diff --git a/src/raze/ext/context.cr b/src/raze/ext/context.cr
index 6d3b7eb..10a937e 100644
--- a/src/raze/ext/context.cr
+++ b/src/raze/ext/context.cr
@@ -14,7 +14,7 @@ class HTTP::Server
 
     def params=(parameters)
       parameters.each do |key, val|
-        @params[key] = URI.unescape(val)
+        @params[key] = URI.decode(val)
       end
     end