diff --git a/Dockerfile b/Dockerfile
index bc0ffc5..d17c327 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,7 +12,7 @@ RUN set -ex; \
     cd /build; \
     make build;
 
-FROM debian:bullseye-slim@sha256:0e75382930ceb533e2f438071307708e79dc86d9b8e433cc6dd1a96872f2651d
+FROM debian:bullseye-slim@sha256:4e9b634e893784ba341cb177e5c58afebd7e8be7675a9c4d530b5e39c30235bd
 
 COPY --from=build /build/bin/signaling /usr/local/bin/signaling
 COPY --from=build /build/server.conf.in /config/server.conf