diff --git a/README.md b/README.md
index fbfb95b..3b80d7d 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 
 > Bitbucket-API library for golang.
 
-Support Bitbucket API v2.0. 
+Support Bitbucket API v2.0.
 
 And the response type is json format defined Bitbucket API.
 
@@ -26,7 +26,7 @@ package main
 import (
         "fmt"
 
-        "github.com/ktrysmt/go-bitbucket" 
+        "github.com/ktrysmt/go-bitbucket"
 )
 
 func main() {
@@ -47,7 +47,7 @@ func main() {
                 panic(err)
         }
 
-        fmt.Println(res) 
+        fmt.Println(res)
 }
 ```
 
@@ -59,21 +59,19 @@ It does not correspond yet. Because there are many differences between v2.0 and
 
 - Bitbucket API v1.0 <https://confluence.atlassian.com/bitbucket/version-1-423626337.html>
 
-It is officially recommended to use v2.0.  
-But unfortunately Bitbucket Server (formerly: Stash) API is still v1.0.   
+It is officially recommended to use v2.0.
+But unfortunately Bitbucket Server (formerly: Stash) API is still v1.0.
 And The API v1.0 covers resources that the v2.0 API and API v2.0 is yet to cover.
 
 ## Development
 
 ### Install dependencies
 
-It's using dep.
+It's using `go mod`.
 
 ```sh
-go get github.com/golang/dep/...
-git clone https://github.com/ktrysmt/go-bitbucket 
-cd ./go-bitbucket
-dep ensure 
+export GO111MODULE=auto # or, =on
+go build
 ```
 
 ### How to testing
@@ -81,13 +79,13 @@ dep ensure
 Set your available user account to Global Env.
 
 ```sh
-export BITBUCKET_TEST_USERNAME=<your_username> 
-export BITBUCKET_TEST_PASSWORD=<your_password> 
-export BITBUCKET_TEST_OWNER=<your_repo_owner>  
+export BITBUCKET_TEST_USERNAME=<your_username>
+export BITBUCKET_TEST_PASSWORD=<your_password>
+export BITBUCKET_TEST_OWNER=<your_repo_owner>
 export BITBUCKET_TEST_REPOSLUG=<your_repo_name>
 ```
 
-Refs; URL Syntax is `https://<your_username>:<your_password>@bitbucket.org/<your_repo_owner>/<your_repo_name>.git`. 
+Refs; URL Syntax is `https://<your_username>:<your_password>@bitbucket.org/<your_repo_owner>/<your_repo_name>.git`.
 
 And just run,
 
diff --git a/go.mod b/go.mod
index 5931817..0371991 100644
--- a/go.mod
+++ b/go.mod
@@ -3,13 +3,15 @@ module github.com/ktrysmt/go-bitbucket
 go 1.12
 
 require (
-	github.com/golang/protobuf v1.0.0
+	github.com/golang/protobuf v1.0.0 // indirect
+	github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88 // indirect
 	github.com/k0kubun/pp v2.3.0+incompatible
-	github.com/mattn/go-colorable v0.0.9
-	github.com/mattn/go-isatty v0.0.3
+	github.com/mattn/go-colorable v0.0.9 // indirect
+	github.com/mattn/go-isatty v0.0.3 // indirect
 	github.com/mitchellh/mapstructure v0.0.0-20180220230111-00c29f56e238
 	golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01
 	golang.org/x/oauth2 v0.0.0-20180227000427-d7d64896b5ff
-	golang.org/x/sys v0.0.0-20180224232135-f6cff0780e54
-	google.golang.org/appengine v1.0.0
+	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e // indirect
+	golang.org/x/sys v0.0.0-20180224232135-f6cff0780e54 // indirect
+	google.golang.org/appengine v1.0.0 // indirect
 )
diff --git a/go.sum b/go.sum
index be29874..5f67b58 100644
--- a/go.sum
+++ b/go.sum
@@ -1,9 +1,22 @@
+github.com/golang/protobuf v1.0.0 h1:lsek0oXi8iFE9L+EXARyHIjU5rlWIhhTkjDz3vHhWWQ=
 github.com/golang/protobuf v1.0.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88 h1:uC1QfSlInpQF+M0ao65imhwqKnz3Q2z/d8PWZRMQvDM=
+github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88/go.mod h1:3w7q1U84EfirKl04SVQ/s7nPm1ZPhiXd34z40TNz36k=
+github.com/k0kubun/pp v2.3.0+incompatible h1:EKhKbi34VQDWJtq+zpsKSEhkHHs9w2P8Izbq8IhLVSo=
 github.com/k0kubun/pp v2.3.0+incompatible/go.mod h1:GWse8YhT0p8pT4ir3ZgBbfZild3tgzSScAn6HmfYukg=
+github.com/mattn/go-colorable v0.0.9 h1:UVL0vNpWh04HeJXV0KLcaT7r06gOH2l4OW6ddYRUIY4=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
+github.com/mattn/go-isatty v0.0.3 h1:ns/ykhmWi7G9O+8a448SecJU3nSMBXJfqQkl0upE1jI=
 github.com/mattn/go-isatty v0.0.3/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
+github.com/mitchellh/mapstructure v0.0.0-20180220230111-00c29f56e238 h1:+MZW2uvHgN8kYvksEN3f7eFL2wpzk0GxmlFsMybWc7E=
 github.com/mitchellh/mapstructure v0.0.0-20180220230111-00c29f56e238/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
+golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01 h1:po1f06KS05FvIQQA2pMuOWZAUXiy1KYdIf0ElUU2Hhc=
 golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/oauth2 v0.0.0-20180227000427-d7d64896b5ff h1:WbI0V2v8RZPTlOMrecBqqba3029Z6l7jeFySSGaN/jk=
 golang.org/x/oauth2 v0.0.0-20180227000427-d7d64896b5ff/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
+golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e h1:vcxGaoTs7kV8m5Np9uUNQin4BrLOthgV7252N8V+FwY=
+golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20180224232135-f6cff0780e54 h1:4qAtdeqGYyXU2CfUvLomEFw0cl5IxNxmEhXL52ODpiU=
 golang.org/x/sys v0.0.0-20180224232135-f6cff0780e54/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+google.golang.org/appengine v1.0.0 h1:dN4LljjBKVChsv0XCSI+zbyzdqrkEwX5LQFUMRSGqOc=
 google.golang.org/appengine v1.0.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=