diff --git a/requirements.txt b/requirements.txt
index 8a3e83605..e34ea40aa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-boto3==1.5.15
+boto3==1.5.21
 cffi==1.11.0 # pyup: != 1.11.1, != 1.11.2 # These versions are missing .whl
 celery==3.1.25 # pyup: <4
 docopt==0.6.2