diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 16006ea..8dc51fc 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,9 +1,6 @@
 name: Test
 on: [push, pull_request]
 
-env:
-  GO111MODULE: "on"
-
 jobs:
   test:
     name: Go ${{ matrix.go }} Test on ${{ matrix.os }}
@@ -17,17 +14,10 @@ jobs:
           - macos-latest
         go:
           - "stable"
+          - "1.22"
           - "1.21"
           - "1.20"
           - "1.19"
-          - "1.18"
-        goexperiment: [""]
-        include:
-          # test with GOEXPERIMENT=loopvar
-          # https://github.com/golang/go/wiki/LoopvarExperiment
-          - go: "1.21"
-            os: ubuntu-latest
-            goexperiment: "loopvar"
 
     steps:
       - name: Check out code
@@ -44,8 +34,6 @@ jobs:
           make test-xrayaws
           make test-xrayaws-v2
         shell: bash
-        env:
-          GOEXPERIMENT: ${{ matrix.goexperiment }}
 
       - name: Send coverage
         uses: shogo82148/actions-goveralls@v1
diff --git a/go.mod b/go.mod
index ccfed47..b9188f8 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/shogo82148/aws-xray-yasdk-go
 
-go 1.18
+go 1.19
 
 require (
 	github.com/google/go-cmp v0.6.0
diff --git a/xrayaws-v2/go.mod b/xrayaws-v2/go.mod
index 811edc7..5395be2 100644
--- a/xrayaws-v2/go.mod
+++ b/xrayaws-v2/go.mod
@@ -1,6 +1,6 @@
 module github.com/shogo82148/aws-xray-yasdk-go/xrayaws-v2
 
-go 1.18
+go 1.19
 
 require (
 	github.com/aws/aws-sdk-go-v2 v1.27.2