diff --git a/pkg/migrations/types.go b/pkg/migrations/types.go
index 106d45a1..4d4214ea 100644
--- a/pkg/migrations/types.go
+++ b/pkg/migrations/types.go
@@ -192,9 +192,13 @@ type PgRollMigration struct {
 	Name string `json:"name"`
 
 	// Operations corresponds to the JSON schema field "operations".
-	Operations []interface{} `json:"operations"`
+	Operations PgRollOperations `json:"operations"`
 }
 
+type PgRollOperation interface{}
+
+type PgRollOperations []interface{}
+
 // Replica identity definition
 type ReplicaIdentity struct {
 	// Name of the index to use as replica identity