diff --git a/gym-http-api/requirements.txt b/gym-http-api/requirements.txt
index 2a13c6a..d1a8d6d 100644
--- a/gym-http-api/requirements.txt
+++ b/gym-http-api/requirements.txt
@@ -1,4 +1,4 @@
-Flask==0.11.1
+Flask==1.0
 numpy==1.11.1rc1
 gym==0.7.4
 requests==2.11.0