diff --git a/docker-compose.yml b/docker-compose.yml
index 7190e8f7..176e6752 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -90,7 +90,7 @@ services:
 
   postserve:
     image: "openmaptiles/openmaptiles-tools:${TOOLS_VERSION}"
-    command: "postserve ${TILESET_FILE} --verbose --serve=${OMT_HOST:-localhost}:${PPORT:-8090}"
+    command: "postserve ${TILESET_FILE} --verbose --serve=${OMT_HOST:-http://localhost}:${PPORT:-8090}"
     env_file: .env
     environment:
       TILESET_FILE: ${TILESET_FILE}