diff --git a/Dockerfile b/Dockerfile
index 2032d2a..5a8e7fe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.04
+FROM ubuntu:24.04@sha256:7c06e91f61fa88c08cc74f7e1b7c69ae24910d745357e0dfe1d2c0322aaf20f9
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]