diff --git a/README.md b/README.md
index 502665bbf..a6e4237b1 100644
--- a/README.md
+++ b/README.md
@@ -455,6 +455,7 @@ Madlang
 Max
 Makefile
 Markdown
+Mdx
 Meson
 Mint
 Mlatu
diff --git a/languages.json b/languages.json
index 3d6150f72..ed49b6347 100644
--- a/languages.json
+++ b/languages.json
@@ -977,6 +977,12 @@
     "Max": {
       "extensions": ["maxpat"]
     },
+    "Mdx": {
+      "name": "MDX",
+      "literate": true,
+      "important_syntax": ["```"],
+      "extensions": ["mdx"]
+    },
     "Menhir": {
       "nested": true,
       "quotes": [["\\\"", "\\\""]],