--- sdoc.gemspec.orig	2022-03-30 12:49:50 UTC
+++ sdoc.gemspec
@@ -26,7 +26,7 @@ Gem::Specification.new do |s|
   end
 
   if s.respond_to? :add_runtime_dependency then
-    s.add_runtime_dependency(%q<rdoc>.freeze, [">= 5.0", "< 6.4.0"])
+    s.add_runtime_dependency(%q<rdoc>.freeze, [">= 5.0"])
   else
     s.add_dependency(%q<rdoc>.freeze, [">= 5.0", "< 6.4.0"])
   end
