diff --git a/requirements.txt b/requirements.txt
index 0dcbc92..31f9449 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 mock==2.0.0; python_version < '3.0'
-pyobjc-core==4.1; sys_platform == 'darwin'
+pyobjc-core==10.3.1; sys_platform == 'darwin'
 pytest==3.5.0
 pytest-cov==2.5.1
 unittest2==1.1.0; python_version < '3.0'