diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 0af2ebed..2356271b 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -19,7 +19,7 @@ dependencies = [
     "langchain>=1.4.3",
     "langchain-classic>=1.0.8",
     "langchain-community>=0.4.2",
-    "langchain-google-community[vertexaisearch]>=5.1.0",
+    "langchain-google-community[vertexaisearch]>=5.1.1",
     "langchain-google-genai>=4.4.0",
     "langchain-google-vertexai>=3.2.4",
     "langchain-huggingface>=1.2.2",
diff --git a/backend/uv.lock b/backend/uv.lock
index dda39f51..6b78076c 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -440,7 +440,7 @@ requires-dist = [
     { name = "langchain", specifier = ">=1.4.3" },
     { name = "langchain-classic", specifier = ">=1.0.8" },
     { name = "langchain-community", specifier = ">=0.4.2" },
-    { name = "langchain-google-community", extras = ["vertexaisearch"], specifier = ">=5.1.0" },
+    { name = "langchain-google-community", extras = ["vertexaisearch"], specifier = ">=5.1.1" },
     { name = "langchain-google-genai", specifier = ">=4.4.0" },
     { name = "langchain-google-vertexai", specifier = ">=3.2.4" },
     { name = "langchain-huggingface", specifier = ">=1.2.2" },
@@ -2007,7 +2007,7 @@ wheels = [
 
 [[package]]
 name = "langchain-google-community"
-version = "5.1.0"
+version = "5.1.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "aiohttp" },
@@ -2022,9 +2022,9 @@ dependencies = [
     { name = "numpy" },
     { name = "requests" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/8e/3f/af9740629023c3a6d07541ec33c7a493fab67d7a05750566b0775a6ef64c/langchain_google_community-5.1.0.tar.gz", hash = "sha256:362584aa1ba1f38996c8010f5d9b5a164f6eef217e6d9a4508bf3bad29d33b26", size = 1005436, upload-time = "2026-10-01T19:59:53.018Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/22/23/1f99f48042829db15059fbf5f7bc1025e76a18dad2f5155e634d2d2c1b65/langchain_google_community-5.1.1.tar.gz", hash = "sha256:955e04f031146dc98d0ddc84a225e05ebecde9b2d28b56ed576f49dacfa71f95", size = 1007314, upload-time = "2026-10-05T15:29:41.355Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/70/56/eab76f9b2cecba053ebd83982e816095ff37b004f7293ac14e23506e93b3/langchain_google_community-5.1.0-py3-none-any.whl", hash = "sha256:176c932362e3a6317495d6e9be1542baa87049fe87ed6e6452c0d091f92d47ab", size = 168910, upload-time = "2026-10-01T19:59:51.843Z" },
+    { url = "https://files.pythonhosted.org/packages/7e/d1/b3ee1285218c6ba5b950b539b861c42ecb43f983649688093d99dbb22314/langchain_google_community-5.1.1-py3-none-any.whl", hash = "sha256:6cac79775cddff58636a000ad7fc898239c4b46fa3cf1691caaebab6064963b9", size = 169225, upload-time = "2026-10-05T15:29:39.657Z" },
 ]
 
 [package.optional-dependencies]