diff --git a/.ci/requirements.txt b/.ci/requirements.txt
index 93140b6..85872ed 100644
--- a/.ci/requirements.txt
+++ b/.ci/requirements.txt
@@ -1,4 +1,4 @@
-cython==0.27.3
+cython==0.28.2
 aiohttp
 tinys3
 twine