diff --git a/pipenv/vendor/vendor.txt b/pipenv/vendor/vendor.txt
index c70ebc07..aa1e3126 100644
--- a/pipenv/vendor/vendor.txt
+++ b/pipenv/vendor/vendor.txt
@@ -27,7 +27,7 @@ requests==2.19.1
     idna==2.7
     urllib3==1.23
     certifi==2018.4.16
-requirementslib==1.0.3
+requirementslib==1.0.4
     attrs==18.1.0
     distlib==0.2.7
     packaging==17.1