diff --git a/docker-compose.yaml b/docker-compose.yaml
index d09d06d49..40b211756 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -40,7 +40,7 @@ services:
       context: .
       dockerfile: Dockerfile
       args:
-        PY_VER: ${PY_VER:-3.8}
+        PY_VER: ${PY_VER:-3.9}
         HOST_UID: ${HOST_UID:-1000}
     depends_on:
       db: