diff --git a/pdm.lock b/pdm.lock
index de8ca95..ef7827f 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -5,7 +5,7 @@
 groups = ["default", "dev", "lint", "nb", "tests"]
 strategy = ["inherit_metadata"]
 lock_version = "4.5.0"
-content_hash = "sha256:58003d8d013a90ffc3a883bfbb6d307718a03b4103c40ece3c56c5ef78fb27ad"
+content_hash = "sha256:d51351adbafc599b97f8b3c9047ad0c7b8607d47cff5874121f546af04793ee2"
 
 [[metadata.targets]]
 requires_python = ">=3.11"
@@ -225,7 +225,7 @@ files = [
 
 [[package]]
 name = "bump-my-version"
-version = "0.32.1"
+version = "1.1.1"
 requires_python = ">=3.8"
 summary = "Version bump your Python project"
 groups = ["dev"]
@@ -241,8 +241,8 @@ dependencies = [
     "wcmatch>=8.5.1",
 ]
 files = [
-    {file = "bump_my_version-0.32.1-py3-none-any.whl", hash = "sha256:76605d0f98d0627b4cff972b4fcd56ff5423357047d954421fe6b721304e5ceb"},
-    {file = "bump_my_version-0.32.1.tar.gz", hash = "sha256:cb537096cba01a2832972902bfff9e0e0d6e8f8dc9fe31c742096a331262e2aa"},
+    {file = "bump_my_version-1.1.1-py3-none-any.whl", hash = "sha256:6bd78e20421f6335c1a49d7e85a2f16ae8966897d0a2dd130a0e8b6b55954686"},
+    {file = "bump_my_version-1.1.1.tar.gz", hash = "sha256:2f590e0eabe894196289c296c52170559c09876454514ae8fce5db75bd47289e"},
 ]
 
 [[package]]
diff --git a/pyproject.toml b/pyproject.toml
index 4c4fbd1..31bc993 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "delta-barth"
-version = "0.3.4"
+version = "0.4.0dev0"
 description = "workflows and pipelines for the Python-based Plugin of Delta Barth's ERP system"
 authors = [
     {name = "Florian Förster", email = "f.foerster@d-opt.com"},
@@ -73,7 +73,7 @@ directory = "reports/coverage"
 
 
 [tool.bumpversion]
-current_version = "0.1.1"
+current_version = "0.4.0dev0"
 parse = """(?x)
     (?P<major>0|[1-9]\\d*)\\.
     (?P<minor>0|[1-9]\\d*)\\.
@@ -106,7 +106,7 @@ pre_commit_hooks = []
 post_commit_hooks = []
 
 [tool.bumpversion.parts.pre_l]
-values = ["dev", "a", "b", "rc", "final"]
+values = ["dev", "rc", "final"]
 optional_value = "final"
 
 [[tool.bumpversion.files]]
@@ -143,7 +143,7 @@ lint = [
 ]
 dev = [
     "pdoc3>=0.11.5",
-    "bump-my-version>=0.32.1",
+    "bump-my-version>=1.1.1",
     "nox>=2025.2.9",
 ]
 nb = [