diff --git a/.github/workflows/lint.yaml b/.github/workflows/lint.yaml
index cdcfb33..aa1ec87 100644
--- a/.github/workflows/lint.yaml
+++ b/.github/workflows/lint.yaml
@@ -15,8 +15,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-go@v4
+    - uses: actions/checkout@v4
+    - uses: actions/setup-go@v5
       with:
         go-version-file: '.go-version'
     - name: golangci-lint
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 2e0f795..cff5723 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -13,7 +13,7 @@ jobs:
     timeout-minutes: 5
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - name: Set up Go
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 9e3d123..1eff14e 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -18,8 +18,8 @@ jobs:
       matrix:
         os: [ubuntu-latest, macOS-latest, windows-latest]
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-go@v4
+    - uses: actions/checkout@v4
+    - uses: actions/setup-go@v5
       with:
         go-version-file: '.go-version'
     - name: test
diff --git a/.go-version b/.go-version
index d2ab029..71f7f51 100644
--- a/.go-version
+++ b/.go-version
@@ -1 +1 @@
-1.21
+1.22
diff --git a/Dockerfile b/Dockerfile
index 001371c..af3b8bf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # build
-FROM golang:1.21-alpine3.18 AS builder
+FROM golang:1.22-alpine3.19 AS builder
 RUN apk --no-cache add make git
 WORKDIR /work
 
@@ -13,7 +13,7 @@ RUN make build
 # The linux binary for hub can not run on alpine.
 # So we need to build it from source.
 # https://github.com/github/hub/issues/1818
-FROM golang:1.21-alpine3.18 AS hub
+FROM golang:1.22-alpine3.19 AS hub
 RUN apk add --no-cache bash git
 RUN git clone https://github.com/github/hub /work
 WORKDIR /work
diff --git a/README.md b/README.md
index a3a7110..777be5b 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ https://github.com/minamijoyo/hcledit/releases
 
 ### Source
 
-If you have Go 1.21+ development environment:
+If you have Go 1.22+ development environment:
 
 ```
 $ git clone https://github.com/minamijoyo/hcledit
diff --git a/go.mod b/go.mod
index a8314dc..052d28e 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/minamijoyo/hcledit
 
-go 1.21
+go 1.22
 
 require (
 	github.com/google/go-cmp v0.3.1