diff --git a/PiCamera/requirements.txt b/PiCamera/requirements.txt
index 70c515c..1c6cb1b 100644
--- a/PiCamera/requirements.txt
+++ b/PiCamera/requirements.txt
@@ -3,7 +3,7 @@ certifi==2018.4.16
 chardet==3.0.4
 futures==3.2.0
 idna==2.6
-PyYAML==3.12
+PyYAML==5.1
 requests==2.18.4
 tinys3==0.1.12
 urllib3==1.22