diff --git a/mustermann/lib/mustermann/ast/translator.rb b/mustermann/lib/mustermann/ast/translator.rb
index 505dec0..33b8a7d 100644
--- a/mustermann/lib/mustermann/ast/translator.rb
+++ b/mustermann/lib/mustermann/ast/translator.rb
@@ -118,7 +118,7 @@ def decorator_for(node)
 
       # @return [String] escaped character
       # @!visibility private
-      def escape(char, parser: URI::DEFAULT_PARSER, escape: URI::RFC2396_Parser.new.regexp[:UNSAFE], also_escape: nil)
+      def escape(char, parser: URI::RFC2396_Parser.new, escape: URI::RFC2396_Parser.new.regexp[:UNSAFE], also_escape: nil)
         escape = Regexp.union(also_escape, escape) if also_escape
         char.to_s =~ escape ? parser.escape(char, Regexp.union(*escape)) : char
       end
diff --git a/mustermann/lib/mustermann/pattern.rb b/mustermann/lib/mustermann/pattern.rb
index cc15187..f9ecd01 100644
--- a/mustermann/lib/mustermann/pattern.rb
+++ b/mustermann/lib/mustermann/pattern.rb
@@ -9,7 +9,7 @@ module Mustermann
   # @abstract
   class Pattern
     include Mustermann
-    @@uri ||= URI::Parser.new
+    @@uri ||= URI::RFC2396_Parser.new
 
     # List of supported options.
     #