diff --git a/ci/images/spring-boot-ci-image/Dockerfile b/ci/images/spring-boot-ci-image/Dockerfile
index d56672b2698..390dddd43f2 100644
--- a/ci/images/spring-boot-ci-image/Dockerfile
+++ b/ci/images/spring-boot-ci-image/Dockerfile
@@ -1,4 +1,5 @@
-FROM openjdk:8u181-jdk
+# 1.8.0_181-8u181-b13-1~deb9u1-b13
+FROM openjdk@sha256:1b842a215cf3437c9197f0f47e5c1a12f0a27aed27b84536ee3d8ef6b9b7e19e
 
 RUN apt-get update && \
     apt-get install -y git && \
diff --git a/ci/images/spring-boot-jdk11-ci-image/Dockerfile b/ci/images/spring-boot-jdk11-ci-image/Dockerfile
index b5535ef4f7b..a9776fa223b 100644
--- a/ci/images/spring-boot-jdk11-ci-image/Dockerfile
+++ b/ci/images/spring-boot-jdk11-ci-image/Dockerfile
@@ -1,4 +1,5 @@
-FROM openjdk:11.0.1-jdk
+# 11.0.1+13-Debian-2
+FROM openjdk@sha256:4b6ed15fe162c6209c7fa5cfa4d5fdfdc639d99d76998114e4fc790cda098f66
 
 RUN apt-get update && \
     apt-get install -y git && \