diff --git a/requirements.txt b/requirements.txt
index 69d4116..6afd44c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
-PyYAML>=3.10 # MIT
+PyYAML>=3.12 # MIT
 six>=1.10.0 # MIT
 sphinx!=1.6.6,>=1.6.2 # BSD
 openstackdocstheme>=1.18.1 # Apache-2.0