diff --git a/.github/workflows/go-examples.yml b/.github/workflows/go-examples.yml
index 3c62207..e4352cf 100644
--- a/.github/workflows/go-examples.yml
+++ b/.github/workflows/go-examples.yml
@@ -12,17 +12,17 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        go: [1.15, 1.16]
+        go: [1.21]
 
     steps:
     - name: Set up Go ${{ matrix.go }}
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v4
       with:
         go-version: ${{ matrix.go }}
       id: go
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@master
+      uses: actions/checkout@v4
 
     - name: Running go tests
       env:
diff --git a/.github/workflows/go-tests.yml b/.github/workflows/go-tests.yml
index 8dfb961..f9e8570 100644
--- a/.github/workflows/go-tests.yml
+++ b/.github/workflows/go-tests.yml
@@ -10,23 +10,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - name: Set up Go 1.15
-      uses: actions/setup-go@v2
-      with:
-        go-version: 1.15
-      id: go
-
     - name: Check out code into the Go module directory
-      uses: actions/checkout@master
-
-    - name: Running golangci-lint
-      env:
-        GO111MODULE: auto
-        GOPATH: /home/runner/work/
-      run: |
-        wget https://github.com/golangci/golangci-lint/releases/download/v1.20.1/golangci-lint-1.20.1-linux-amd64.tar.gz
-        tar -xvf ./golangci-lint-1.20.1-linux-amd64.tar.gz
-        GOCILINT=./golangci-lint-1.20.1-linux-amd64/golangci-lint make lint
+      uses: actions/checkout@v4
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      id: go
+      with:
+        go-version: '1.21'
+        cache: true
+    - name: golangci-lint
+      uses: golangci/golangci-lint-action@v3
+      with:
+          version: latest
 
   build:
     name: Test on ${{ matrix.os }} with ${{ matrix.go }}
@@ -34,17 +29,18 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        go: [1.15, 1.16]
+        go: [1.21]
 
     steps:
       - name: Set up Go ${{ matrix.go }}
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
           go-version: ${{ matrix.go }}
+          cache: true
         id: go
 
       - name: Check out code into the Go module directory
-        uses: actions/checkout@master
+        uses: actions/checkout@v4
 
       - name: Put a dummy js file for go:embed.
         run: |
@@ -60,17 +56,18 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macOS-latest]
-        go: [1.16]
+        go: [1.21]
 
     steps:
     - name: Set up Go ${{ matrix.go }}
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v4
       with:
         go-version: ${{ matrix.go }}
+        cache: true
       id: go
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@master
+      uses: actions/checkout@v4
 
     - name: Running go tests
       run: make test
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 15f48db..808f497 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -3,19 +3,21 @@ on:
   push:
     tags:
       - "v[0-9]+.[0-9]+.[0-9]+"
+permissions:
+  contents: write
 jobs:
   goreleaser:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
-          fetch-depth: 1
+          fetch-depth: 0
 
-      - name: Set up Node v14
-        uses: actions/setup-node@v2-beta
+      - name: Set up Node v18
+        uses: actions/setup-node@v3
         with:
-          node-version: '14'
+          node-version: '18'
       - run: |
           cd dashboard
           npm install
@@ -23,13 +25,15 @@ jobs:
           git checkout package-lock.json  # Avoid https://github.com/c-bata/goptuna/runs/2420513033
 
       - name: Setup Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
-          go-version: 1.16
+          go-version: '1.21'
+          cache: true
       - name: Run GoReleaser
-        uses: goreleaser/goreleaser-action@v2
+        uses: goreleaser/goreleaser-action@v4
         with:
           version: latest
-          args: release --rm-dist
+          distribution: goreleaser
+          args: release --clean
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/typescript-checks.yml b/.github/workflows/typescript-checks.yml
index 6796dc1..db1d5e7 100644
--- a/.github/workflows/typescript-checks.yml
+++ b/.github/workflows/typescript-checks.yml
@@ -13,12 +13,12 @@ jobs:
 
     steps:
       - name: Check out code
-        uses: actions/checkout@master
+        uses: actions/checkout@v4
 
-      - name: Set up Node v14
-        uses: actions/setup-node@v2-beta
+      - name: Set up Node
+        uses: actions/setup-node@v3
         with:
-          node-version: '14'
+          node-version: '18'
       - run: |
           cd dashboard
           npm install
@@ -29,12 +29,12 @@ jobs:
 
     steps:
       - name: Check out code
-        uses: actions/checkout@master
+        uses: actions/checkout@v4
 
-      - name: Set up Node v14
-        uses: actions/setup-node@v2-beta
+      - name: Set up Node
+        uses: actions/setup-node@v3
         with:
-          node-version: '14'
+          node-version: '18'
       - run: |
           cd dashboard
           npm install
diff --git a/.golangci.yml b/.golangci.yml
new file mode 100644
index 0000000..dd9cfc8
--- /dev/null
+++ b/.golangci.yml
@@ -0,0 +1,7 @@
+linters:
+  disable-all: true
+  enable:
+    - gocyclo
+    - govet
+    - goimports
+    - misspell
diff --git a/Makefile b/Makefile
index 116c289..a653d88 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,7 @@ fmt: $(SOURCES) ## Formatting source codes.
 
 .PHONY: lint
 lint: ## Run golint and go vet.
-	@$(GOCILINT) run --no-config --disable-all --enable=goimports --enable=gocyclo --enable=govet --enable=misspell --enable=golint ./...
+	@$(GOCILINT) run ./...
 
 .PHONY: test
 test:  ## Run tests with race condition checking.
diff --git a/dashboard/staticfiles_develop.go b/dashboard/staticfiles_develop.go
index 9ae7a06..d8e2c43 100644
--- a/dashboard/staticfiles_develop.go
+++ b/dashboard/staticfiles_develop.go
@@ -1,4 +1,4 @@
-// +build develop
+//go:build develop
 
 package dashboard
 
diff --git a/dashboard/staticfiles_embed.go b/dashboard/staticfiles_embed.go
index 99c76e6..18ed2d7 100644
--- a/dashboard/staticfiles_embed.go
+++ b/dashboard/staticfiles_embed.go
@@ -1,4 +1,4 @@
-// +build !develop,go1.16
+//go:build !develop && go1.16
 
 package dashboard
 
diff --git a/dashboard/staticfiles_statik.go b/dashboard/staticfiles_statik.go
index 927860d..2710d61 100644
--- a/dashboard/staticfiles_statik.go
+++ b/dashboard/staticfiles_statik.go
@@ -1,4 +1,4 @@
-// +build !develop,!go1.16
+//go:build !develop && !go1.16
 
 package dashboard