diff --git a/pyproject.toml b/pyproject.toml
index 28550d9..4a93435 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ version = "0.2.0"
 requires-python = ">=3.11"
 dependencies = [
     "pydantic>=2.13.4",
-    "anthropic>=0.102.0,<1",
+    "anthropic>=1.2.0,<2",
     "click>=8.3.3",
     "rich>=15.0.0",
     "pytest>=9.1.1",