diff --git a/pyproject.toml b/pyproject.toml
index c06dc5b..e5d3780 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,20 +34,8 @@ name = "bsb_hdf5"
 
 [tool.bumpversion]
 current_version = "4.0.0"
-parse = """(?x)
-    (?P<major>0|[1-9]\\d*)\\.
-    (?P<minor>0|[1-9]\\d*)\\.
-    (?P<patch>0|[1-9]\\d*)
-    (?:
-        -                             # dash seperator for pre-release section
-        (?P<pre_l>[a-zA-Z-]+)         # pre-release label
-        (?P<pre_n>0|[1-9]\\d*)        # pre-release version number
-    )?                                # pre-release section is optional
-"""
-serialize = [
-    "{major}.{minor}.{patch}-{pre_l}{pre_n}",
-    "{major}.{minor}.{patch}",
-]
+parse = "(?P<major>\\d+)\\.(?P<minor>\\d+)\\.(?P<patch>\\d+)"
+serialize = ["{major}.{minor}.{patch}"]
 search = "{current_version}"
 replace = "{new_version}"
 regex = false