diff --git a/.travis.yml b/.travis.yml
index 82eb62f..777dea6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,7 @@ install:
   - export LIBRARY_PATH="$LIBRARY_PATH:$PYTHON_LIB"
   - export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$PYTHON_LIB:$HOME/rust/lib"
   - rustc -V
-  - python -m pip install --upgrade setuptools
-  - pip install -r requirements-ci.txt
+  - pip install --upgrade setuptools
+  - pip install -U -r requirements-dev.txt
 script:
   - make test
diff --git a/CHANGES.rst b/CHANGES.rst
index 942548a..126024d 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -7,6 +7,8 @@ CHANGES
 
 * Added weakref support to all exposed python classes #13
 
+* Enable python3.5
+
 
 0.2.0 (07-23-2017)
 ^^^^^^^^^^^^^^^^^^
@@ -15,6 +17,7 @@ CHANGES
 
 * Implement more asyncio APIs
 
+
 0.1.0
 ^^^^^
 
diff --git a/Makefile b/Makefile
index 93d4d3c..a430e45 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 
 .install-deps: requirements-dev.txt requirements-ci.txt
 	@pip install -U -r requirements-dev.txt
-        @touch .install-deps
+	@touch .install-deps
 
 isort:
 # isort -rc tokio
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9245e70..7e97e37 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,4 @@
 -r requirements-ci.txt
-setuptools==36.2.2
 ipdb==0.10.3
 pytest-sugar==0.8.0
 ipython==6.1.0
diff --git a/setup.py b/setup.py
index 15e4393..dac1bb5 100644
--- a/setup.py
+++ b/setup.py
@@ -44,8 +44,8 @@ def run(self):
 tests_require = install_requires + ['pytest', 'pytest-timeout']
 
 
-if sys.version_info < (3, 6, 0):
-    raise RuntimeError("tokio requires Python 3.6+")
+if sys.version_info < (3, 5, 3):
+    raise RuntimeError("tokio requires Python 3.5.3+")
 
 
 def read(f):