diff --git a/requirements.txt b/requirements.txt
index f40d4d3..688eed0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ python-gflags==3.1.1
 python-Levenshtein==0.12.0
 pytz==2017.2
 PyWavelets==0.5.2
-PyYAML==3.12
+PyYAML==5.4
 scikit-image==0.13.0
 scipy==0.19.0
 six==1.10.0