diff --git a/aimsim/__init__.py b/aimsim/__init__.py
index ae892c3..0bf0d77 100644
--- a/aimsim/__init__.py
+++ b/aimsim/__init__.py
@@ -3,4 +3,4 @@
 from . import chemical_datastructures
 from . import utils
 
-__version__ = "2.1.2"
+__version__ = "2.1.3"