diff --git a/requirements.txt b/requirements.txt
index a8b211fa..e7d731a4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 # Runtime dependencies (production install).
 # Dev/test-only tools live in requirements.dev.txt.
-anthropic>=0.18.0
+anthropic>=0.116.0
 openai>=1.0.0
 python-dotenv>=1.0.0
 rich>=13.0.0