diff --git a/tools/lint b/tools/lint
index b38b58319a..19b000bd50 100755
--- a/tools/lint
+++ b/tools/lint
@@ -145,7 +145,7 @@ def run() -> None:
     linter_config.external_linter(
         "prettier",
         ["node_modules/.bin/prettier", "--check", "--loglevel=warn"],
-        ["css", "flow", "js", "json", "ts", "yaml", "yml"],
+        ["css", "flow", "js", "json", "md", "ts", "yaml", "yml"],
         fix_arg=["--write"],
         description="Formats CSS, JavaScript, YAML",
     )