diff --git a/swarm/kopia.yaml b/swarm/kopia.yaml
index f64a7b0..7ac7734 100644
--- a/swarm/kopia.yaml
+++ b/swarm/kopia.yaml
@@ -4,7 +4,7 @@ services:
     container_name: kopia
     hostname: kopia
     restart: unless-stopped
-    user: "1964.1964"
+    user: "1964:1964"
     ports:
       -  51515:51515
     environment: