diff --git a/pyproject.toml b/pyproject.toml
index 88cd601..4f37793 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [tool.poetry]
 name = "prodigy-prot"
 license = "Apache-2.0"
-version = "2.1.5"
+version = "2.2.1"
 description = "PROtein binDIng enerGY prediction"
 authors = [
   "Computational Structural Biology Group at Utrecht University <prodigy.bonvinlab@gmail.com>",