diff --git a/biobert_ner/requirements.txt b/biobert_ner/requirements.txt
index 8767869..b725e60 100644
--- a/biobert_ner/requirements.txt
+++ b/biobert_ner/requirements.txt
@@ -1,4 +1,4 @@
-aiohttp==3.5.4
+aiohttp==3.7.4
 async-timeout==3.0.1
 attrs==18.2.0
 boto3==1.9.105