diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 11a497a..e2fe24a 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 1.0.3
+current_version = 1.0.4
 tag = False
 commit = False
 parse = ^
diff --git a/src/rxn/chemutils/__init__.py b/src/rxn/chemutils/__init__.py
index 181f897..2fe3ce9 100644
--- a/src/rxn/chemutils/__init__.py
+++ b/src/rxn/chemutils/__init__.py
@@ -1 +1 @@
-__version__ = "1.0.3"  # managed by bump2version
+__version__ = "1.0.4"  # managed by bump2version