1 files changed, 1 insertions, 0 deletions

diff --git a/requirements.txt b/requirements.txt
index 39a2b0268..193c64e71 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,5 +25,6 @@ cryptography>=1.6
 cachecontrol
 pyjwt
 iso8601
+yarl>=0.11,<1.0
 aiohttp
 uvloop;python_version>='3.5'