diff --git a/README.md b/README.md
index 0322088..0e194a8 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [![Go Report Card](https://goreportcard.com/badge/github.com/qurami/casbin-cloud-storage-adapter)](https://goreportcard.com/report/github.com/qurami/casbin-cloud-storage-adapter)
 [![Build Status](https://travis-ci.com/casbin/casbin.svg?branch=master)](https://travis-ci.com/casbin/casbin)
-[![Coverage Status](https://coveralls.io/repos/github.com/qurami/casbin-cloud-storage-adapter/badge.svg?branch=master)](https://coveralls.io/github.com/qurami/casbin-cloud-storage-adapter?branch=master)
+[![Coverage Status](https://coveralls.io/repos/github/qurami/casbin-cloud-storage-adapter/badge.svg)](https://coveralls.io/github/qurami/casbin-cloud-storage-adapter)
 [![Godoc](https://godoc.org/github.com/qurami/casbin-cloud-storage-adapter?status.svg)](https://pkg.go.dev/github.com/qurami/casbin-cloud-storage-adapter/v1)
 
 ---
@@ -27,7 +27,7 @@ import (
 
 	"cloud.google.com/go/storage"
 	"github.com/casbin/casbin/v2"
-	cloudstorageadapter "github.com/qurami/casbin-cloud-storage-adapter/v1"
+	cloudstorageadapter "github.com/qurami/casbin-cloud-storage-adapter"
 )
 
 func main() {
diff --git a/adapter_test.go b/adapter_test.go
index 7a2c2bd..59d0f48 100644
--- a/adapter_test.go
+++ b/adapter_test.go
@@ -8,7 +8,7 @@ import (
 	"sync"
 	"testing"
 
-	casbin "github.com/casbin/casbin/v2"
+	"github.com/casbin/casbin/v2"
 	"github.com/casbin/casbin/v2/model"
 	"github.com/fsouza/fake-gcs-server/fakestorage"
 )
diff --git a/examples/main.go b/examples/main.go
index aa2c004..ea71214 100644
--- a/examples/main.go
+++ b/examples/main.go
@@ -6,7 +6,7 @@ import (
 
 	"cloud.google.com/go/storage"
 	"github.com/casbin/casbin/v2"
-	cloudstorageadapter "github.com/qurami/casbin-cloud-storage-adapter/v1"
+	cloudstorageadapter "github.com/qurami/casbin-cloud-storage-adapter"
 )
 
 func main() {
diff --git a/go.mod b/go.mod
index 4b50f09..1a1b73f 100644
--- a/go.mod
+++ b/go.mod
@@ -1,4 +1,4 @@
-module github.com/qurami/casbin-cloud-storage-adapter/v1
+module github.com/qurami/casbin-cloud-storage-adapter
 
 go 1.14
 
diff --git a/go.sum b/go.sum
index 9afeea5..8970439 100644
--- a/go.sum
+++ b/go.sum
@@ -43,7 +43,6 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible h1:1G1pk05UrOh0NlF1oeaaix1x8XzrfjIDK47TY0Zehcw=
 github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
-github.com/casbin/casbin v1.9.1 h1:ucjbS5zTrmSLtH4XogqOG920Poe6QatdXtz1FEbApeM=
 github.com/casbin/casbin/v2 v2.25.5 h1:TPKaoGu1gqAVJtQ2MaTfdHn2zgnCaulLylbNXbY6TYo=
 github.com/casbin/casbin/v2 v2.25.5/go.mod h1:wUgota0cQbTXE6Vd+KWpg41726jFRi7upxio0sR+Xd0=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
@@ -81,6 +80,7 @@ github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt
 github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
 github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
 github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
+github.com/golang/mock v1.5.0 h1:jlYHihg//f7RRwuPfptm04yp4s7O6Kw8EZiVYIGcH0g=
 github.com/golang/mock v1.5.0/go.mod h1:CWnOUgYIOo4TcNZ0wHX3YZCqsaM1I1Jvs6v3mP3KVu8=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
@@ -109,9 +109,12 @@ github.com/google/go-cmp v0.5.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.3/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/martian v2.1.0+incompatible h1:/CP5g8u/VJHijgedC/Legn3BAbAaWPgecwXBIDzw5no=
 github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
 github.com/google/martian/v3 v3.0.0/go.mod h1:y5Zk1BBys9G+gd6Jrk0W3cC1+ELVxBWuIGO+w/tUAp0=
+github.com/google/martian/v3 v3.1.0 h1:wCKgOCHuUEVfsaQLpPSJb7VdYCdTVZQAuOdYm1yc/60=
 github.com/google/martian/v3 v3.1.0/go.mod h1:y5Zk1BBys9G+gd6Jrk0W3cC1+ELVxBWuIGO+w/tUAp0=
 github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
 github.com/google/pprof v0.0.0-20190515194954-54271f7e092f/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=