diff --git a/requirements_dev.txt b/requirements_dev.txt
index f04bbf7..558df2e 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -10,4 +10,4 @@ cryptography==2.1.3
 PyYAML==3.12
 pytest==3.2.5
 pytest-runner==3.0
-requests==2.18.4
\ No newline at end of file
+requests==2.21.0
\ No newline at end of file