diff --git a/go.mod b/go.mod
index 181cdd4..5285db3 100644
--- a/go.mod
+++ b/go.mod
@@ -1,14 +1,10 @@
 module github.com/romdo/gomockctx
 
-go 1.17
-
-require (
-	github.com/golang/mock v1.6.0
-	github.com/stretchr/testify v1.7.0
-)
+go 1.15
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/golang/mock v1.6.0
+	github.com/stretchr/testify v1.7.0
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )