diff --git a/.github/workflows/test_web.yml b/.github/workflows/test_web.yml
index 1113d586f..2546ab6e6 100644
--- a/.github/workflows/test_web.yml
+++ b/.github/workflows/test_web.yml
@@ -35,7 +35,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node_version: ["18", "20"]
+        node_version: ["20", "21"]
         rust_version: [stable] # We most likely don't care about Rust versions here, we'll catch those issues in test_rust.yml.
         os: [ubuntu-22.04, windows-latest]
 
@@ -105,7 +105,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        node_version: ["18", "20"]
+        node_version: ["20", "21"]
         rust_version: [stable] # We most likely don't care about Rust versions here, we'll catch those issues in test_rust.yml.
         os: [ubuntu-22.04, windows-latest]
 
diff --git a/web/README.md b/web/README.md
index 5ace33999..7ef4e78cc 100644
--- a/web/README.md
+++ b/web/README.md
@@ -57,7 +57,7 @@ should work. Additionally, headless JREs should also work.
 
 Follow the instructions to [install Node.js](https://nodejs.org/) on your machine.
 
-We recommend using the currently active LTS 18, but we do also run tests with current Node.js 20.
+We recommend using the currently active LTS 20, but we do also run tests with current Node.js 21.
 
 Note that npm 7 or newer is required. It should come bundled with Node.js 15 or newer, but can be upgraded with older Node.js versions using `npm install -g npm` as root/Administrator.