@@ -341,9 +341,9 @@ dependencies = [
     { name = "typing-inspection" },
     { name = "uvicorn", marker = "sys_platform != 'emscripten'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/fc/6d/62e76bbb8144d6ed86e202b5edd8a4cb631e7c8130f3f4893c3f90262b10/mcp-1.26.0.tar.gz", hash = "sha256:db6e2ef491eecc1a0d93711a76f28dec2e05999f93afd48795da1c1137142c66", size = 608005, upload-time = "2026-01-24T19:40:32.468Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/27/3c/347cf965d313f5d41764e7d46bea6ffe7d9ef13b983cc429b0340962a082/mcp-1.27.2.tar.gz", hash = "sha256:8e02db104096d1c25b28e64bde29a5c32b31bc241710213e12fd4d84985bdfef", size = 621116, upload-time = "2026-05-29T17:16:04.039Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/fd/d9/eaa1f80170d2b7c5ba23f3b59f766f3a0bb41155fbc32a69adfa1adaaef9/mcp-1.26.0-py3-none-any.whl", hash = "sha256:904a21c33c25aa98ddbeb47273033c435e595bbacfdb177f4bd87f6dceebe1ca", size = 233615, upload-time = "2026-01-24T19:40:30.652Z" },
+    { url = "https://files.pythonhosted.org/packages/c9/11/252c6f971dc4f16af1d98a1c469d8ba523aab00d1bb76b4d3bc1ff32eacc/mcp-1.27.2-py3-none-any.whl", hash = "sha256:d6ff5160c6ca65d93013626efb3fc249de683c30b2d8570755ceddd490344de5", size = 220498, upload-time = "2026-05-29T17:16:02.442Z" },
 ]
 
 [package.optional-dependencies]