diff --git a/requirements.txt b/requirements.txt
index 303b896..5b1b3ee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,4 +12,4 @@
 requests>=2.14.2  # Apache-2.0
 six>=1.10.0 # MIT
 tempest>=17.1.0 # Apache-2.0
-tenacity>=3.2.1 # Apache-2.0
+tenacity>=4.4.0 # Apache-2.0