diff --git a/requirements/constraints.txt b/requirements/constraints.txt
index cd7cceb4f..7098c7a60 100644
--- a/requirements/constraints.txt
+++ b/requirements/constraints.txt
@@ -295,9 +295,9 @@ bcrypt==3.1.4 \
 colander==1.5.1 \
     --hash=sha256:2358303aa04cca0e1865323ce253e65d25f6307d12bade89dbe1aa4e60197d4b \
     --hash=sha256:d86b9e1fb42c80c68b26040e32dad584aa168abf3175133b36f5dace392350a1
-requests==2.20.1 \
-    --hash=sha256:65b3a120e4329e33c9889db89c80976c5272f56ea92d3e74da8a463992e3ff54 \
-    --hash=sha256:ea881206e59f41dbd0bd445437d792e43906703fff75ca8ff43ccdb11f33f263
+requests==2.21.0 \
+    --hash=sha256:7bf2a778576d825600030a110f3c0e3e8edc51dfaafe1c146e39a2027784957b \
+    --hash=sha256:502a824f31acdacb3a35b6690b5fbf0bc41d63a24a45c4004352b0242707598e
 dockerflow==2018.4.0 \
     --hash=sha256:2ea52a904abfda3430ff4f1effc164863b30d2b69f7ecbf92dd672860b0ec423 \
     --hash=sha256:388d02c557968e6957140f7b82f669eac70adf5f570bc7705aa749d220a2e535