diff --git a/ci/images/ci-image-jdk11/Dockerfile b/ci/images/ci-image-jdk11/Dockerfile
index 8e6f7bdf..15ae6f50 100644
--- a/ci/images/ci-image-jdk11/Dockerfile
+++ b/ci/images/ci-image-jdk11/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:focal-20210217
+FROM ubuntu:focal-20210401
 
 ADD setup.sh /setup.sh
 ADD get-jdk-url.sh /get-jdk-url.sh
diff --git a/ci/images/ci-image-jdk16/Dockerfile b/ci/images/ci-image-jdk16/Dockerfile
index 17b65256..7a1fdf49 100644
--- a/ci/images/ci-image-jdk16/Dockerfile
+++ b/ci/images/ci-image-jdk16/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:focal-20210217
+FROM ubuntu:focal-20210401
 
 ADD setup.sh /setup.sh
 ADD get-jdk-url.sh /get-jdk-url.sh
diff --git a/ci/images/ci-image/Dockerfile b/ci/images/ci-image/Dockerfile
index 52e6c6cf..c825b290 100644
--- a/ci/images/ci-image/Dockerfile
+++ b/ci/images/ci-image/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:focal-20210217
+FROM ubuntu:focal-20210401
 
 ADD setup.sh /setup.sh
 ADD get-jdk-url.sh /get-jdk-url.sh