diff --git a/docker/base/Dockerfile b/docker/base/Dockerfile
index 60e18e5..572a50e 100644
--- a/docker/base/Dockerfile
+++ b/docker/base/Dockerfile
@@ -1,4 +1,5 @@
-FROM riju:ubuntu
+# EOL: April 2027
+FROM ubuntu:22.04
 
 COPY docker/base/install.bash /tmp/
 RUN /tmp/install.bash
diff --git a/docker/packaging/Dockerfile b/docker/packaging/Dockerfile
index ba528b1..96e0aa9 100644
--- a/docker/packaging/Dockerfile
+++ b/docker/packaging/Dockerfile
@@ -1,4 +1,5 @@
-FROM riju:ubuntu
+# EOL: April 2027
+FROM ubuntu:22.04
 
 COPY docker/packaging/install.bash /tmp/
 RUN /tmp/install.bash
diff --git a/docker/runtime/Dockerfile b/docker/runtime/Dockerfile
index e659167..b8f7373 100644
--- a/docker/runtime/Dockerfile
+++ b/docker/runtime/Dockerfile
@@ -1,4 +1,5 @@
-FROM riju:ubuntu
+# EOL: April 2027
+FROM ubuntu:22.04
 
 COPY docker/runtime/install.bash /tmp/
 RUN /tmp/install.bash