diff --git a/lib/final_destination.rb b/lib/final_destination.rb
index d4e625730c2..5909640c154 100644
--- a/lib/final_destination.rb
+++ b/lib/final_destination.rb
@@ -202,7 +202,7 @@ class FinalDestination
     end
 
     headers = request_headers
-    middlewares = Excon.defaults[:middlewares]
+    middlewares = Excon.defaults[:middlewares].dup
     middlewares << Excon::Middleware::Decompress if @http_verb == :get
 
     request_start_time = Time.now