diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index ae4f7da69..0e5e2684c 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -32,7 +32,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.17
+          go-version: 1.16
 
       - name: Build
         run: go build ./...
diff --git a/cmd/kratos/go.mod b/cmd/kratos/go.mod
index 36b95552b..3cc09420f 100644
--- a/cmd/kratos/go.mod
+++ b/cmd/kratos/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/cmd/kratos/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/AlecAivazis/survey/v2 v2.2.15
diff --git a/cmd/protoc-gen-go-errors/go.mod b/cmd/protoc-gen-go-errors/go.mod
index 279eb9808..e578533f1 100644
--- a/cmd/protoc-gen-go-errors/go.mod
+++ b/cmd/protoc-gen-go-errors/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/cmd/protoc-gen-go-errors/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.0.3
diff --git a/cmd/protoc-gen-go-http/go.mod b/cmd/protoc-gen-go-http/go.mod
index 6b6c66241..99889cc98 100644
--- a/cmd/protoc-gen-go-http/go.mod
+++ b/cmd/protoc-gen-go-http/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/cmd/protoc-gen-go-http/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.0.3
diff --git a/config/env/env_test.go b/config/env/env_test.go
index 6ccf76d76..a63e88eea 100644
--- a/config/env/env_test.go
+++ b/config/env/env_test.go
@@ -55,7 +55,7 @@ func TestEnvWithPrefix(t *testing.T) {
 	}
 
 	for k, v := range envs {
-		t.Setenv(k, v)
+		os.Setenv(k, v)
 	}
 
 	c := config.New(config.WithSource(
@@ -161,7 +161,7 @@ func TestEnvWithoutPrefix(t *testing.T) {
 	}
 
 	for k, v := range envs {
-		t.Setenv(k, v)
+		os.Setenv(k, v)
 	}
 
 	c := config.New(config.WithSource(
diff --git a/contrib/config/apollo/go.mod b/contrib/config/apollo/go.mod
index 8cb6aef09..a1d31ed7a 100644
--- a/contrib/config/apollo/go.mod
+++ b/contrib/config/apollo/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/config/apollo/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/apolloconfig/agollo/v4 v4.0.8
diff --git a/contrib/config/etcd/go.mod b/contrib/config/etcd/go.mod
index b8c6ccc7f..2485da312 100644
--- a/contrib/config/etcd/go.mod
+++ b/contrib/config/etcd/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/config/etcd/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.0.0
diff --git a/contrib/config/kubernetes/go.mod b/contrib/config/kubernetes/go.mod
index b4612a1e0..21c65ac3b 100644
--- a/contrib/config/kubernetes/go.mod
+++ b/contrib/config/kubernetes/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/config/kubernetes/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.0.0
diff --git a/contrib/config/nacos/go.mod b/contrib/config/nacos/go.mod
index 28104d371..6d743f045 100644
--- a/contrib/config/nacos/go.mod
+++ b/contrib/config/nacos/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/config/nacos/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.0.0
diff --git a/contrib/log/fluent/go.mod b/contrib/log/fluent/go.mod
index 8c898cce3..120551ffb 100644
--- a/contrib/log/fluent/go.mod
+++ b/contrib/log/fluent/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/log/fluent/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
diff --git a/contrib/log/zap/go.mod b/contrib/log/zap/go.mod
index 71abb53a4..a44838fac 100644
--- a/contrib/log/zap/go.mod
+++ b/contrib/log/zap/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/log/zap/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.0.5
diff --git a/contrib/metrics/datadog/go.mod b/contrib/metrics/datadog/go.mod
index f7baa7584..935deb68f 100644
--- a/contrib/metrics/datadog/go.mod
+++ b/contrib/metrics/datadog/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/metrics/datadog/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/DataDog/datadog-go v4.8.1+incompatible
diff --git a/contrib/metrics/prometheus/go.mod b/contrib/metrics/prometheus/go.mod
index 8f5eca4de..3408f8246 100644
--- a/contrib/metrics/prometheus/go.mod
+++ b/contrib/metrics/prometheus/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/metrics/prometheus/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.0.0
diff --git a/contrib/registry/consul/go.mod b/contrib/registry/consul/go.mod
index ea8979902..1a55f9d57 100644
--- a/contrib/registry/consul/go.mod
+++ b/contrib/registry/consul/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/registry/consul/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.0.0
diff --git a/contrib/registry/etcd/go.mod b/contrib/registry/etcd/go.mod
index 63059c3e3..8c7004957 100644
--- a/contrib/registry/etcd/go.mod
+++ b/contrib/registry/etcd/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/registry/etcd/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.0.0
diff --git a/contrib/registry/kubernetes/go.mod b/contrib/registry/kubernetes/go.mod
index 98631db63..0693c9c45 100644
--- a/contrib/registry/kubernetes/go.mod
+++ b/contrib/registry/kubernetes/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/registry/kubernetes/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.0.0
diff --git a/contrib/registry/nacos/go.mod b/contrib/registry/nacos/go.mod
index e11e455b6..a30714553 100644
--- a/contrib/registry/nacos/go.mod
+++ b/contrib/registry/nacos/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/registry/nacos/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.0.0
diff --git a/contrib/registry/zookeeper/go.mod b/contrib/registry/zookeeper/go.mod
index f8cdaa20e..853bfa9fe 100644
--- a/contrib/registry/zookeeper/go.mod
+++ b/contrib/registry/zookeeper/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/contrib/registry/zookeeper/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.0.0
diff --git a/go.mod b/go.mod
index 2be0b1651..f01e83cc6 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-kratos/kratos/v2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/fsnotify/fsnotify v1.4.9