diff --git a/ci-scripts/docker/docker_build.sh b/ci-scripts/docker/docker_build.sh
index 2f6d68710..747acb867 100755
--- a/ci-scripts/docker/docker_build.sh
+++ b/ci-scripts/docker/docker_build.sh
@@ -36,6 +36,7 @@ elif [[ $DOCKER_IMAGE == "quay.io/pypa/manylinux1_i686" ]]; then
 fi
 echo $PATH
 export CCACHE_DIR="/io/ccache"
+ccache -M 5 G  # set cache size to 5 G
 
 # Download proper auditwheel program
 git clone https://github.com/thomaslima/auditwheel.git /tmp/auditwheel
@@ -45,7 +46,6 @@ AUDITWHEEL_PYTHON=$(cat `which auditwheel` | head -1 | sed -e 's/#!\(.*\)/\1/')
 # Install auditwheel, replacing the system's auditwheel binary
 $AUDITWHEEL_PYTHON -m pip install .
 
-
 # Show ccache stats
 echo "Cache stats:"
 ccache -s