diff --git a/deploy/monai-deploy-express/docker-compose.yml b/deploy/monai-deploy-express/docker-compose.yml
index 788ee54..a84a385 100644
--- a/deploy/monai-deploy-express/docker-compose.yml
+++ b/deploy/monai-deploy-express/docker-compose.yml
@@ -12,8 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-version: "3.9"
-
 services:
   minio:
     image: $MINIO_IMAGE