diff --git a/sql/upgrades/161.sql b/sql/upgrades/161.sql
--- a/sql/upgrades/161.sql
+++ b/sql/upgrades/161.sql
@@ -9,7 +9,7 @@
 
 
 update revision
-    set extra_headers = ARRAY[][]
+    set extra_headers = ARRAY[]::bytea[][]
     where extra_headers is null;