diff --git a/Retro68/multiversal/m68k/Dockerfile b/Retro68/multiversal/m68k/Dockerfile
index e1c5204..18f8f5b 100644
--- a/Retro68/multiversal/m68k/Dockerfile
+++ b/Retro68/multiversal/m68k/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:latest
+FROM ubuntu:20.04
 
 LABEL description="Retro68 cross compiler environment with cmake alias for m68k development."