diff --git a/pyproject.toml b/pyproject.toml
index b9d4251..4cc9080 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ readme = "README.md"
 license = { text = "MIT" }
 requires-python = ">=3.9"
 dependencies = [
-    "anthropic>=0.34.2",
+    "langchain-anthropic>=0.2.0",
     "langgraph>=0.2.6",
     "python-dotenv>=1.0.1",
 ]