diff --git a/pyproject.toml b/pyproject.toml
index 4364fedc..e6b5b65b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "alns"
-version = "5.3.0"
+version = "5.3.1"
 description = "A flexible implementation of the adaptive large neighbourhood search (ALNS) algorithm."
 authors = ["Niels Wouda <nielswouda@gmail.com>"]
 license = "MIT"