diff --git a/homeassistant/package_constraints.txt b/homeassistant/package_constraints.txt
index 27bb10d99f5..d0a192a9dc7 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==0.15.87
+ruamel.yaml==0.15.88
 voluptuous==0.11.5
 voluptuous-serialize==2.0.0
 
diff --git a/requirements_all.txt b/requirements_all.txt
index 5925ff13596..b91036fa1f6 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==0.15.87
+ruamel.yaml==0.15.88
 voluptuous==0.11.5
 voluptuous-serialize==2.0.0
 
diff --git a/setup.py b/setup.py
index 285757ce710..52be310574a 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==0.15.87',
+    'ruamel.yaml==0.15.88',
     'voluptuous==0.11.5',
     'voluptuous-serialize==2.0.0',
 ]