diff --git a/requirements.txt b/requirements.txt
index 8bb1ca4..938cfd0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,4 +7,4 @@
 # be installed in a specific order.
 #
 # PBR should always appear first
-pbr>=1.6 # Apache-2.0
+pbr>=1.8 # Apache-2.0