diff --git a/innkeeper.gemspec b/innkeeper.gemspec
index f34a860..d90628e 100644
--- a/innkeeper.gemspec
+++ b/innkeeper.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency 'activerecord',    '>= 5.2.0'
   s.add_dependency 'rack',            '>= 1.3.6'
-  s.add_dependency 'public_suffix',   '~> 2.0.5'
+  s.add_dependency 'public_suffix',   '>= 2'
   s.add_dependency 'parallel',        '>= 0.7.1'
 
   s.add_development_dependency 'appraisal'