diff --git a/requirements.txt b/requirements.txt
index 99de505..6fc6fe1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 pymarc==3.0.3 
-PyYAML==3.11
+PyYAML==5.1
 six==1.9.0
 
 #added for rdf conversion
diff --git a/setup.py b/setup.py
old mode 100755
new mode 100644
index 37c1ff9..9054e33
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@
 
 requirements = [
     "pymarc==3.0.3",
-    "PyYAML==3.11",
+    "PyYAML==5.1",
     "six==1.9.0",
     "SPARQLWrapper==1.6.4",
     "html5lib==0.999999",