diff --git a/.github/actions/linux-alpine-node-16/action.yml b/.github/actions/linux-alpine-node-16/action.yml
deleted file mode 100644
index 4cc82d8..0000000
--- a/.github/actions/linux-alpine-node-16/action.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-name: 'Create a binary artifact for Node 16 on Alpine Linux'
-description: 'Create a binary artifact for Node 16 on Alpine Linux using musl'
-runs:
-  using: 'docker'
-  image: 'Dockerfile'
-  args:
-    - ${{inputs.node-version}}
diff --git a/.github/actions/linux-alpine-node-16/Dockerfile b/.github/actions/linux-alpine-node-21/Dockerfile
similarity index 86%
rename from .github/actions/linux-alpine-node-16/Dockerfile
rename to .github/actions/linux-alpine-node-21/Dockerfile
index 9dc7e02..b58b7e8 100644
--- a/.github/actions/linux-alpine-node-16/Dockerfile
+++ b/.github/actions/linux-alpine-node-21/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:16-alpine
+FROM node:21-alpine
 
 RUN apk add --no-cache python3 make gcc g++ linux-headers
 
diff --git a/.github/actions/linux-alpine-node-21/action.yml b/.github/actions/linux-alpine-node-21/action.yml
new file mode 100644
index 0000000..f0eac4d
--- /dev/null
+++ b/.github/actions/linux-alpine-node-21/action.yml
@@ -0,0 +1,7 @@
+name: 'Create a binary artifact for Node 21 on Alpine Linux'
+description: 'Create a binary artifact for Node 21 on Alpine Linux using musl'
+runs:
+  using: 'docker'
+  image: 'Dockerfile'
+  args:
+    - ${{inputs.node-version}}
diff --git a/.github/actions/linux-alpine-node-16/entrypoint.sh b/.github/actions/linux-alpine-node-21/entrypoint.sh
similarity index 100%
rename from .github/actions/linux-alpine-node-16/entrypoint.sh
rename to .github/actions/linux-alpine-node-21/entrypoint.sh
diff --git a/.github/actions/linux-node-12/Dockerfile b/.github/actions/linux-node-12/Dockerfile
deleted file mode 100644
index f3167a4..0000000
--- a/.github/actions/linux-node-12/Dockerfile
+++ /dev/null
@@ -1,15 +0,0 @@
-FROM centos:centos7
-
-RUN yum install -y centos-release-scl && \
-    INSTALL_PKGS="devtoolset-8 python3 make git" && \
-    yum install -y --setopt=tsflags=nodocs $INSTALL_PKGS && \
-    rpm -V $INSTALL_PKGS && \
-    yum -y clean all --enablerepo='*'
-    #  && \
-    # source scl_source enable devtoolset-8 && \
-    # source scl_source enable python3
-
-ENV PATH=/opt/rh/devtoolset-8/root/usr/bin:$PATH
-
-COPY entrypoint.sh /entrypoint.sh
-ENTRYPOINT ["/entrypoint.sh"]
diff --git a/.github/actions/linux-node-12/action.yml b/.github/actions/linux-node-12/action.yml
deleted file mode 100644
index 888f096..0000000
--- a/.github/actions/linux-node-12/action.yml
+++ /dev/null
@@ -1,12 +0,0 @@
-name: 'Create a binary artifact for Node > 10 on Linux'
-description: 'Create a binary artifact for Node > 10 on Linux using CentOS7 and glibc 2.17'
-inputs:
-  node-version:
-    description: 'Node.js version'
-    required: false
-    default: '12'
-runs:
-  using: 'docker'
-  image: 'Dockerfile'
-  args:
-    - ${{inputs.node-version}}
diff --git a/.github/actions/linux-node-12/entrypoint.sh b/.github/actions/linux-node-12/entrypoint.sh
deleted file mode 100755
index 8edc650..0000000
--- a/.github/actions/linux-node-12/entrypoint.sh
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/bin/bash -l
-
-set -e
-
-NVM_DIR=$HOME/.nvm
-
-curl -sS -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.2/install.sh | bash
-[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
-
-nvm install --no-progress $1
-
-npm config set unsafe-perm true
-export DEVELOPMENT_SKIP_GETTING_ASSET=true
-npm i
-npm run build --if-present
-npm test
-npm run save-to-github
diff --git a/.github/actions/linux-node-21/Dockerfile b/.github/actions/linux-node-21/Dockerfile
new file mode 100644
index 0000000..5d127bf
--- /dev/null
+++ b/.github/actions/linux-node-21/Dockerfile
@@ -0,0 +1,6 @@
+FROM node:21-buster
+
+RUN apt install python3 make gcc g++
+
+COPY entrypoint.sh /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]
diff --git a/.github/actions/linux-node-21/action.yml b/.github/actions/linux-node-21/action.yml
new file mode 100644
index 0000000..c00cf4e
--- /dev/null
+++ b/.github/actions/linux-node-21/action.yml
@@ -0,0 +1,12 @@
+name: 'Create a binary artifact for Node 21 on Linux'
+description: 'Create a binary artifact for Node 21 on Linux using node:21-buster'
+inputs:
+  node-version:
+    description: 'Node.js version'
+    required: false
+    default: '21'
+runs:
+  using: 'docker'
+  image: 'Dockerfile'
+  args:
+    - ${{inputs.node-version}}
diff --git a/.github/actions/linux-node-21/entrypoint.sh b/.github/actions/linux-node-21/entrypoint.sh
new file mode 100755
index 0000000..43c3ed9
--- /dev/null
+++ b/.github/actions/linux-node-21/entrypoint.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -e
+
+#npm config set unsafe-perm true
+export USERNAME=`whoami`
+export DEVELOPMENT_SKIP_GETTING_ASSET=true
+npm i
+npm run build --if-present
+npm test
+npm run save-to-github
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 81e05a7..01fbeeb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -29,7 +29,7 @@ jobs:
     strategy:
       matrix:
         os: [macOS-latest, windows-latest]
-        node-version: [16, 18, 20]
+        node-version: [18, 20, 21]
 
     steps:
     - uses: actions/checkout@v3
@@ -51,29 +51,23 @@ jobs:
         GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
       run: npm run save-to-github
 
-  build-linux-centos7-node:
-    name: Node.js ${{matrix.node-version}} on CentOS 7
+  build-linux-node-18:
+    name: Node.js 18 on Debian Buster
     needs: create-release
     runs-on: ubuntu-latest
     continue-on-error: true
 
-    strategy:
-      matrix:
-        node-version: [16]
-
     steps:
     - uses: actions/checkout@v3
       with:
         submodules: true
     - name: Install, test, and create artifact
-      uses: ./.github/actions/linux-node-12/
+      uses: ./.github/actions/linux-node-18/
       env:
         GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
-      with:
-        node-version: ${{matrix.node-version}}
 
-  build-linux-node-18:
-    name: Node.js 18 on Debian Buster
+  build-linux-node-20:
+    name: Node.js 20 on Debian Buster
     needs: create-release
     runs-on: ubuntu-latest
     continue-on-error: true
@@ -83,12 +77,12 @@ jobs:
       with:
         submodules: true
     - name: Install, test, and create artifact
-      uses: ./.github/actions/linux-node-18/
+      uses: ./.github/actions/linux-node-20/
       env:
         GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
 
-  build-linux-node-20:
-    name: Node.js 20 on Debian Buster
+  build-linux-node-21:
+    name: Node.js 21 on Debian Buster
     needs: create-release
     runs-on: ubuntu-latest
     continue-on-error: true
@@ -98,12 +92,12 @@ jobs:
       with:
         submodules: true
     - name: Install, test, and create artifact
-      uses: ./.github/actions/linux-node-20/
+      uses: ./.github/actions/linux-node-21/
       env:
         GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
 
-  build-linux-alpine-node-16:
-    name: Node.js 16 on Alpine Linux
+  build-linux-alpine-node-18:
+    name: Node.js 18 on Alpine Linux
     needs: create-release
     runs-on: ubuntu-latest
     continue-on-error: true
@@ -113,12 +107,12 @@ jobs:
       with:
         submodules: true
     - name: Install, test, and create artifact
-      uses: ./.github/actions/linux-alpine-node-16/
+      uses: ./.github/actions/linux-alpine-node-18/
       env:
         GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
 
-  build-linux-alpine-node-18:
-    name: Node.js 18 on Alpine Linux
+  build-linux-alpine-node-20:
+    name: Node.js 20 on Alpine Linux
     needs: create-release
     runs-on: ubuntu-latest
     continue-on-error: true
@@ -128,12 +122,12 @@ jobs:
       with:
         submodules: true
     - name: Install, test, and create artifact
-      uses: ./.github/actions/linux-alpine-node-18/
+      uses: ./.github/actions/linux-alpine-node-20/
       env:
         GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
 
-  build-linux-alpine-node-20:
-    name: Node.js 20 on Alpine Linux
+  build-linux-alpine-node-21:
+    name: Node.js 21 on Alpine Linux
     needs: create-release
     runs-on: ubuntu-latest
     continue-on-error: true
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 5cc5bdf..a7a808b 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macOS-latest, windows-latest]
-        node-version: [16, 18, 20]
+        node-version: [18, 20, 21]
 
     steps:
     - uses: actions/checkout@v3