diff --git a/README.md b/README.md
index 4eec117..8e47eec 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ const syntax = require('postcss-syntax')({
 			extract: 'markdown',
 		},
 		{
-			test: /\.(?:m?[jt]sx?|es\d*|pac)$/i,
+			test: /\.(?:[cm]?[jt]sx?|es\d*|pac)$/i,
 			extract: 'jsx',
 		},
 		{
diff --git a/get-lang.js b/get-lang.js
index 4bc74ab..d4e3478 100644
--- a/get-lang.js
+++ b/get-lang.js
@@ -22,7 +22,7 @@ const extracts = {
 	// https://github.com/Microsoft/vscode/blob/master/extensions/javascript/package.json
 	// https://github.com/Microsoft/vscode/blob/master/extensions/typescript-basics/package.json
 	// https://github.com/michaelgmcd/vscode-language-babel/blob/master/package.json
-	jsx: /^(?:m?[jt]sx?|es\d*|pac|babel|flow)$/i,
+	jsx: /^(?:[cm]?[jt]sx?|es\d*|pac|babel|flow)$/i,
 	// *.*html?	HTML		https://github.com/Microsoft/vscode/blob/master/extensions/html/package.json
 	// *.xslt?	XSLT		https://msdn.microsoft.com/en-us/library/ms764661(v=vs.85).aspx
 	// *.vue	VUE 		https://vue-loader.vuejs.org/spec.html
diff --git a/package.json b/package.json
index 5a5d46b..0fe7e63 100644
--- a/package.json
+++ b/package.json
@@ -45,6 +45,7 @@
     ".js",
     ".es6",
     ".mjs",
+    ".cjs",
     ".pac",
     ".jsx",
     ".ts",
diff --git a/test/languages.js b/test/languages.js
index d89a4b2..47de047 100644
--- a/test/languages.js
+++ b/test/languages.js
@@ -110,11 +110,12 @@ describe("language tests", () => {
 	]);
 
 	testcase("jsx", [
-		// https://github.com/michaelgmcd/vscode-language-babel/blob/master/package.json
+		// https://github.com/Microsoft/vscode/blob/master/extensions/javascript/package.json
 		// javascript
 		".js",
 		".es6",
 		".mjs",
+		".cjs",
 		".pac",
 		// javascriptreact
 		".jsx",