diff --git a/Pipfile b/Pipfile
index f5903457f589fb02d40fc4491174175d7d399740..ad580175866db1894519091fc7fa0126d9ea5f8b 100644
--- a/Pipfile
+++ b/Pipfile
@@ -41,6 +41,7 @@ funcy = "*"
 vprof = "*"
 
 [packages]
+attrs = "==19.1.0"
 aiodns = "*"
 aiohttp = "*"
 aredis = "*"