diff --git a/Dockerfile b/Dockerfile
index 4c47c4d..9d14628 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -38,7 +38,7 @@ RUN \
         /curlout/etc/ssl/certs/ca-certificates.crt
 
 # final mod layer
-FROM ubuntu:mantic
+FROM ubuntu:mantic-20240405
 
 # environment settings
 ARG DEBIAN_FRONTEND="noninteractive"