diff --git a/setup.py b/setup.py
index 3a1ef9a..384da8b 100755
--- a/setup.py
+++ b/setup.py
@@ -131,7 +131,7 @@ setup(
         'nose',
         'scripttest',
         'mock',
-        'hypothesis',
+        'hypothesis!=3.56.9',
         'flake8'
     ],
     cmdclass={'test': Tox},
diff --git a/tox.ini b/tox.ini
index 777391f..6142681 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,7 +10,7 @@ deps = nose
        pytest!=3.2.0,!=3.3.0
        pytest-cov
        pytest-mock
-       hypothesis
+       hypothesis!=3.56.9
        viivakoodi
 commands = py.test --cov escpos