diff --git a/js-packages/@fortawesome/fontawesome-svg-core/index.es.js b/js-packages/@fortawesome/fontawesome-svg-core/index.mjs
similarity index 100%
rename from js-packages/@fortawesome/fontawesome-svg-core/index.es.js
rename to js-packages/@fortawesome/fontawesome-svg-core/index.mjs
diff --git a/js-packages/@fortawesome/fontawesome-svg-core/package.json b/js-packages/@fortawesome/fontawesome-svg-core/package.json
index 79c40da56..4a72af5bb 100644
--- a/js-packages/@fortawesome/fontawesome-svg-core/package.json
+++ b/js-packages/@fortawesome/fontawesome-svg-core/package.json
@@ -26,35 +26,35 @@
   "version": "6.1.1",
   "name": "@fortawesome/fontawesome-svg-core",
   "main": "index.js",
-  "module": "index.es.js",
-  "jsnext:main": "index.es.js",
+  "module": "index.mjs",
+  "jsnext:main": "index.mjs",
   "style": "styles.css",
   "license": "MIT",
   "types": "./index.d.ts",
   "exports": {
     ".": {
-      "module": "./index.es.js",
-      "import": "./index.es.js",
+      "module": "./index.mjs",
+      "import": "./index.mjs",
       "require": "./index.js",
       "style": "./styles.css",
       "default": "./index.js"
     },
     "./index": {
-      "module": "./index.es.js",
-      "import": "./index.es.js",
+      "module": "./index.mjs",
+      "import": "./index.mjs",
       "require": "./index.js",
       "default": "./index.js"
     },
     "./index.js": {
-      "module": "./index.es.js",
-      "import": "./index.es.js",
+      "module": "./index.mjs",
+      "import": "./index.mjs",
       "require": "./index.js",
       "default": "./index.js"
     },
     "./plugins": {
-      "module": "./plugins.es.js",
-      "import": "./plugins.es.js",
-      "default": "./plugins.es.js"
+      "module": "./plugins.mjs",
+      "import": "./plugins.mjs",
+      "default": "./plugins.mjs"
     },
     "./import.macro": "./import.macro.js",
     "./import.macro.js": "./import.macro.js",
@@ -64,7 +64,7 @@
   },
   "sideEffects": [
     "./index.js",
-    "./index.es.js",
+    "./index.mjs",
     "./styles.css"
   ],
   "scripts": {
diff --git a/js-packages/@fortawesome/fontawesome-svg-core/plugins.es.js b/js-packages/@fortawesome/fontawesome-svg-core/plugins.mjs
similarity index 100%
rename from js-packages/@fortawesome/fontawesome-svg-core/plugins.es.js
rename to js-packages/@fortawesome/fontawesome-svg-core/plugins.mjs
diff --git a/js-packages/@fortawesome/free-brands-svg-icons/index.es.js b/js-packages/@fortawesome/free-brands-svg-icons/index.mjs
similarity index 100%
rename from js-packages/@fortawesome/free-brands-svg-icons/index.es.js
rename to js-packages/@fortawesome/free-brands-svg-icons/index.mjs
diff --git a/js-packages/@fortawesome/free-brands-svg-icons/package.json b/js-packages/@fortawesome/free-brands-svg-icons/package.json
index 241f7d43d..96c4505cd 100644
--- a/js-packages/@fortawesome/free-brands-svg-icons/package.json
+++ b/js-packages/@fortawesome/free-brands-svg-icons/package.json
@@ -26,24 +26,24 @@
   "version": "6.1.1",
   "name": "@fortawesome/free-brands-svg-icons",
   "main": "index.js",
-  "module": "index.es.js",
-  "jsnext:main": "index.es.js",
+  "module": "index.mjs",
+  "jsnext:main": "index.mjs",
   "license": "(CC-BY-4.0 AND MIT)",
   "types": "./index.d.ts",
   "sideEffects": false,
   "exports": {
     ".": {
-      "import": "./index.es.js",
+      "import": "./index.mjs",
       "require": "./index.js",
       "default": "./index.js"
     },
     "./index": {
-      "import": "./index.es.js",
+      "import": "./index.mjs",
       "require": "./index.js",
       "default": "./index.js"
     },
     "./index.js": {
-      "import": "./index.es.js",
+      "import": "./index.mjs",
       "require": "./index.js",
       "default": "./index.js"
     },
diff --git a/js-packages/@fortawesome/free-regular-svg-icons/index.es.js b/js-packages/@fortawesome/free-regular-svg-icons/index.mjs
similarity index 100%
rename from js-packages/@fortawesome/free-regular-svg-icons/index.es.js
rename to js-packages/@fortawesome/free-regular-svg-icons/index.mjs
diff --git a/js-packages/@fortawesome/free-regular-svg-icons/package.json b/js-packages/@fortawesome/free-regular-svg-icons/package.json
index 28897e8e4..ebb6d7d64 100644
--- a/js-packages/@fortawesome/free-regular-svg-icons/package.json
+++ b/js-packages/@fortawesome/free-regular-svg-icons/package.json
@@ -26,24 +26,24 @@
   "version": "6.1.1",
   "name": "@fortawesome/free-regular-svg-icons",
   "main": "index.js",
-  "module": "index.es.js",
-  "jsnext:main": "index.es.js",
+  "module": "index.mjs",
+  "jsnext:main": "index.mjs",
   "license": "(CC-BY-4.0 AND MIT)",
   "types": "./index.d.ts",
   "sideEffects": false,
   "exports": {
     ".": {
-      "import": "./index.es.js",
+      "import": "./index.mjs",
       "require": "./index.js",
       "default": "./index.js"
     },
     "./index": {
-      "import": "./index.es.js",
+      "import": "./index.mjs",
       "require": "./index.js",
       "default": "./index.js"
     },
     "./index.js": {
-      "import": "./index.es.js",
+      "import": "./index.mjs",
       "require": "./index.js",
       "default": "./index.js"
     },
diff --git a/js-packages/@fortawesome/free-solid-svg-icons/index.es.js b/js-packages/@fortawesome/free-solid-svg-icons/index.mjs
similarity index 100%
rename from js-packages/@fortawesome/free-solid-svg-icons/index.es.js
rename to js-packages/@fortawesome/free-solid-svg-icons/index.mjs
diff --git a/js-packages/@fortawesome/free-solid-svg-icons/package.json b/js-packages/@fortawesome/free-solid-svg-icons/package.json
index 983947226..22bbb871b 100644
--- a/js-packages/@fortawesome/free-solid-svg-icons/package.json
+++ b/js-packages/@fortawesome/free-solid-svg-icons/package.json
@@ -26,24 +26,24 @@
   "version": "6.1.1",
   "name": "@fortawesome/free-solid-svg-icons",
   "main": "index.js",
-  "module": "index.es.js",
-  "jsnext:main": "index.es.js",
+  "module": "index.mjs",
+  "jsnext:main": "index.mjs",
   "license": "(CC-BY-4.0 AND MIT)",
   "types": "./index.d.ts",
   "sideEffects": false,
   "exports": {
     ".": {
-      "import": "./index.es.js",
+      "import": "./index.mjs",
       "require": "./index.js",
       "default": "./index.js"
     },
     "./index": {
-      "import": "./index.es.js",
+      "import": "./index.mjs",
       "require": "./index.js",
       "default": "./index.js"
     },
     "./index.js": {
-      "import": "./index.es.js",
+      "import": "./index.mjs",
       "require": "./index.js",
       "default": "./index.js"
     },