diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 9af080587f..c9ef161a02 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/vscode/devcontainers/typescript-node:20-bullseye
+FROM mcr.microsoft.com/vscode/devcontainers/typescript-node:22-bullseye
 
 # Install sandbox
 RUN mkdir -p /app/sandbox/policy /app/sandbox/results \
diff --git a/.github/actions/setup-pnpm/action.yml b/.github/actions/setup-pnpm/action.yml
index 55a6f4ec75..dccfb7a1a1 100644
--- a/.github/actions/setup-pnpm/action.yml
+++ b/.github/actions/setup-pnpm/action.yml
@@ -18,7 +18,7 @@ runs:
     - name: Setup Node.js and pnpm
       uses: actions/setup-node@v4
       with:
-        node-version: 20
+        node-version: 22
         cache: 'pnpm'
 
     - name: Install dependencies
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 818388cec2..3883f24903 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -260,3 +260,18 @@ jobs:
         if: steps.filter.outputs.iris == 'true'
         run: go test ./...
         working-directory: ./apps/iris
+
+  # TODO: write smoke test for backend
+  # e.g) start backend server and check if it responds to requests
+  #
+  # ```
+  # pnpm --filter="@codedang/backend" start &
+  #
+  # for i in {1..10}
+  # do
+  #   curl -s http://localhost:3000/health && exit 0
+  #   sleep 2
+  # done
+  # echo "Server did not respond to health check."
+  # exit 1
+  # ```
diff --git a/.gitpod.Dockerfile b/.gitpod.Dockerfile
index 70851f3523..4462929b6f 100644
--- a/.gitpod.Dockerfile
+++ b/.gitpod.Dockerfile
@@ -1,5 +1,8 @@
 FROM gitpod/workspace-full:latest
 
+# Install Node.js
+RUN nvm install v22.14.0
+
 # Install sandbox
 # FIXME: we don't need 777 permission
 RUN sudo mkdir -p /app/sandbox/policy /app/sandbox/results \
diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000000..7d41c735d7
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+22.14.0
diff --git a/apps/backend/Dockerfile b/apps/backend/Dockerfile
index 5cafb40f32..d52c4e8e2c 100644
--- a/apps/backend/Dockerfile
+++ b/apps/backend/Dockerfile
@@ -5,7 +5,7 @@
 ARG target=client
 ARG app_env=production
 
-FROM node:20.18.0-alpine AS builder
+FROM node:22.14.0-alpine AS builder
 ARG target
 
 # Install bash for swc-node
@@ -24,7 +24,7 @@ RUN npx prisma generate
 RUN npm run build ${target}
 
 ### PRODUCTION ###
-FROM node:20.18.0-alpine
+FROM node:22.14.0-alpine
 ARG target
 ARG app_env
 
diff --git a/package.json b/package.json
index 0a2ba0d5ee..21a490685b 100644
--- a/package.json
+++ b/package.json
@@ -30,5 +30,8 @@
     "typescript": "5.7.2",
     "typescript-eslint": "^8.18.1"
   },
-  "packageManager": "pnpm@9.15.2"
+  "packageManager": "pnpm@9.15.2",
+  "engines": {
+    "node": "^22.14.0"
+  }
 }