diff --git a/setup.py b/setup.py
index 36b63a3..4804754 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@
 dependencies = [
     'sqlalchemy >= 1.1.0b3',
     'pillow',
-    'python-magic >= 0.4.12',
+    'python-magic >= 0.4.12; (sys_platform=="linux")',
     'python-magic-bin >= 0.4.12; (sys_platform=="win32" or sys_platform=="darwin")'
 ]