diff --git a/requirements.txt b/requirements.txt
index 62dfc13..173e6da 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ olefile==0.44
 pathtools==0.1.2
 Pillow==4.0.0
 protobuf==3.5.0.post1
-PyYAML==3.12
+PyYAML==5.4
 requests==2.18.3
 scipy==1.0.0
 six==1.11.0