diff --git a/requirements.txt b/requirements.txt
index 4c26f8a..4c26afb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 docopt==0.6.2
-pyyaml==3.11
+pyyaml==5.1
 tox==1.9.0