diff --git a/HISTORY.txt b/HISTORY.txt
index 23e380a3..5082485a 100644
--- a/HISTORY.txt
+++ b/HISTORY.txt
@@ -1,4 +1,4 @@
-18.5.12:
+2018.05.12:
  - Switch to calver for versioning.
 11.10.4:
  - Bugfix release (_mkstmp_inner backport breaks python3.4/3.5 compat)
diff --git a/pipenv/__version__.py b/pipenv/__version__.py
index ca48c4bd..7f3fb86d 100644
--- a/pipenv/__version__.py
+++ b/pipenv/__version__.py
@@ -2,4 +2,4 @@
 #   //   ) ) / / //   ) ) //___) ) //   ) ) ||  / /
 #  //___/ / / / //___/ / //       //   / /  || / /
 # //       / / //       ((____   //   / /   ||/ /
-__version__ = '11.10.4'
+__version__ = '2018.05.18'