diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 9968dac1..e21dfbf4 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -236,11 +236,11 @@ ChucK:
   primary_extension: .ck
 
 Clean:
-	type: programming
-	color: "#3a81ad"
-	primary_extension: .icl
-	extensions:
-	- .dcl
+  type: programming
+  color: "#3a81ad"
+  primary_extension: .icl
+  extensions:
+  - .dcl
 
 Clojure:
   type: programming