ldclient-rb.gemspec in ldclient-rb-2.1.0 vs ldclient-rb.gemspec in ldclient-rb-2.1.4

@@ -31,9 +31,14 @@
   spec.add_runtime_dependency "net-http-persistent", "~> 2.9"
   spec.add_runtime_dependency "concurrent-ruby", "~> 1.0.4"
   spec.add_runtime_dependency "hashdiff", "~> 0.2"
   spec.add_runtime_dependency "ld-celluloid-eventsource", "~> 0.9.0"
   spec.add_runtime_dependency "celluloid", "~> 0.18.0.pre" # transitive dep; specified here for more control
-  spec.add_runtime_dependency "nio4r", "~> 1.1" # for maximum ruby version compatibility.
+
+  if RUBY_VERSION >= '2.2.2'
+    spec.add_runtime_dependency "nio4r", "< 3" # for maximum ruby version compatibility.
+  else
+    spec.add_runtime_dependency "nio4r", "~> 1.1" # for maximum ruby version compatibility.
+  end
 
   spec.add_runtime_dependency "waitutil", "0.2"
 end