diff --git a/dev/Containerfile b/dev/Containerfile
index fac2c80..cad074a 100644
--- a/dev/Containerfile
+++ b/dev/Containerfile
@@ -1,14 +1,14 @@
 # SPDX-FileCopyrightText: The devcontainer.java Authors
 # SPDX-License-Identifier: 0BSD
 
-FROM ghcr.io/graalvm/native-image-community:25
+FROM ghcr.io/graalvm/native-image-community:25@sha256:0d936f32bb8acb5bc60c41b33e05f064d7a6aaf36b726538296c54949bd4a3c0
 
 # Install Maven
 ENV MAVEN_HOME /usr/share/maven
 
-COPY --from=docker.io/library/maven:3-eclipse-temurin-21 ${MAVEN_HOME} ${MAVEN_HOME}
-COPY --from=docker.io/library/maven:3-eclipse-temurin-21 /usr/local/bin/mvn-entrypoint.sh /usr/local/bin/mvn-entrypoint.sh
-COPY --from=docker.io/library/maven:3-eclipse-temurin-21 /usr/share/maven/ref/settings-docker.xml /usr/share/maven/ref/settings-docker.xml
+COPY --from=docker.io/library/maven:3-eclipse-temurin-21@sha256:2b4496088e7b80ae10a8c9f74e574ea21380325a006ec684532ad6bad5bc7273 ${MAVEN_HOME} ${MAVEN_HOME}
+COPY --from=docker.io/library/maven:3-eclipse-temurin-21@sha256:2b4496088e7b80ae10a8c9f74e574ea21380325a006ec684532ad6bad5bc7273 /usr/local/bin/mvn-entrypoint.sh /usr/local/bin/mvn-entrypoint.sh
+COPY --from=docker.io/library/maven:3-eclipse-temurin-21@sha256:2b4496088e7b80ae10a8c9f74e574ea21380325a006ec684532ad6bad5bc7273 /usr/share/maven/ref/settings-docker.xml /usr/share/maven/ref/settings-docker.xml
 
 RUN ln -s ${MAVEN_HOME}/bin/mvn /usr/bin/mvn