diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 36bf48432f..392a035606 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x, 20.x, 22.x, 24.x]
+        node-version: [22.x, 24.x, 26.x]
 
     steps:
     - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
@@ -17,6 +17,12 @@ jobs:
       uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
       with:
         node-version: ${{ matrix.node-version }}
+    # Java 21 is required by firebase-tools to run emulator-based integration tests
+    - name: Set up Java
+      uses: actions/setup-java@99b8673ff64fbf99d8d325f52d9a5bdedb8483e9 # v4.2.1
+      with:
+        distribution: 'temurin'
+        java-version: '21'
     - name: Install and build
       run: |
         npm ci
@@ -28,6 +34,6 @@ jobs:
       run: npm run api-extractor
     - name: Run emulator-based integration tests
       run: |
-        npm install -g firebase-tools@11.30.0
+        npm install -g firebase-tools@15.17.0
         firebase emulators:exec --project fake-project-id --only auth,database,firestore \
           'npx mocha test/integration/auth.spec.ts test/integration/database.spec.ts test/integration/firestore.spec.ts --slow 5000 --timeout 20000 --require ts-node/register'
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 8f4e36bbfb..031f36e27d 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -36,7 +36,14 @@ jobs:
     - name: Set up Node.js
       uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
       with:
-        node-version: 18.x
+        node-version: 22.x
+
+    # Java 21 is required by firebase-tools to run emulator-based integration tests
+    - name: Set up Java
+      uses: actions/setup-java@99b8673ff64fbf99d8d325f52d9a5bdedb8483e9 # v4.2.1
+      with:
+        distribution: 'temurin'
+        java-version: '21'
 
     - name: Install and build
       run: |
@@ -52,7 +59,7 @@ jobs:
 
     - name: Run emulator-based integration tests
       run: |
-        npm install -g firebase-tools@11.30.0
+        npm install -g firebase-tools@15.17.0
         firebase emulators:exec --project fake-project-id --only auth,database,firestore \
           'npx mocha test/integration/auth.spec.ts test/integration/database.spec.ts test/integration/firestore.spec.ts --slow 5000 --timeout 20000 --require ts-node/register'
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 88bf8a28ba..0664d18af7 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -51,7 +51,7 @@ jobs:
     - name: Set up Node.js
       uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
       with:
-        node-version: 18.x
+        node-version: 22.x
 
     - name: Install and build
       run: |
@@ -122,7 +122,7 @@ jobs:
     - name: Set up Node.js
       uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
       with:
-        node-version: 18.x
+        node-version: 22.x
 
     - name: Publish preflight check
       id: preflight
diff --git a/README.md b/README.md
index 73c5fe9a21..bb8905d932 100644
--- a/README.md
+++ b/README.md
@@ -59,8 +59,7 @@ requests, code review feedback, and also pull requests.
 
 ## Supported Environments
 
-We currently support Node.js 18 and higher, but support for Node.js 18 and Node.js 20 is deprecated. We strongly encourage
-you to use Node.js 22 or higher as we will drop support for Node.js 18 and Node.js 20 in the next major version.
+We currently support Node.js 22 and higher.
 
 Please also note that the Admin SDK should only
 be used in server-side/back-end environments controlled by the app developer.
diff --git a/package.json b/package.json
index b88901e6e2..e86f53c1ae 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "license": "Apache-2.0",
   "homepage": "https://firebase.google.com/",
   "engines": {
-    "node": ">=18"
+    "node": ">=22"
   },
   "scripts": {
     "build": "gulp build",