diff --git a/shellcheck/Dockerfile b/shellcheck/Dockerfile
index 63089bf..36fd4fe 100644
--- a/shellcheck/Dockerfile
+++ b/shellcheck/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:stretch-slim
+FROM debian:bullseye-slim
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \