async.gemspec in async-1.16.0 vs async.gemspec in async-1.17.0

@@ -22,10 +22,10 @@
 	
 	spec.required_ruby_version = ">= 2.2.7"
 	
 	spec.add_runtime_dependency "nio4r", "~> 2.3"
 	spec.add_runtime_dependency "timers", "~> 4.1"
-	spec.add_runtime_dependency "event", "~> 1.1"
+	spec.add_runtime_dependency "event", "~> 1.3"
 	
 	spec.add_development_dependency "async-rspec", "~> 1.1"
 	
 	spec.add_development_dependency "covered", "~> 0.10"