diff --git a/relay/docker-compose.yml b/relay/docker-compose.yml
index eba504a5..0f44d9a4 100644
--- a/relay/docker-compose.yml
+++ b/relay/docker-compose.yml
@@ -6,7 +6,7 @@ services:
   #
   relay:
     # Pegged charon version (update this for each release).
-    image: obolnetwork/charon:${CHARON_VERSION:-v1.8.2}
+    image: obolnetwork/charon:${CHARON_VERSION:-v1.9.1}
     environment:
       CHARON_P2P_TCP_ADDRESS: 0.0.0.0:3610
       CHARON_HTTP_ADDRESS: 0.0.0.0:3640