diff --git a/docker-compose.yml b/docker-compose.yml
index 9f9ce09..c1bf3ce 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -14,8 +14,6 @@
 #You should have received a copy of the GNU Affero General Public License
 #along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-version: "3.9"
-
 services:
   htwkalender-backend:
     build: