diff --git a/index.js b/index.js
index 328b6af..86057ab 100755
--- a/index.js
+++ b/index.js
@@ -99,6 +99,10 @@ const sortObjectByIdent = (a, b) => {
   return 0
 }
 
+// sort deps like the npm CLI does (via the package @npmcli/package-json)
+// https://github.com/npm/package-json/blob/b6465f44c727d6513db6898c7cbe41dd355cebe8/lib/update-dependencies.js#L8-L21
+const sortDependenciesLikeNpm = sortObjectBy((a, b) => a.localeCompare(b, 'en'))
+
 // https://github.com/eslint/eslint/blob/acc0e47572a9390292b4e313b4a4bf360d236358/conf/config-schema.js
 const eslintBaseConfigProperties = [
   // `files` and `excludedFiles` are only on `overrides[]`
@@ -366,13 +370,14 @@ const fields = [
   { key: 'tap', over: sortObject },
   { key: 'oclif', over: sortObjectBy(undefined, true) },
   { key: 'resolutions', over: sortObject },
-  { key: 'dependencies', over: sortObject },
-  { key: 'devDependencies', over: sortObject },
+  { key: 'overrides', over: sortDependenciesLikeNpm },
+  { key: 'dependencies', over: sortDependenciesLikeNpm },
+  { key: 'devDependencies', over: sortDependenciesLikeNpm },
   { key: 'dependenciesMeta', over: sortObjectBy(sortObjectByIdent, true) },
-  { key: 'peerDependencies', over: sortObject },
+  { key: 'peerDependencies', over: sortDependenciesLikeNpm },
   // TODO: only sort depth = 2
   { key: 'peerDependenciesMeta', over: sortObjectBy(undefined, true) },
-  { key: 'optionalDependencies', over: sortObject },
+  { key: 'optionalDependencies', over: sortDependenciesLikeNpm },
   { key: 'bundledDependencies', over: uniqAndSortArray },
   { key: 'bundleDependencies', over: uniqAndSortArray },
   /* vscode */ { key: 'extensionPack', over: uniqAndSortArray },
diff --git a/tests/deps.js b/tests/deps.js
index 6885d7a..ffea6a8 100644
--- a/tests/deps.js
+++ b/tests/deps.js
@@ -1,4 +1,5 @@
 import test from 'ava'
+import sortPackageJson from '../index.js'
 import { macro } from './_helpers.js'
 
 // `resolutions` and `dependencies`
@@ -51,3 +52,43 @@ test('pnpm.overrides', macro.sortObjectWithRangeAlphabetically, {
   // TODO: don't use snapshot, find a esaier way for review
   expect: 'snapshot',
 })
+
+test('dependencies with capital and lowercase letters', (t) => {
+  t.deepEqual(
+    sortPackageJson({
+      dependencies: {
+        JSONStream: '^1.3.5',
+        axios: '^1.9.0',
+        'json-schema': '^0.4.0',
+      },
+    }),
+    {
+      dependencies: {
+        axios: '^1.9.0',
+        JSONStream: '^1.3.5',
+        'json-schema': '^0.4.0',
+      },
+    },
+  )
+})
+
+test('devDependencies with capital and lowercase letters', (t) => {
+  t.deepEqual(
+    sortPackageJson({
+      devDependencies: {
+        JSONStream: '^1.3.5',
+        axios: '^1.9.0',
+        'json-schema': '^0.4.0',
+        webpack: '^5.36.2',
+      },
+    }),
+    {
+      devDependencies: {
+        axios: '^1.9.0',
+        JSONStream: '^1.3.5',
+        'json-schema': '^0.4.0',
+        webpack: '^5.36.2',
+      },
+    },
+  )
+})
diff --git a/tests/snapshots/main.js.md b/tests/snapshots/main.js.md
index 4599677..01f0824 100644
--- a/tests/snapshots/main.js.md
+++ b/tests/snapshots/main.js.md
@@ -82,6 +82,7 @@ Generated by [AVA](https://avajs.dev).
         "oclif": "oclif",␊
         "optionalDependencies": "optionalDependencies",␊
         "os": "os",␊
+        "overrides": "overrides",␊
         "packageManager": "packageManager",␊
         "peerDependencies": "peerDependencies",␊
         "peerDependenciesMeta": "peerDependenciesMeta",␊
@@ -203,6 +204,7 @@ Generated by [AVA](https://avajs.dev).
         "tap": "tap",␊
         "oclif": "oclif",␊
         "resolutions": "resolutions",␊
+        "overrides": "overrides",␊
         "dependencies": "dependencies",␊
         "devDependencies": "devDependencies",␊
         "dependenciesMeta": "dependenciesMeta",␊
diff --git a/tests/snapshots/main.js.snap b/tests/snapshots/main.js.snap
index bf4f774..49dd97e 100644
Binary files a/tests/snapshots/main.js.snap and b/tests/snapshots/main.js.snap differ