diff --git a/shard.yml b/shard.yml
index 47654bb..2e83cec 100644
--- a/shard.yml
+++ b/shard.yml
@@ -1,5 +1,5 @@
 name: tartrazine
-version: 0.4.0
+version: 0.5.1
 
 authors:
   - Roberto Alsina <roberto.alsina@gmail.com>
diff --git a/src/formatters/ansi.cr b/src/formatters/ansi.cr
index 8efeb25..fc9e608 100644
--- a/src/formatters/ansi.cr
+++ b/src/formatters/ansi.cr
@@ -14,7 +14,7 @@ module Tartrazine
     def format(text : String, lexer : Lexer) : String
       outp = String::Builder.new("")
       format(text, lexer, outp)
-      return outp.to_s
+      outp.to_s
     end
 
     def format(text : String, lexer : Lexer, outp : IO) : Nil
diff --git a/src/formatters/html.cr b/src/formatters/html.cr
index 4217cdd..6fab641 100644
--- a/src/formatters/html.cr
+++ b/src/formatters/html.cr
@@ -37,10 +37,9 @@ module Tartrazine
     def format(text : String, lexer : Lexer) : String
       outp = String::Builder.new("")
       format(text, lexer, outp)
-      return outp.to_s
+      outp.to_s
     end
 
-
     def format(text : String, lexer : Lexer, io : IO) : Nil
       pre, post = wrap_standalone
       io << pre if standalone?
diff --git a/src/formatters/json.cr b/src/formatters/json.cr
index c9d6a39..5ba28ea 100644
--- a/src/formatters/json.cr
+++ b/src/formatters/json.cr
@@ -7,10 +7,9 @@ module Tartrazine
     def format(text : String, lexer : Lexer) : String
       outp = String::Builder.new("")
       format(text, lexer, outp)
-      return outp.to_s
+      outp.to_s
     end
 
-
     def format(text : String, lexer : Lexer, io : IO) : Nil
       tokenizer = Tokenizer.new(lexer, text)
       io << Tartrazine::Lexer.collapse_tokens(tokenizer.to_a).to_json