diff --git a/pyproject.toml b/pyproject.toml
index f4517db..7f09ed0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "znh5md"
-version = "0.3.3"
+version = "0.3.4"
 description = "ASE Interface for the H5MD format."
 authors = ["zincwarecode <zincwarecode@gmail.com>"]
 license = "Apache-2.0"