diff --git a/requirements-dev.txt b/requirements-dev.txt
index a18360f69..78685dc2f 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -14,7 +14,7 @@ pytest-instafail
 pytest-timeout>=1.3.1
 pytest-xdist>=1.14
 pytest>=2.9.1,<5.0  # MIT
-PyYAML>=3.13  # MIT
+PyYAML>=4.2b4  # MIT
 requests_mock  # Apache-2
 requires.io  # UNKNOWN!!!
 tenacity  # Apache-2