diff --git a/requirements.txt b/requirements.txt
index bc6dc4dc00..b9267761b4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,4 +9,4 @@ requests # Apache-2.0
 requests-oauthlib # ISC
 oauthlib>=3.2.2 # BSD
 urllib3>=1.24.2  # MIT
-durationpy>=0.7 # MIT
+durationpy>=0.9 # MIT