diff --git a/.travis.yml b/.travis.yml
index 5b5c8d8..a8c2c7c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,10 +13,9 @@ before_install:
 
 install:
 - pip install --upgrade pip setuptools wheel
-- pip install -Ur requirements-dev.txt
-- python setup.py develop
 # aiohttp git repo has only *.pyx files, so install cython too.
 - '[ -z "$MASTER_AIOHTTP" ] || pip install -U cython git+https://github.com/KeepSafe/aiohttp.git'
+- pip install -Ur requirements-dev.txt
 
 before_script:
   # Start X-server for Selenium tests.
diff --git a/CHANGES.rst b/CHANGES.rst
index e3ba630..31de062 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,10 +1,16 @@
 CHANGES
 =======
 
+0.5.1 (2017-03-23)
+------------------
+
+- Enforce ``aiohttp`` version to be less than 2.0.
+  Newer ``aiohttp`` releases will be supported in the next release.
+
 0.5.0 (2016-11-18)
 ------------------
 
-- Fix compatibility with aiohttp 1.1
+- Fix compatibility with ``aiohttp`` 1.1
 
 
 0.4.0 (2016-04-04)
diff --git a/aiohttp_cors/__about__.py b/aiohttp_cors/__about__.py
index 6a0b376..9b8947a 100644
--- a/aiohttp_cors/__about__.py
+++ b/aiohttp_cors/__about__.py
@@ -19,10 +19,10 @@
 """
 
 __title__ = "aiohttp-cors"
-__version__ = "0.5.0"
+__version__ = "0.5.1"
 __author__ = "Vladimir Rutsky"
 __email__ = "vladimir@rutsky.org"
 __summary__ = "CORS support for aiohttp"
 __uri__ = "https://github.com/aio-libs/aiohttp-cors"
 __license__ = "Apache License, Version 2.0"
-__copyright__ = "2015, 2016 {}".format(__author__)
+__copyright__ = "2015, 2016, 2017 {}".format(__author__)
diff --git a/setup.py b/setup.py
index 901ad5d..875fb81 100644
--- a/setup.py
+++ b/setup.py
@@ -65,7 +65,7 @@ def read_file(filename):
     ],
     test_suite="tests",
     install_requires=[
-        "aiohttp>=1.1",
+        "aiohttp>=1.1,<2.0",
     ],
     extras_require={
         # TODO: Rich comparison in environment markers are broken in