diff --git a/dev_requirements.txt b/dev_requirements.txt
index 81b5248..b0f4733 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -10,3 +10,4 @@ pytest==7.2
 pytest-cov==4.0
 pytest-datafiles==2.0
 types-setuptools==65.6.0.2
+types-PyYAML