diff --git a/docker/aeternity.yaml b/docker/aeternity.yaml
index 3998a1e2de..0d124fbb9e 100644
--- a/docker/aeternity.yaml
+++ b/docker/aeternity.yaml
@@ -21,4 +21,4 @@ chain:
   persist: false
   hard_forks:
     "1": 0
-    "6": 1
+    "5": 1