diff --git a/setup.cfg b/setup.cfg
index 7e89c66..4fefdcc 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 1.3.1
+current_version = 1.4.0
 commit = True
 tag = True
 
diff --git a/stix2/version.py b/stix2/version.py
index 9c73af2..3e8d9f9 100644
--- a/stix2/version.py
+++ b/stix2/version.py
@@ -1 +1 @@
-__version__ = "1.3.1"
+__version__ = "1.4.0"