diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f2b0b447..caf72cbe 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,22 +4,22 @@ on:
   pull_request:
     types: [opened, synchronize]
 
-env:
-  NODE_VERSION: 20.x
-
 jobs:
   setup:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x]
     steps:
       - run: echo "Triggered by ${{ github.event_name }} event."
 
       - name: Check out repository code ${{ github.repository }} on ${{ github.ref }}
         uses: actions/checkout@v3
 
-      - name: Set up Node.js ${{ env.NODE_VERSION }}
+      - name: Set up Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with:
-          node-version: ${{ env.NODE_VERSION }}
+          node-version: ${{ matrix.node-version }}
           cache: 'npm'
 
       - name: Cache node modules
@@ -39,10 +39,19 @@ jobs:
   build:
     needs: setup
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x]
     steps:
       - name: Check out repository code ${{ github.repository }} on ${{ github.ref }}
         uses: actions/checkout@v3
 
+      - name: Set up Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+
       - name: Restore node modules from cache
         uses: actions/cache@v3
         with:
@@ -59,10 +68,19 @@ jobs:
   test-current:
     needs: setup
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x]
     steps:
       - name: Check out repository code ${{ github.repository }} on ${{ github.ref }}
         uses: actions/checkout@v3
 
+      - name: Set up Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+
       - name: Restore node modules from cache
         uses: actions/cache@v3
         with:
@@ -79,6 +97,9 @@ jobs:
   test-target:
     needs: setup
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x]
     steps:
       - name: Check out repository code ${{ github.repository }} on ${{ github.ref }}
         uses: actions/checkout@v3
@@ -105,10 +126,10 @@ jobs:
             echo "Merge successful."
           fi
 
-      - name: Set up Node.js ${{ env.NODE_VERSION }}
+      - name: Set up Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with:
-          node-version: ${{ env.NODE_VERSION }}
+          node-version: ${{ matrix.node-version }}
           cache: 'npm'
 
       - name: Restore node modules from cache
@@ -141,10 +162,10 @@ jobs:
         run: |
           echo "//registry.npmjs.org/:_authToken=${{ secrets.NPM_TOKEN }}" > .npmrc
 
-      - name: Set up Node.js ${{ env.NODE_VERSION }}
+      - name: Set up Node.js 20.x
         uses: actions/setup-node@v3
         with:
-          node-version: ${{ env.NODE_VERSION }}
+          node-version: 20.x
           cache: 'npm'
           registry-url: 'https://registry.npmjs.org/'