diff --git a/scripts/docker_start_all.sh b/scripts/docker_start_all.sh
index 0c0eab5ce..525216465 100755
--- a/scripts/docker_start_all.sh
+++ b/scripts/docker_start_all.sh
@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+#!/bin/bash
+
 # Include shell font styles and some basic information
 SCRIPTS_ROOT=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 OPENIM_ROOT=$(dirname "${BASH_SOURCE[0]}")/..