diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 7b86aa7..16569a1 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 1.3.0
+current_version = 1.4.0
 tag = False
 commit = False
 parse = ^
diff --git a/src/rxn/chemutils/__init__.py b/src/rxn/chemutils/__init__.py
index 5ea1b12..fb9f06c 100644
--- a/src/rxn/chemutils/__init__.py
+++ b/src/rxn/chemutils/__init__.py
@@ -1 +1 @@
-__version__ = "1.3.0"  # managed by bump2version
+__version__ = "1.4.0"  # managed by bump2version