cffi 1.10 not yet supported

.travis.yml

@@ -13,7 +13,7 @@ env: LIBGIT2=~/libgit2/_install/ LD_LIBRARY_PATH=~/libgit2/_install/lib
 
 before_install:
   - sudo apt-get install cmake
-  - pip install cffi
+  - pip install cffi==1.9.1
   - "./.travis.sh"
 
 script:

setup.py

@@ -203,8 +203,8 @@ setup(name='pygit2',
       long_description=long_description,
       packages=['pygit2'],
       package_data={'pygit2': ['decl.h']},
-      setup_requires=['cffi'],
-      install_requires=['cffi', 'six'],
+      setup_requires=['cffi<1.10'],
+      install_requires=['cffi<1.10', 'six'],
       zip_safe=False,
       cmdclass=cmdclass,
       **extra_args)