diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7a0e106..c23d196 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-go@v3
       with:
-        go-version: '1.19'
+        go-version: '1.20'
     - name: Build & Test
       run: |
         go build -v
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index a52b812..02b802e 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -7,7 +7,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-go@v3
       with:
-        go-version: '1.19'
+        go-version: '1.20 '
     - run: go build
     - uses: paambaati/codeclimate-action@v3.2.0
       env:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 25e5578..d6c4244 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,7 +12,7 @@ jobs:
       run: git fetch --prune --unshallow
     - uses: actions/setup-go@v3
       with:
-        go-version: '1.19'
+        go-version: '1.20'
     - name: Release via goreleaser
       uses: goreleaser/goreleaser-action@v4
       with:
diff --git a/.github/workflows/reviewdog.yml b/.github/workflows/reviewdog.yml
index 84cdfc1..b006736 100644
--- a/.github/workflows/reviewdog.yml
+++ b/.github/workflows/reviewdog.yml
@@ -10,7 +10,7 @@ jobs:
           ref: ${{ github.event.pull_request.head.sha }}
       - uses: actions/setup-go@v3
         with:
-          go-version: '1.19'
+          go-version: '1.20'
       - uses: reviewdog/action-staticcheck@v1
         with:
           fail_on_error: true
diff --git a/go.mod b/go.mod
index 5d92157..7295913 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/toshimaru/nyan
 
-go 1.19
+go 1.20
 
 require (
 	github.com/alecthomas/chroma v0.10.0