diff --git a/requirements.txt b/requirements.txt
index 4836630..5297ef2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ python-dateutil==2.8.1    # via matplotlib, pandas
 pytest==5.3.4
 pytest-shutil==1.7.0
 pytz==2019.3              # via pandas
-pyyaml==5.3
+pyyaml==5.4
 scipy==1.4.1              # via seaborn
 seaborn==0.10.0
 six==1.14.0               # via pyfaidx, python-dateutil, pytest