diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 7c55a2a..c995a72
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ pytest==3.8.0
 pytest-cov==2.6.0
 python-afl==0.7.1
 pytz==2018.5
-PyYAML==4.2b1
+PyYAML==5.4
 requests==2.19.1
 six==1.11.0
 snowballstemmer==1.2.1