diff --git a/.travis.yml b/.travis.yml
index ccdc531..8a86493 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,6 +15,6 @@ matrix:
       before_install: pip install cython
       script: python setup.py build_ext
     - language: python
-      python: "3.7"
+      python: "3.6"
       before_install: pip install cython
       script: python setup.py build_ext