diff --git a/requirements.txt b/requirements.txt
index 75920ac..d388c8a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 
 tornado==6.0.4
-graphql-core==3.1.0
+graphql-core==3.1.5
 PyJWT==1.7.1
 bcrypt==3.1.7
 cryptography==2.9.2