diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index c74f6a94..d8c82866 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -826,7 +826,7 @@ Perl:
   - .psgi
   - .t
 
-Powershell:
+PowerShell:
   type: programming
   lexer: Text only
   ace_mode: powershell