diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c95bd22..1634ba1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -23,6 +23,8 @@ jobs:
           - 16
           - 17
           - 18
+          - 19
+          - 20
         os:
           - ubuntu-latest
           - macos-latest
diff --git a/scripts/check-node-support.js b/scripts/check-node-support.js
index 28e05b4..296e889 100755
--- a/scripts/check-node-support.js
+++ b/scripts/check-node-support.js
@@ -9,7 +9,7 @@ var shell = require('shelljs');
 
 // This is the authoritative list of supported node versions.
 var MIN_NODE_VERSION = 6;
-var MAX_NODE_VERSION = 18;
+var MAX_NODE_VERSION = 20;
 
 function checkReadme(minNodeVersion) {
   var start = '<!-- start minVersion -->';