diff --git a/homeassistant/package_constraints.txt b/homeassistant/package_constraints.txt
index 5b0673038bb1bc05b532f75051be293eee2c5d58..f68f16d9e9bd639fc5029e091ee0bfc72f3eb649 100644
--- a/homeassistant/package_constraints.txt
+++ b/homeassistant/package_constraints.txt
@@ -12,7 +12,7 @@ python-slugify==1.2.6
 pytz>=2018.07
 pyyaml>=3.13,<4
 requests==2.21.0
-ruamel.yaml==0.15.89
+ruamel.yaml==0.15.91
 voluptuous==0.11.5
 voluptuous-serialize==2.1.0
 
diff --git a/requirements_all.txt b/requirements_all.txt
index 8e1e69fbb22b90faac547668d218bf7b3ea9aeac..77abbdab341d771313c3534b6d1326b86ab28ef9 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -13,7 +13,7 @@ python-slugify==1.2.6
 pytz>=2018.07
 pyyaml>=3.13,<4
 requests==2.21.0
-ruamel.yaml==0.15.89
+ruamel.yaml==0.15.91
 voluptuous==0.11.5
 voluptuous-serialize==2.1.0
 
diff --git a/setup.py b/setup.py
index 0245923afb16159a6ad49a9ff9b6257b3c1a7412..2f2c310e572c5607b11769c0c9f79144aaec10f9 100755
--- a/setup.py
+++ b/setup.py
@@ -47,7 +47,7 @@ REQUIRES = [
     'pytz>=2018.07',
     'pyyaml>=3.13,<4',
     'requests==2.21.0',
-    'ruamel.yaml==0.15.89',
+    'ruamel.yaml==0.15.91',
     'voluptuous==0.11.5',
     'voluptuous-serialize==2.1.0',
 ]