diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 8b6d0831..765e6e96 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1032,10 +1032,11 @@ RHTML:
 
 Racket:
   type: programming
-  lexer: Scheme
+  lexer: Racket
   color: "#ae17ff"
   primary_extension: .rkt
   extensions:
+  - .rkt
   - .rktd
   - .rktl