diff --git a/requirements/dev.txt b/requirements/dev.txt
index a1269b9..9565766 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -10,6 +10,6 @@ pytest-mock==1.10.0
 pytest-pythonpath==0.7.2
 pytest-cov==2.5.1
 flake8==3.5.0
-PyYAML==5.3
+PyYAML==5.4
 Sphinx==1.7.6
 phix==0.6.1
\ No newline at end of file
diff --git a/setup.py b/setup.py
index f5e5464..898efbc 100644
--- a/setup.py
+++ b/setup.py
@@ -35,7 +35,7 @@
     install_requires=[
         'click>=5.1',
         'click-log',
-        'PyYAML >= 4.3, <= 5.3',
+        'PyYAML >= 4.3, < 5.5',
         'Jinja2>=2.10',
         'docker[ssh] >= 5',
         'docker-compose >= 1.29'