diff --git a/pyproject.toml b/pyproject.toml
index db7a72a..849ad31 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ requires-python = "==3.13.*"
 dependencies = [
     "fastmcp>=3.2.4",
     "debugpy>=1.8.0",
-    "langchain-core>=1.2.26",
+    "langchain-core>=1.2.28",
     "mcp>=1.3.0",
     "azure-identity>=1.25.1",
     "msgraph-sdk>=1.0.0",
diff --git a/uv.lock b/uv.lock
index 920d817..f079f05 100644
--- a/uv.lock
+++ b/uv.lock
@@ -938,7 +938,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.2.26"
+version = "1.2.28"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jsonpatch" },
@@ -950,9 +950,9 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "uuid-utils" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/8c/b0/30ed29e5820580bc13d70b1f8a212b4fe0609a9737164ed1a90167941ca2/langchain_core-1.2.26.tar.gz", hash = "sha256:ba025ec70e19b56467f46b9109de19d30d169d328a174986b353cb23fd0ff0fe", size = 844795, upload-time = "2026-04-03T23:30:32.567Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/f8/a4/317a1a3ac1df33a64adb3670bf88bbe3b3d5baa274db6863a979db472897/langchain_core-1.2.28.tar.gz", hash = "sha256:271a3d8bd618f795fdeba112b0753980457fc90537c46a0c11998516a74dc2cb", size = 846119, upload-time = "2026-04-08T18:19:34.867Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/e5/8b/c184205a52b37a4a3166b3567323495701929b1dbfd528e5ba1df62bd404/langchain_core-1.2.26-py3-none-any.whl", hash = "sha256:3d0a3913dff77a930b017a05afe979e4959d27bec0c77ee51f9a100754510509", size = 508298, upload-time = "2026-04-03T23:30:30.253Z" },
+    { url = "https://files.pythonhosted.org/packages/a8/92/32f785f077c7e898da97064f113c73fbd9ad55d1e2169cf3a391b183dedb/langchain_core-1.2.28-py3-none-any.whl", hash = "sha256:80764232581eaf8057bcefa71dbf8adc1f6a28d257ebd8b95ba9b8b452e8c6ac", size = 508727, upload-time = "2026-04-08T18:19:32.823Z" },
 ]
 
 [[package]]
@@ -2049,7 +2049,7 @@ requires-dist = [
     { name = "dotenv-azd", specifier = ">=0.1.0" },
     { name = "fastmcp", specifier = ">=3.2.4" },
     { name = "langchain", specifier = ">=1.2.15" },
-    { name = "langchain-core", specifier = ">=1.2.26" },
+    { name = "langchain-core", specifier = ">=1.2.28" },
     { name = "langchain-mcp-adapters", specifier = ">=0.2.2" },
     { name = "langchain-openai", specifier = ">=1.1.12" },
     { name = "logfire", specifier = ">=4.15.1" },