diff --git a/em-warden-client/em-warden-client.gemspec b/em-warden-client/em-warden-client.gemspec
index 8ac101ea..36492165 100644
--- a/em-warden-client/em-warden-client.gemspec
+++ b/em-warden-client/em-warden-client.gemspec
@@ -20,5 +20,5 @@ Gem::Specification.new do |gem|
   gem.add_dependency('warden-client')
 
   gem.add_development_dependency('rake')
-  gem.add_development_dependency('rspec', "~> 2.11.0")
+  gem.add_development_dependency('rspec', "~> 3.0")
 end
diff --git a/em-warden-client/spec/fiber_aware_client_spec.rb b/em-warden-client/spec/fiber_aware_client_spec.rb
index 996e43a9..63793a86 100644
--- a/em-warden-client/spec/fiber_aware_client_spec.rb
+++ b/em-warden-client/spec/fiber_aware_client_spec.rb
@@ -12,7 +12,7 @@
           client = server.create_fiber_aware_client
           Fiber.new do
             client.connect
-            client.connected?.should be_true
+            expect(client.connected?).to be true
             EM.stop
           end.resume
         end
@@ -40,9 +40,9 @@
           client = server.create_fiber_aware_client
           Fiber.new do
             client.connect
-            client.connected?.should be_true
+            expect(client.connected?).to be true
             client.disconnect
-            client.connected?.should be_false
+            expect(client.connected?).to be false
             EM.stop
           end.resume
         end
@@ -67,7 +67,7 @@
         expected_response = Warden::Protocol::EchoResponse.new(:message => "world")
 
         handler = double()
-        handler.should_receive(request.class.type_underscored).and_return(expected_response)
+        allow(handler).to receive(request.class.type_underscored).and_return(expected_response)
         server = MockWardenServer.new(handler, socket_path)
         actual_response = nil
 
@@ -81,7 +81,7 @@
           end.resume
         end
 
-        actual_response.should == expected_response
+        expect(actual_response).to eq(expected_response)
       end
 
       it "should raise error payloads" do
@@ -89,7 +89,7 @@
         expected_response = MockWardenServer::Error.new("test error")
 
         handler = double()
-        handler.should_receive(request.class.type_underscored).and_raise(expected_response)
+        allow(handler).to receive(request.class.type_underscored).and_raise(expected_response)
         server = MockWardenServer.new(handler, socket_path)
 
         em do
@@ -124,7 +124,7 @@
         response = Warden::Protocol::EchoResponse.new(:message => "world")
 
         handler = double()
-        handler.should_receive(request.class.type_underscored).and_return(response)
+        allow(handler).to receive(request.class.type_underscored).and_return(response)
         server = MockWardenServer.new(handler, socket_path)
         actual_response = nil
 
@@ -138,7 +138,7 @@
           end.resume
         end
 
-        actual_response.should == "world"
+        expect(actual_response).to eq("world")
       end
 
       it "should raise error payloads" do
@@ -146,7 +146,7 @@
         response = MockWardenServer::Error.new("test error")
 
         handler = double()
-        handler.should_receive(request.class.type_underscored).and_raise(response)
+        allow(handler).to receive(request.class.type_underscored).and_raise(response)
         server = MockWardenServer.new(handler, socket_path)
 
         em do