diff --git a/stacks/apps/peertube/stack.yml b/stacks/apps/peertube/stack.yml
index d643a83..8b2b0da 100644
--- a/stacks/apps/peertube/stack.yml
+++ b/stacks/apps/peertube/stack.yml
@@ -8,7 +8,7 @@ services:
     - POSTGRES_USER=admin
     - POSTGRES_PASSWORD_FILE=/run/secrets/postgres-master
     - POSTGRES_DB=peertube
-    - POSTGRES_HOSTNAME=10.0.4.10
+    - POSTGRES_HOST=10.0.4.10
     # Redis configuration
     - REDIS_HOSTNAME=peertube-redis
     # PeerTube configuration