diff --git a/Retro68/multiversal/ppc-carbon/Dockerfile b/Retro68/multiversal/ppc-carbon/Dockerfile
index c83d9b6..d538d31 100644
--- a/Retro68/multiversal/ppc-carbon/Dockerfile
+++ b/Retro68/multiversal/ppc-carbon/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:latest
+FROM ubuntu:22.04
 
 LABEL description="Retro68 cross compiler environment with cmake alias for PowerPC and Carbon development."