diff --git a/apps/kopia/docker-compose.json b/apps/kopia/docker-compose.json
index 436555c..a819978 100644
--- a/apps/kopia/docker-compose.json
+++ b/apps/kopia/docker-compose.json
@@ -21,7 +21,7 @@
         },
         {
           "key": "KOPIA_SERVER_FINGERPRINT",
-          "value": "KOPIA_SERVER_FINGERPRINT"
+          "value": "${KOPIA_SERVER_FINGERPRINT}"
         },
         {
           "key": "TZ",