diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index f6ffd809..69c84cc7 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -298,7 +298,7 @@ Cpp-ObjDump:
 
 Crystal:
   type: programming
-  lexer: ruby
+  lexer: Ruby
   primary_extension: .cr
   ace_mode: ruby