diff --git a/requirements.dev.txt b/requirements.dev.txt
index 274da28bf0c888b583cf5ab8a9492e3b20a2c9de..54d2f4a34256b37b5ce9cccc40f860e847fa6cb6 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -1,5 +1,5 @@
 flake8==3.7.5
-Cython==0.29.4
+Cython==0.29.5
 nose==1.3.7
 pylint==1.9.4
 pytest==4.2.0