diff --git a/pyproject.toml b/pyproject.toml
index 7db010c..cabe08c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "str8ts_solver"
-version = "0.3.0"
+version = "0.4.0"
 description = "str8ts solver using z3"
 authors = [
   {email = "vil02_str8ts_solver@10g.pl"},