diff --git a/go.mod b/go.mod
index 3f9168c..5fadc95 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.16
 
 require (
 	github.com/antlr/antlr4/runtime/Go/antlr v0.0.0-20210521073959-f0d4d129b7f1
-	github.com/golang/mock v1.6.0
+	github.com/golang/mock v1.5.0
 	github.com/google/uuid v1.2.0
 	github.com/hashicorp/golang-lru v0.5.4
 	github.com/mr-tron/base58 v1.2.0
diff --git a/go.sum b/go.sum
index 3f8c8ae..b7fdca3 100644
Binary files a/go.sum and b/go.sum differ