diff --git a/scripts/setup-elasticsearch.sh b/scripts/setup-elasticsearch.sh
index 13830e8..35af48b 100755
--- a/scripts/setup-elasticsearch.sh
+++ b/scripts/setup-elasticsearch.sh
@@ -37,6 +37,10 @@ if [[ -d /usr/share/elasticsearch/bin/x-pack ]]; then
             echo "CA directory exists, removing..."
             rm -rf /config/ssl/ca
         fi
+	echo "Install unzip if needed..."
+	if ! command -v unzip &>/dev/null; then
+	    yum -qy install unzip
+	fi
         echo "Unzip ca files..."
         unzip /config/ssl/docker-cluster-ca.zip -d /config/ssl