diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index dd0f3900..6c67bd0f 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1022,7 +1022,8 @@ Markdown:
 
 Mathematica:
   type: programming
-  primary_extension: .m
+  primary_extension: .mathematica
+  lexer: Text only
 
 Matlab:
   type: programming