diff --git a/requirements.dev.txt b/requirements.dev.txt
index 62a10098c8d8e6cde85e30dca0b9a06ae042d782..e3c1c5ad8eb409e83262257cc92098ce89168b9c 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -1,5 +1,5 @@
 flake8==3.7.7
-Cython==0.29.5
+Cython==0.29.6
 nose==1.3.7
 pylint==1.9.4
 pytest==4.3.0