diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2d06872..5d6d6aa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5.0.0
         with:
-          node-version: 20.x
+          node-version: 22.x
       - name: Build
         working-directory: ./client
         run: yarn install
@@ -37,7 +37,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5.0.0
         with:
-          node-version: 20.x
+          node-version: 22.x
       - name: Install
         working-directory: ./client
         run: |
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 3972637..afc42ce 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -67,7 +67,7 @@ jobs:
       - uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5.0.0
         if: steps.check_changes.outputs.should_publish == 'true'
         with:
-          node-version: 20.x
+          node-version: 22.x
           registry-url: 'https://registry.npmjs.org'
 
       - name: Build
diff --git a/AGENTS.md b/AGENTS.md
index eefec81..994e974 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -11,7 +11,7 @@ This repository is split into two main parts:
   - `server/releng/`: target platform, feature, and p2 repository modules.
 
 ## Build, Test, and Development Commands
-- `cd client && yarn install`: install workspace dependencies (Node `>=20`, Yarn 1.x).
+- `cd client && yarn install`: install workspace dependencies (Node `>=22`, Yarn 1.x).
 - `cd client && yarn build`: compile TS packages and bundle the workflow webapp.
 - `cd client && yarn lint`: run ESLint on all TS/TSX sources.
 - `cd client && yarn format:check`: verify Prettier formatting.
diff --git a/Jenkinsfile b/Jenkinsfile
index 22409f0..fa365ba 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -4,7 +4,7 @@ kind: Pod
 spec:
   containers:
   - name: ci
-    image: eclipseglsp/ci:alpine-v7.1
+    image: eclipseglsp/ci:alpine-v8.0
     resources:
       limits:
         memory: "2Gi"
diff --git a/client/package.json b/client/package.json
index df7a452..95f1e6e 100644
--- a/client/package.json
+++ b/client/package.json
@@ -30,14 +30,14 @@
   },
   "devDependencies": {
     "@eclipse-glsp/dev": "next",
-    "@types/node": "20.x",
+    "@types/node": "22.x",
     "copyfiles": "^2.4.1",
     "lerna": "^9.0.0",
     "mocha-ctrf-json-reporter": "^0.0.9",
     "typescript": "^5.9.2"
   },
   "engines": {
-    "node": ">=20",
+    "node": ">=22",
     "yarn": ">=1.7.0 <2"
   }
 }
diff --git a/client/yarn.lock b/client/yarn.lock
index ff98415..e69e76b 100644
--- a/client/yarn.lock
+++ b/client/yarn.lock
@@ -1520,10 +1520,10 @@
   dependencies:
     undici-types "~5.26.4"
 
-"@types/node@20.x":
-  version "20.19.11"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-20.19.11.tgz#728cab53092bd5f143beed7fbba7ba99de3c16c4"
-  integrity sha512-uug3FEEGv0r+jrecvUUpbY8lLisvIjg6AAic6a2bSP5OEOLeJsDSnvhCDov7ipFFMXS3orMpzlmi0ZcuGkBbow==
+"@types/node@22.x":
+  version "22.19.19"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-22.19.19.tgz#3124bf26ded54168b768138321fef99b420c6112"
+  integrity sha512-dyh/xO2Fh5bYrfWaaqGrRQQGkNdmYw6AmaAUvYeUMNTWQtvb796ikLdmTchRmOlOiIJ1TDXfWgVx1QkUlQ6Hew==
   dependencies:
     undici-types "~6.21.0"