diff --git a/.github/workflows/deploy-win.yml b/.github/workflows/deploy-win.yml
index 9ba10117c..b2b8532ad 100644
--- a/.github/workflows/deploy-win.yml
+++ b/.github/workflows/deploy-win.yml
@@ -21,10 +21,10 @@ jobs:
         with:
           fetch-depth: 0
           ref: ${{ github.event.inputs.buildnumber }}
-      - name: Use Node.js 18.x
+      - name: Use Node.js 20.x
         uses: actions/setup-node@v3
         with:
-          node-version: 18.x
+          node-version: 20.x
           check-latest: true
           cache: npm
       - name: Build distribution
@@ -44,10 +44,10 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Use Node.js 18.x
+      - name: Use Node.js 20.x
         uses: actions/setup-node@v3
         with:
-          node-version: 18.x
+          node-version: 20.x
           check-latest: true
           cache: npm
       - name: Download the built distribution
diff --git a/.github/workflows/test-and-deploy.yml b/.github/workflows/test-and-deploy.yml
index 983a1d406..58ae092c2 100644
--- a/.github/workflows/test-and-deploy.yml
+++ b/.github/workflows/test-and-deploy.yml
@@ -11,10 +11,10 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Use Node.js 18.x
+      - name: Use Node.js 20.x
         uses: actions/setup-node@v3
         with:
-          node-version: 18.x
+          node-version: 20.x
           check-latest: true
           cache: npm
       - name: Install prerequisites
@@ -40,10 +40,10 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Use Node.js 18.x
+      - name: Use Node.js 20.x
         uses: actions/setup-node@v3
         with:
-          node-version: 18.x
+          node-version: 20.x
           check-latest: true
           cache: npm
       - name: Build distribution
@@ -64,10 +64,10 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Use Node.js 18.x
+      - name: Use Node.js 20.x
         uses: actions/setup-node@v3
         with:
-          node-version: 18.x
+          node-version: 20.x
           check-latest: true
           cache: npm
       - name: Download the built distribution
diff --git a/.github/workflows/test-win.yml b/.github/workflows/test-win.yml
index 31eba8cf1..7270975b8 100644
--- a/.github/workflows/test-win.yml
+++ b/.github/workflows/test-win.yml
@@ -15,10 +15,10 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Use Node.js 18.x
+      - name: Use Node.js 20.x
         uses: actions/setup-node@v3
         with:
-          node-version: 18.x
+          node-version: 20.x
           check-latest: true
           cache: npm
       - name: Install prerequisites
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 5b706c4bc..4e3744e24 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -20,8 +20,8 @@ in the right direction.
 
 ## Node version
 
-**Compiler Explorer** currently targets [Node.js](https://nodejs.org/) LTS version 18 so it's better if you do so as
-well when testing your changes locally.
+**Compiler Explorer** currently targets [Node.js](https://nodejs.org/) version 20, so it's better if you do so as well
+when testing your changes locally.
 
 ## In brief
 
diff --git a/Makefile b/Makefile
index bd59f38db..4c95f20dd 100644
--- a/Makefile
+++ b/Makefile
@@ -7,6 +7,8 @@ help: # with thanks to Ben Rady
 NODE:=node-not-found
 NPM:=npm-not-found
 NODE_MODULES:=./node_modules/.npm-updated
+NODE_ARGS?=
+TS_NODE_ARGS:=--no-warnings=ExperimentalWarning --loader ts-node/esm
 
 # These 'find' scripts cache their results in a dotfile.
 # Doing it this way instead of NODE:=$(shell etc/script/find-node) means
@@ -86,15 +88,15 @@ run:  ## Runs the site like it runs in production
 
 .PHONY: dev
 dev: prereqs ## Runs the site as a developer; including live reload support and installation of git hooks
-	NODE_OPTIONS=$(NODE_ARGS) ./node_modules/.bin/supervisor -w app.ts,lib,etc/config,static/tsconfig.json -e 'js|ts|node|properties|yaml' -n exit --exec $(shell pwd)/node_modules/.bin/ts-node-esm -- ./app.ts $(EXTRA_ARGS)
+	NODE_OPTIONS="$(TS_NODE_ARGS) $(NODE_ARGS)" ./node_modules/.bin/supervisor -w app.ts,lib,etc/config,static/tsconfig.json -e 'js|ts|node|properties|yaml' -n exit --exec $(NODE) -- ./app.ts $(EXTRA_ARGS)
 
 .PHONY: gpu-dev
 gpu-dev: prereqs ## Runs the site as a developer; including live reload support and installation of git hooks
-	NODE_OPTIONS=$(NODE_ARGS) ./node_modules/.bin/supervisor -w app.ts,lib,etc/config,static/tsconfig.json -e 'js|ts|node|properties|yaml' -n exit --exec $(shell pwd)/node_modules/.bin/ts-node-esm -- ./app.ts --env gpu $(EXTRA_ARGS)
+	NODE_OPTIONS="$(TS_NODE_ARGS) $(NODE_ARGS)" ./node_modules/.bin/supervisor -w app.ts,lib,etc/config,static/tsconfig.json -e 'js|ts|node|properties|yaml' -n exit --exec $(NODE) -- ./app.ts --env gpu $(EXTRA_ARGS)
 
 .PHONY: debug
 debug: prereqs ## Runs the site as a developer with full debugging; including live reload support and installation of git hooks
-	NODE_OPTIONS="$(NODE_ARGS) --inspect 9229" ./node_modules/.bin/supervisor -w app.ts,lib,etc/config,static/tsconfig.json -e 'js|ts|node|properties|yaml' -n exit --exec $(shell pwd)/node_modules/.bin/ts-node-esm -- ./app.ts --debug $(EXTRA_ARGS)
+	NODE_OPTIONS="$(TS_NODE_ARGS) $(NODE_ARGS) --inspect 9229" ./node_modules/.bin/supervisor -w app.ts,lib,etc/config,static/tsconfig.json -e 'js|ts|node|properties|yaml' -n exit --exec $(NODE) -- ./app.ts --debug $(EXTRA_ARGS)
 
 .PHONY:
 asm-docs:
diff --git a/README.md b/README.md
index 4a1d01444..ddd6769f6 100644
--- a/README.md
+++ b/README.md
@@ -59,8 +59,8 @@ Assuming you have a compatible version of `node` installed, on Linux simply runn
 running with an Explorer running on port 10240 on your local machine:
 [http://localhost:10240/](http://localhost:10240/). If this doesn't work for you, please contact us, as we consider it
 important you can quickly and easily get running. Currently, **Compiler Explorer** requires
-[`node` 18 _(LTS version)_](CONTRIBUTING.md#node-version) installed, either on the path or at `NODE_DIR` (an environment
-variable or `make` parameter).
+[`node` 20](CONTRIBUTING.md#node-version) installed, either on the path or at `NODE_DIR` (an environment variable or
+`make` parameter).
 
 Running with `make EXTRA_ARGS='--language LANG'` will allow you to load `LANG` exclusively, where `LANG` is one for the
 language ids/aliases defined in `lib/languages.ts`. For example, to only run **Compiler Explorer** with C++ support,
diff --git a/compiler-args-app.ts b/compiler-args-app.ts
index 2b2066ef0..3f5044c38 100644
--- a/compiler-args-app.ts
+++ b/compiler-args-app.ts
@@ -149,7 +149,7 @@ class CompilerArgsApp {
 if (!opts.parser || !opts.exe) {
     console.error(
         'Usage: ' +
-            'ts-node-esm compiler-args-app.ts ' +
+            'node --no-warnings=ExperimentalWarning --loader ts-node/esm compiler-args-app.ts ' +
             '--parser=<compilertype> --exe=<path> [--padding=<number>]\n' +
             'for example: --parser=clang --exe=/opt/compiler-explorer/clang-15.0.0/bin/clang++ --padding=50',
     );
diff --git a/docs/AddingASiteTemplate.md b/docs/AddingASiteTemplate.md
index cf5b0fd5b..64592a807 100644
--- a/docs/AddingASiteTemplate.md
+++ b/docs/AddingASiteTemplate.md
@@ -21,7 +21,7 @@ Site template screenshots are generated with a hacky script located at
 To run the script, `cd` to the `etc/scripts/` directory and run
 
 ```bash
-npm i puppeteer --no-save && npx ts-node-esm generate_site_template_screenshots.ts
+npm i puppeteer --no-save && npx node --no-warnings=ExperimentalWarning --loader ts-node/esm generate_site_template_screenshots.ts
 ```
 
 The script uses puppeteer and chrome to generate screenshots. The script will take a little while to run as it generates
diff --git a/etc/scripts/build-dist-win.ps1 b/etc/scripts/build-dist-win.ps1
index a84adab11..6d5b0b514 100644
--- a/etc/scripts/build-dist-win.ps1
+++ b/etc/scripts/build-dist-win.ps1
@@ -54,7 +54,7 @@ Add-Content -Path $env:GITHUB_OUTPUT -Value "branch=$BRANCH"
 Add-Content -Path $env:GITHUB_OUTPUT -Value "release_name=$RELEASE_NAME"
 
 # Run to make sure we haven't just made something that won't work
-../../node_modules/.bin/ts-node-esm ./app.js --version --dist
+node --no-warnings=ExperimentalWarning --loader ts-node/esm ./app.js --version --dist
 
 Remove-Item -Path "$ROOT/out/dist-bin" -Force -Recurse  -ErrorAction Ignore
 New-Item -Path $ROOT -Name "out/dist-bin" -Force -ItemType "directory"
diff --git a/etc/scripts/build-dist.sh b/etc/scripts/build-dist.sh
index 3330df1f9..ac3c5b4a4 100755
--- a/etc/scripts/build-dist.sh
+++ b/etc/scripts/build-dist.sh
@@ -45,7 +45,7 @@ echo "branch=${GITHUB_REF#refs/heads/}" >> "${GITHUB_OUTPUT}"
 echo "release_name=${RELEASE_NAME}" >> "${GITHUB_OUTPUT}"
 
 # Run to make sure we haven't just made something that won't work
-../../node_modules/.bin/ts-node-esm ./app.js --version --dist
+node --no-warnings=ExperimentalWarning --loader ts-node/esm ./app.js --version --dist
 
 rm -rf "${ROOT}/out/dist-bin"
 mkdir -p "${ROOT}/out/dist-bin"
diff --git a/etc/scripts/docenizers/docenizer-java.sh b/etc/scripts/docenizers/docenizer-java.sh
index 2a0cc7c9b..0cb16fc93 100755
--- a/etc/scripts/docenizers/docenizer-java.sh
+++ b/etc/scripts/docenizers/docenizer-java.sh
@@ -4,4 +4,4 @@ JVMS_PATH=$(pwd)/vendor/jvms.html
 
 [ -f "$JVMS_PATH" ] || curl https://docs.oracle.com/javase/specs/jvms/se18/html/jvms-6.html -o "$JVMS_PATH"
 
-npx ts-node-esm docenizer-java.ts > ../../../lib/asm-docs/generated/asm-docs-java.ts
+npx node --no-warnings=ExperimentalWarning --loader ts-node/esm docenizer-java.ts > ../../../lib/asm-docs/generated/asm-docs-java.ts
diff --git a/etc/scripts/docenizers/docenizer-llvm.sh b/etc/scripts/docenizers/docenizer-llvm.sh
index 92dcc341d..aec89c6e8 100755
--- a/etc/scripts/docenizers/docenizer-llvm.sh
+++ b/etc/scripts/docenizers/docenizer-llvm.sh
@@ -4,4 +4,4 @@ LANGREF_PATH=$(pwd)/vendor/LangRef.html
 
 [ -f "$LANGREF_PATH" ] || curl https://llvm.org/docs/LangRef.html -o "$LANGREF_PATH"
 
-npx ts-node-esm docenizer-llvm.ts > ../../../lib/asm-docs/generated/asm-docs-llvm.ts
+npx node --no-warnings=ExperimentalWarning --loader ts-node/esm docenizer-llvm.ts > ../../../lib/asm-docs/generated/asm-docs-llvm.ts
diff --git a/etc/scripts/find-node b/etc/scripts/find-node
index 59d8bf169..190ad222c 100755
--- a/etc/scripts/find-node
+++ b/etc/scripts/find-node
@@ -24,8 +24,8 @@ find_node() {
 
 NODE="$(find_node)"
 
-NODE_MIN_VERSION=16
-NODE_VERSION_USED=18
+NODE_MIN_VERSION=18
+NODE_VERSION_USED=20
 NODE_VERSION=$(${NODE} --version)
 NODE_MAJOR_VERSION=$(echo "${NODE_VERSION}" | cut -f1 -d. | sed 's/^v//g')
 
diff --git a/package.json b/package.json
index 243cfb668..7633fcabc 100644
--- a/package.json
+++ b/package.json
@@ -175,14 +175,14 @@
     "lint": "eslint --max-warnings=0 . --fix",
     "lint-check": "eslint --max-warnings=0 .",
     "lint-files": "eslint --max-warnings=0",
-    "test": "ts-node-esm ./node_modules/mocha/bin/mocha.js -b 'test/**/*.ts' 'test/**/*.js'",
-    "test-min": "ts-node-esm ./node_modules/mocha/bin/mocha.js -b --config .mocharc-min.yml",
+    "test": "node --no-warnings=ExperimentalWarning --loader ts-node/esm ./node_modules/mocha/bin/mocha.js -b 'test/**/*.ts' 'test/**/*.js'",
+    "test-min": "node --no-warnings=ExperimentalWarning --loader ts-node/esm ./node_modules/mocha/bin/mocha.js -b --config .mocharc-min.yml",
     "fix": "npm run lint && npm run format && npm run ts-check",
     "check": "npm run ts-check && npm run lint-check && npm run test-min -- --reporter min",
-    "dev": "cross-env NODE_ENV=DEV ts-node-esm app.ts",
+    "dev": "cross-env NODE_ENV=DEV node --no-warnings=ExperimentalWarning --loader ts-node/esm app.ts",
     "debugger": "cross-env NODE_ENV=DEV node --loader ts-node/esm --inspect-brk app.ts",
-    "debug": "cross-env NODE_ENV=DEV ts-node-esm app.ts --debug",
-    "start": "npm run webpack && cross-env NODE_ENV=LOCAL ts-node-esm app.ts",
+    "debug": "cross-env NODE_ENV=DEV node --no-warnings=ExperimentalWarning --loader ts-node/esm app.ts --debug",
+    "start": "npm run webpack && cross-env NODE_ENV=LOCAL node --no-warnings=ExperimentalWarning --loader ts-node/esm app.ts",
     "codecov": "codecov --disable=gcov",
     "sentry": "npx -p @sentry/cli sentry-cli",
     "update-browserslist": "npx browserslist@latest -- --update-db",
@@ -191,7 +191,7 @@
     "format-files": "prettier --write --ignore-unknown",
     "ts-compile": "tsc",
     "ts-check": "tsc -p ./tsconfig.backend.json --noEmit && tsc -p ./tsconfig.frontend.json --noEmit",
-    "webpack": "ts-node-esm ./node_modules/webpack-cli/bin/cli.js --node-env=production --config webpack.config.esm.ts"
+    "webpack": "node --no-warnings=ExperimentalWarning --loader ts-node/esm ./node_modules/webpack-cli/bin/cli.js --node-env=production --config webpack.config.esm.ts"
   },
   "license": "BSD-2-Clause"
 }