diff --git a/.circleci/script/docker b/.circleci/script/docker
index d7410e0a..d692f7b3 100755
--- a/.circleci/script/docker
+++ b/.circleci/script/docker
@@ -17,7 +17,7 @@ fi
 if [ -z "$CIRCLE_PULL_REQUEST" ] && [ "$CIRCLE_BRANCH" = "master" ]; then
     echo "Building Docker image $image_name:$image_tag"
     echo "$DOCKERHUB_PASS" | docker login -u "$DOCKERHUB_USER" --password-stdin
-    docker build -t "$image_name" --build-arg BABASHKA_XMX="-J-Xmx6900m" .
+    docker build -t "$image_name" --build-arg BABASHKA_XMX="-J-Xmx6500m" .
     docker tag "$image_name:$latest_tag" "$image_name:$image_tag"
     # we only update latest when it's not a SNAPSHOT version
     if [ "false" = "$snapshot" ]; then