diff --git a/stance/more-classifiers/requirements.txt b/stance/more-classifiers/requirements.txt
index d4276e2..628b272 100644
--- a/stance/more-classifiers/requirements.txt
+++ b/stance/more-classifiers/requirements.txt
@@ -27,7 +27,7 @@ pandas==0.22.0
 protobuf==3.6.0
 python-dateutil==2.7.3
 pytz==2018.5
-PyYAML==3.12
+PyYAML==5.4
 requests==2.19.1
 s3transfer==0.1.13
 scikit-learn==0.19.1