diff --git a/requirements-travis.txt b/requirements-travis.txt
index e9aa072..7a07a36 100644
--- a/requirements-travis.txt
+++ b/requirements-travis.txt
@@ -1,4 +1,4 @@
 pytest==3.5.0
 Sphinx==1.7.2
-PyYAML==5.1
+PyYAML==5.3.1
 ipython==6.3.1
\ No newline at end of file