diff --git a/.travis.yml b/.travis.yml
index 7e9721b..cd14def 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: go
 go:
-- 1.9
+- 1.10.2
 before_install:
 - sudo pip install codecov
 install:
diff --git a/Makefile b/Makefile
index cbddea1..2a1e304 100644
--- a/Makefile
+++ b/Makefile
@@ -12,10 +12,4 @@ test:
 		go test -v ./...
 
 cover:
-		go test -v -coverprofile=coverage.txt -covermode=count ./appstore
-		go test -v -coverprofile=playstore.txt -covermode=count ./playstore
-		cat playstore.txt | grep -v "mode: count" >> coverage.txt
-		rm playstore.txt
-		go test -v -coverprofile=amazon.txt -covermode=count ./amazon
-		cat amazon.txt | grep -v "mode: count" >> coverage.txt
-		rm amazon.txt
+		go test -coverprofile=coverage.txt ./...
diff --git a/README.md b/README.md
index 4452db3..52a8b14 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 go-iap
 ======
 
-![](https://img.shields.io/badge/golang-1.9-blue.svg?style=flat)
+![](https://img.shields.io/badge/golang-1.10-blue.svg?style=flat)
 [![Build Status](https://travis-ci.org/awa/go-iap.svg?branch=master)](https://travis-ci.org/awa/go-iap)
 [![codecov.io](https://codecov.io/github/awa/go-iap/coverage.svg?branch=master)](https://codecov.io/github/awa/go-iap?branch=master)