diff --git a/docker/app/Dockerfile b/docker/app/Dockerfile
index c9d8ebc..7e919a0 100644
--- a/docker/app/Dockerfile
+++ b/docker/app/Dockerfile
@@ -1,5 +1,5 @@
-# temporary hack
-FROM ubuntu:20.04 AS build
+# EOL: April 2027
+FROM ubuntu:22.04 AS build
 
 COPY docker/app/install-build.bash /tmp/
 RUN /tmp/install-build.bash