diff --git a/.changeset/cuddly-mayflies-type.md b/.changeset/cuddly-mayflies-type.md
new file mode 100644
index 00000000..31d3c88c
--- /dev/null
+++ b/.changeset/cuddly-mayflies-type.md
@@ -0,0 +1,11 @@
+---
+'@hypermod/initializer': minor
+'@codeshift/cli': minor
+'@hypermod/validator': minor
+'@hypermod/fetcher': minor
+'@hypermod/utils': minor
+'@hypermod/core': minor
+'@hypermod/cli': minor
+---
+
+Require node 20.17 in support of moving from CJS to ESM
diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 40a1b0e2..bf5cfecc 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@v1
         with:
-          node-version: '18.x'
+          node-version: '20.17.*'
       - name: Generate docs
         run: |
           yarn install --frozen-lockfile
@@ -32,7 +32,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@v1
         with:
-          node-version: '18.x'
+          node-version: '20.17.*'
       - uses: webfactory/ssh-agent@v0.5.0
         with:
           ssh-private-key: ${{ secrets.GH_PAGES_DEPLOY }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index e0d0fd7f..0cca0113 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -16,10 +16,10 @@ jobs:
           # This makes Actions fetch all Git history so that Changesets can generate changelogs with the correct commits
           fetch-depth: 0
 
-      - name: Setup Node.js 18.x
+      - name: Setup Node.js 20.17.*
         uses: actions/setup-node@master
         with:
-          node-version: 18.x
+          node-version: 20.17.*
 
       - name: Install Dependencies
         run: yarn
diff --git a/.github/workflows/test-integration.yml b/.github/workflows/test-integration.yml
index 1d837ea4..01bef723 100644
--- a/.github/workflows/test-integration.yml
+++ b/.github/workflows/test-integration.yml
@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20.17.*]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 10ac8775..cf2ffbaf 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20.17.*]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index 7490c194..815f20ec 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -12,7 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20.17.*]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/.nvmrc b/.nvmrc
index 3f430af8..8cfab175 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-v18
+v20.17
diff --git a/packages/cli-alias/package.json b/packages/cli-alias/package.json
index 3f2cb49c..c8c268be 100644
--- a/packages/cli-alias/package.json
+++ b/packages/cli-alias/package.json
@@ -19,6 +19,6 @@
     "ts-node": "^10.9.1"
   },
   "engines": {
-    "node": ">=14"
+    "node": ">=20.17"
   }
 }
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 0d4b9a08..c1a69868 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -36,6 +36,6 @@
     "ts-node": "^10.9.1"
   },
   "engines": {
-    "node": ">=14"
+    "node": ">=20.17"
   }
 }
diff --git a/packages/core/package.json b/packages/core/package.json
index 9d821a82..c6ecca4f 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -28,6 +28,6 @@
     "temp": "^0.8.4"
   },
   "engines": {
-    "node": ">=14"
+    "node": ">=20.17"
   }
 }
diff --git a/packages/fetcher/package.json b/packages/fetcher/package.json
index 0900b60d..e77daa5b 100644
--- a/packages/fetcher/package.json
+++ b/packages/fetcher/package.json
@@ -22,6 +22,6 @@
     "live-plugin-manager": "^0.18.1"
   },
   "engines": {
-    "node": ">=14"
+    "node": ">=20.17"
   }
 }
diff --git a/packages/initializer/package.json b/packages/initializer/package.json
index f1b5d4cb..6b3830b3 100644
--- a/packages/initializer/package.json
+++ b/packages/initializer/package.json
@@ -14,6 +14,6 @@
     "semver": "^7.3.5"
   },
   "engines": {
-    "node": ">=14"
+    "node": ">=20.17"
   }
 }
diff --git a/packages/utils/package.json b/packages/utils/package.json
index 67f45592..96cd8554 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -7,7 +7,7 @@
   "license": "MIT",
   "repository": "https://github.com/hypermod-io/hypermod-community/tree/main/packages/utils",
   "engines": {
-    "node": ">=14"
+    "node": ">=20.17"
   },
   "dependencies": {
     "jscodeshift": "^0.13.1"
diff --git a/packages/validator/package.json b/packages/validator/package.json
index 4ca612d2..8b5bc603 100644
--- a/packages/validator/package.json
+++ b/packages/validator/package.json
@@ -15,6 +15,6 @@
     "@types/lodash": "^4.14.176"
   },
   "engines": {
-    "node": ">=14"
+    "node": ">=20.17"
   }
 }