diff --git a/services/challenge-validator/requirements.txt b/services/challenge-validator/requirements.txt
index 69b5e1e..584c34e 100644
--- a/services/challenge-validator/requirements.txt
+++ b/services/challenge-validator/requirements.txt
@@ -3,4 +3,4 @@ uvicorn[standard]==0.24.0
 pydantic==2.5.0
 redis==5.0.1
 pyyaml==6.0.1
-prometheus-client==0.19.0
+prometheus-client==0.25.0