diff --git a/fake_tunnel_connector/fake_tunnel_connector.rb b/fake_tunnel_connector/fake_tunnel_connector.rb
index e23ed6e..a5ac7b4 100644
--- a/fake_tunnel_connector/fake_tunnel_connector.rb
+++ b/fake_tunnel_connector/fake_tunnel_connector.rb
@@ -5,7 +5,7 @@ require 'time'
 class FakeTunnelConnector
   attr_accessor :port, :server, :ssl_context
 
-  CRLF = "\r\n"
+  CRLF = "\r\n".freeze
 
   def initialize(port, ssl_context = nil)
     @port = port
@@ -91,7 +91,7 @@ class FakeTunnelConnector
   end
 
   def ok_headers
-    "HTTP/1.1 200 OK\r\n" +
+    "HTTP/1.1 200 OK#{CRLF}" +
       "Date: #{Time.now.utc}#{CRLF}" +
      CRLF 
   end
@@ -128,6 +128,6 @@ class FakeTunnelConnector
 
   def login
     body = '{"token":"3b51619a125d90cd0778bd4c02cd7be34de6dc9268eecd25"}'
-    ok(body) 
+    ok(body)
   end
 end