diff --git a/lower-constraints.txt b/lower-constraints.txt
index c874f08..c0da9ce 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -4,7 +4,7 @@
 Babel==2.5.3
 bcrypt==3.1.4
 certifi==2018.1.18
-cffi==1.11.5
+cffi==1.14.0
 chardet==3.0.4
 cliff==2.11.0
 cmd2==0.8.1
@@ -58,7 +58,7 @@
 python-mimeparse==1.6.0
 python-subunit==1.2.0
 pytz==2018.3
-PyYAML==3.12
+PyYAML==3.13
 requests==2.18.4
 requestsexceptions==1.4.0
 rfc3986==1.1.0