diff --git a/.travis.yml b/.travis.yml
index db720b918..aa5c30ab6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -54,6 +54,7 @@ install:
         tar -jxf ${PYPY_VERSION}.tar.bz2
         virtualenv --python="$PYPY_VERSION/bin/pypy3" "$HOME/virtualenvs/$PYPY_VERSION"
         source "$HOME/virtualenvs/$PYPY_VERSION/bin/activate"
+        pip install -U cython  # https://bitbucket.org/pypy/compatibility/wiki/lxml
       fi
   - pip install -U tox twine wheel codecov