diff --git a/graphene/signals.py b/graphene/signals.py
index ccb9ef0f..cdfa3d06 100644
--- a/graphene/signals.py
+++ b/graphene/signals.py
@@ -1,4 +1,9 @@
-from blinker import Signal
+try:
+    from blinker import Signal
+except ImportError:
+    class Signal(object):
+        def send(self, *args, **kwargs):
+            pass
 
 init_schema = Signal()
 class_prepared = Signal()
diff --git a/setup.py b/setup.py
index 4be1ad98..e8c61433 100644
--- a/setup.py
+++ b/setup.py
@@ -55,7 +55,6 @@ setup(
 
     install_requires=[
         'six>=1.10.0',
-        'blinker',
         'graphql-core==0.4.9',
         'graphql-relay==0.3.3'
     ],