diff --git a/requirements.txt b/requirements.txt
index e0289e7..38ecf5c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-anthropic>=0.84
+anthropic>=0.120.0
 # openai is a soft dependency: install it only if you set
 # BENCH_PROVIDER=openrouter (see utils/api.py).