diff --git a/pyproject.toml b/pyproject.toml
index a31d216..36021eb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ dependencies = [
     "mss>=9.0",
     "anthropic>=0.40",
     "openai>=1.0",
-    "backoff>=2.0",
+    "backoff>=2.2.1",
 ]
 
 [project.optional-dependencies]