diff --git a/base.Dockerfile b/base.Dockerfile
index 6a970af..4144613 100644
--- a/base.Dockerfile
+++ b/base.Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:21.04
+FROM ubuntu:hirsute-20220113
 
 #ARG rpcemu_version=0.9.3