diff --git a/pipenv/vendor/vendor.txt b/pipenv/vendor/vendor.txt
index 3519f147..64d914cd 100644
--- a/pipenv/vendor/vendor.txt
+++ b/pipenv/vendor/vendor.txt
@@ -7,7 +7,6 @@ colorama==0.4.4
 distlib==0.3.2
 dparse==0.5.1
 idna==3.2
-iso8601==0.1.16
 markupsafe==2.0.1
 parse==1.19.0
 pexpect==4.8.0