diff --git a/optional-requirements.txt b/optional-requirements.txt
index 91eb6192..9845790b 100644
--- a/optional-requirements.txt
+++ b/optional-requirements.txt
@@ -8,7 +8,7 @@ uritemplate==3.0.0
 pyasn1-modules==0.0.8
 pyasn1==0.1.9
 PyDrive==1.3.1
-PyYAML==3.12
+PyYAML==5.1
 rsa==3.4.2
 six==1.10.0