diff --git a/util/docker/coreboot-sdk/Dockerfile b/util/docker/coreboot-sdk/Dockerfile
index 6c3a06b571..59013d6ac1 100644
--- a/util/docker/coreboot-sdk/Dockerfile
+++ b/util/docker/coreboot-sdk/Dockerfile
@@ -90,7 +90,8 @@ RUN \
 		xfonts-unifont \
 		xz-utils \
 		zlib1g-dev \
-	&& apt-get clean
+	&& apt-get clean \
+	&& rm -rf /var/lib/apt/lists/*
 
 RUN \
 	cd /tmp && \