diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 0b9ff87..8920fb6 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -14,18 +14,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - uses: actions/setup-go@v4
+        with:
+          go-version-file: 'go.mod'
       - uses: golangci/golangci-lint-action@v3
   test:
     strategy:
       matrix:
         os: ['ubuntu-latest', 'macOS-latest', 'windows-latest']
-        go: ["1.20.x", "1.19.x"]
     runs-on: ubuntu-latest
     steps:
+    - uses: actions/checkout@v4
     - uses: actions/setup-go@v4
       with:
-        go-version: ${{ matrix.go }}
-    - uses: actions/checkout@v4
+        go-version-file: 'go.mod'
     - uses: actions/cache@v3
       with:
         path: ~/go/pkg/mod
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 95cc876..65bb7fb 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -15,7 +15,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.19
+          go-version-file: 'go.mod'
       - name: Generate Token
         id: generate_token
         uses: tibdex/github-app-token@v2
diff --git a/go.mod b/go.mod
index 36f362b..6fa952a 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/tukaelu/sabadashi
 
-go 1.19
+go 1.21
 
 require (
 	github.com/k0kubun/go-ansi v0.0.0-20180517002512-3bf9e2903213
diff --git a/go.sum b/go.sum
index 0512315..ac03c19 100644
--- a/go.sum
+++ b/go.sum
@@ -6,6 +6,7 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/k0kubun/go-ansi v0.0.0-20180517002512-3bf9e2903213 h1:qGQQKEcAR99REcMpsXCp3lJ03zYT1PkRd3kQGPn9GVg=
 github.com/k0kubun/go-ansi v0.0.0-20180517002512-3bf9e2903213/go.mod h1:vNUNkEQ1e29fT/6vq2aBdFsgNPmy8qMdSay1npru+Sw=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
+github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/mackerelio/mackerel-client-go v0.26.0 h1:72hj2zw/rqTUNMNokenRxs6KfJ1aVxRHpZT8X4eOUuA=
 github.com/mackerelio/mackerel-client-go v0.26.0/go.mod h1:b4qVMQi+w4rxtKQIFycLWXNBtIi9d0r571RzYmg/aXo=
 github.com/mattn/go-isatty v0.0.17 h1:BTarxUcIeDqL27Mc+vyvdWYSL28zpIhv3RoTdsLMPng=