diff --git a/requirements.txt b/requirements.txt
index f5d18ce9..a741fe7a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 jsonschema>=2.4.0
-aiohttp==3.5.2
+aiohttp==3.5.3
 aiohttp-cors==0.7.0
 Jinja2>=2.7.3
 raven>=5.23.0