diff --git a/Dockerfile b/Dockerfile
index 10999e3..f1c5d1d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM openjdk:8-jdk-slim-buster AS grails-builder
+FROM openjdk:8-jdk-slim-bullseye AS grails-builder
 
 ARG GRAILS_VERSION
 ENV GRAILS_VERSION=${GRAILS_VERSION:-2.5.6}
@@ -12,7 +12,7 @@ WORKDIR /build
 RUN curl --silent --remote-name --location https://github.com/grails/grails-core/releases/download/v$GRAILS_VERSION/grails-$GRAILS_VERSION.zip && \
 	unzip grails-$GRAILS_VERSION.zip
 
-FROM openjdk:8-jdk-slim-buster
+FROM openjdk:8-jdk-slim-bullseye
 RUN apt-get update && apt-get --assume-yes --no-install-recommends install \
 	git \
 	&& apt-get clean \