diff --git a/.github/workflows/linux-wasm.yml b/.github/workflows/linux-wasm.yml
index 9374a25..5f826cc 100644
--- a/.github/workflows/linux-wasm.yml
+++ b/.github/workflows/linux-wasm.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16]
+        node-version: [15, 16]
     steps:
     - uses: actions/checkout@v1
     - name: Use Node.js ${{ matrix.node-version }}
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 47d54b3..c61725d 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12, 14, 16]
+        node-version: [12, 14, 15, 16]
     steps:
     - uses: actions/checkout@v1
     - name: Use Node.js ${{ matrix.node-version }}
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index dca9490..0c375de 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: macOS-latest
     strategy:
       matrix:
-        node-version: [16]
+        node-version: [15, 16]
     steps:
     - uses: actions/checkout@v1
     - name: Use Node.js ${{ matrix.node-version }}