diff --git a/a2a/reservation_service/pyproject.toml b/a2a/reservation_service/pyproject.toml
index 3247eec5..848113d1 100644
--- a/a2a/reservation_service/pyproject.toml
+++ b/a2a/reservation_service/pyproject.toml
@@ -13,7 +13,7 @@ dependencies = [
     "langgraph>=0.2.55",
     "langchain-core>=1.3.3",
     "langchain-community>=0.3.27",
-    "langchain-ollama>=0.2.1",
+    "langchain-ollama>=1.1.0",
     "langchain-openai>=0.3.7",
     "openinference-instrumentation-langchain>=0.1.65",
     "pydantic-settings>=2.14.1",
diff --git a/a2a/reservation_service/uv.lock b/a2a/reservation_service/uv.lock
index e80c7e87..40129c7f 100644
--- a/a2a/reservation_service/uv.lock
+++ b/a2a/reservation_service/uv.lock
@@ -1008,15 +1008,15 @@ wheels = [
 
 [[package]]
 name = "langchain-ollama"
-version = "1.0.0"
+version = "1.1.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "langchain-core" },
     { name = "ollama" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/8b/45/d996b4c0e3e7155ff7a110bf24dcb5043fc1405559a2089c11fe97511cc2/langchain_ollama-1.0.0.tar.gz", hash = "sha256:2ea9ad1b0f0ab319d600b9193d1124a8925523a3b943d75a967718e24ec09a8a", size = 151042, upload-time = "2025-10-17T15:41:50.277Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/d4/9b/6641afe8a5bf807e454fd464eddfc7eb2f2df53cb0b29744381171f9c609/langchain_ollama-1.1.0.tar.gz", hash = "sha256:f776f56f6782ae4da7692579b94a6575906118318d1023b455d7207f9d059811", size = 133075, upload-time = "2026-04-07T02:48:00.873Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/91/08/7be292aee722692b13a93316247b57eefb83d4309f5fdfe636cc47786efe/langchain_ollama-1.0.0-py3-none-any.whl", hash = "sha256:5828523fcbd137847490841110a6aedf96b68534e7fe2735715ecf3e835b2391", size = 29006, upload-time = "2025-10-17T15:41:49.497Z" },
+    { url = "https://files.pythonhosted.org/packages/2c/b2/c2acb076590a98bee2816ed5f285e00df162a34238f9e276e175e14ebc35/langchain_ollama-1.1.0-py3-none-any.whl", hash = "sha256:43ac83a6eacb0f43855810739794dd55019e0d9b17bdcf3ecb3b1991ac3b59dd", size = 31413, upload-time = "2026-04-07T02:47:59.642Z" },
 ]
 
 [[package]]
@@ -2264,7 +2264,7 @@ requires-dist = [
     { name = "langchain-community", specifier = ">=0.3.27" },
     { name = "langchain-core", specifier = ">=1.3.3" },
     { name = "langchain-mcp-adapters", specifier = ">=0.1.0" },
-    { name = "langchain-ollama", specifier = ">=0.2.1" },
+    { name = "langchain-ollama", specifier = ">=1.1.0" },
     { name = "langchain-openai", specifier = ">=0.3.7" },
     { name = "langgraph", specifier = ">=0.2.55" },
     { name = "openinference-instrumentation-langchain", specifier = ">=0.1.65" },