diff --git a/runtimes/7.4/Dockerfile b/runtimes/7.4/Dockerfile
index 6398754f..00ebddb6 100644
--- a/runtimes/7.4/Dockerfile
+++ b/runtimes/7.4/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:20.04
+FROM ubuntu:21.04
 
 LABEL maintainer="Taylor Otwell"
 
diff --git a/runtimes/8.0/Dockerfile b/runtimes/8.0/Dockerfile
index 6f5daa5b..164d0742 100644
--- a/runtimes/8.0/Dockerfile
+++ b/runtimes/8.0/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:20.04
+FROM ubuntu:21.04
 
 LABEL maintainer="Taylor Otwell"