diff --git a/katana/__init__.py b/katana/__init__.py
index 0cea616..ec45e1c 100644
--- a/katana/__init__.py
+++ b/katana/__init__.py
@@ -12,4 +12,4 @@
 
 __license__ = "MIT"
 __copyright__ = "Copyright (c) 2016-2017 KUSANAGI S.L. (http://kusanagi.io)"
-__version__ = '1.0.0-beta.11'
+__version__ = '1.0.0-beta.12'
diff --git a/setup.py b/setup.py
index b747ce7..cc892db 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
     zip_safe=True,
     install_requires=[
         'click==6.4',
-        'pyzmq==16.0.2',
+        'pyzmq==15.4.0',
         'msgpack-python==0.4.7',
     ],
     classifiers=[