diff --git a/pyproject.toml b/pyproject.toml
index 15255ff..088193b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -73,7 +73,7 @@ ml = [
 # runtime in offline mode (the offline guard rejects cloud providers
 # before any SDK call).
 llm-openai = ["openai>=2.36.0"]
-llm-anthropic = ["anthropic>=0.100.0"]
+llm-anthropic = ["anthropic>=0.104.1"]
 # google-generativeai is upstream-deprecated in favor of google-genai.
 # The provider plugin imports either SDK (preferring google.genai) so
 # operators can migrate without code change. Floor stays on the