diff --git a/requirements/runtime.txt b/requirements/runtime.txt
index 51035a2..24c62f7 100644
--- a/requirements/runtime.txt
+++ b/requirements/runtime.txt
@@ -1,4 +1,4 @@
 docopt==0.6.2      # Create CLI from a docstring
 semver==2.0.2      # To match semver-compliant version numbers
-PyYAML==3.11       # To parse ep.yml files
+PyYAML==5.1       # To parse ep.yml files
 wheel==0.24.0      # To package in wheel format