diff --git a/build.py b/build.py
index 85882cd..bf11dda 100644
--- a/build.py
+++ b/build.py
@@ -33,7 +33,7 @@ default_task = "dev"
 name = "ddadevops"
 MODULE = "not-used"
 PROJECT_ROOT_PATH = "."
-version = "4.0.11-SNAPSHOT"
+version = "4.0.11-dev1"
 summary = "tools to support builds combining gopass, terraform, dda-pallet, aws & hetzner-cloud"
 description = __doc__
 authors = [Author("meissa GmbH", "buero@meissa-gmbh.de")]
diff --git a/doc/architecture/Domain.md b/doc/architecture/Domain.md
index e35af13..7e76a96 100644
--- a/doc/architecture/Domain.md
+++ b/doc/architecture/Domain.md
@@ -87,7 +87,6 @@ classDiagram
         release_type
         release_main_branch
         release_current_branch
-        version
     }
     class Credentials {
         <<AggregateRoot>>
@@ -130,7 +129,8 @@ classDiagram
     TerraformDomain *-- "0..1" ProviderAws: providers
     Release o-- "0..1" BuildFile: primary_build_file
     Release o-- "0..n" BuildFile: secondary_build_files
-    BuildFile *-- "1" Version
+    Release "1" *-- "1" Version: version
+    BuildFile *-- "1" Version: version
     C4k *-- DnsRecord: dns_record
     ProvsK3s *-- DnsRecord: provision_dns
     Credentials *-- "0..n" CredentialMapping: mappings[name]
diff --git a/src/main/python/ddadevops/application/release_mixin_services.py b/src/main/python/ddadevops/application/release_mixin_services.py
index b440eaa..c9ab06e 100644
--- a/src/main/python/ddadevops/application/release_mixin_services.py
+++ b/src/main/python/ddadevops/application/release_mixin_services.py
@@ -42,7 +42,7 @@ class ReleaseService:
                 release_version = release.version.create_patch()
             case _:
                 return
-        bump_version = release_version.create_bump("SNAPSHOT")
+        bump_version = release_version.create_bump()
         release_message = f"release: {release_version.to_string()}"
         bump_message = f"bump version to: {bump_version.to_string()}"
         self.git_api.tag_annotated(release_version.to_string(), release_message, 0)
diff --git a/src/main/python/ddadevops/domain/build_file.py b/src/main/python/ddadevops/domain/build_file.py
index c4056a0..350a4a9 100644
--- a/src/main/python/ddadevops/domain/build_file.py
+++ b/src/main/python/ddadevops/domain/build_file.py
@@ -1,6 +1,7 @@
 import json
 import re
 from enum import Enum
+from typing import Optional
 from pathlib import Path
 from .common import Validateable
 from .version import Version
@@ -26,9 +27,10 @@ class BuildFile(Validateable):
             result += [f"Suffix {self.file_path} is unknown."]
         return result
 
-    def build_file_type(self):
+    def build_file_type(self) -> Optional[BuildFileType]:
+        result: Optional[BuildFileType] = None
         if not self.file_path:
-            return None
+            return result
         config_file_type = self.file_path.suffix
         match config_file_type:
             case ".json":
@@ -76,7 +78,7 @@ class BuildFile(Validateable):
         except:
             raise Exception(f"Version not found in file {self.file_path}")
 
-        result = Version.from_str(version_str)
+        result = Version.from_str(version_str, self.get_default_suffix())
         result.throw_if_invalid()
 
         return result
@@ -115,6 +117,13 @@ class BuildFile(Validateable):
         except:
             raise Exception(f"Version not found in file {self.file_path}")
 
+    def get_default_suffix(self) -> str:
+        result = "SNAPSHOT"
+        match self.build_file_type():
+            case BuildFileType.PYTHON:
+                result = "dev"
+        return result
+
     def __eq__(self, other):
         return other and self.file_path == other.file_path
 
diff --git a/src/main/python/ddadevops/domain/version.py b/src/main/python/ddadevops/domain/version.py
index 7fd8b73..2f2096a 100644
--- a/src/main/python/ddadevops/domain/version.py
+++ b/src/main/python/ddadevops/domain/version.py
@@ -6,7 +6,7 @@ from .common import (
 
 class Version(Validateable):
     @classmethod
-    def from_str(cls, input_str: str):
+    def from_str(cls, input_str: str, default_snapshot_suffix):
         snapshot_parsed = input_str.split("-")
         version_str = snapshot_parsed[0]
         suffix_str = None
@@ -15,6 +15,7 @@ class Version(Validateable):
         version_no_parsed = [int(x) for x in version_str.split(".")]
         return cls(
             version_no_parsed,
+            default_snapshot_suffix,
             suffix_str,
             input_str,
         )
@@ -22,12 +23,14 @@ class Version(Validateable):
     def __init__(
         self,
         version_list: list,
+        default_snapshot_suffix: str,
         snapshot_suffix: Optional[str] = None,
         version_str: Optional[str] = None,
     ):
         self.version_list = version_list
-        self.snapshot_suffix = snapshot_suffix
         self.version_string = version_str
+        self.snapshot_suffix = snapshot_suffix
+        self.default_snapshot_suffix = default_snapshot_suffix
 
     def __eq__(self, other):
         return other and self.to_string() == other.to_string()
@@ -47,6 +50,7 @@ class Version(Validateable):
     def validate(self):
         result = []
         result += self.__validate_is_not_empty__("version_list")
+        result += self.__validate_is_not_empty__("default_snapshot_suffix")
         if self.version_list and len(self.version_list) < 3:
             result += ["version_list must have at least 3 levels."]
         if (
@@ -59,41 +63,79 @@ class Version(Validateable):
             ]
         return result
 
-    def create_bump(self, snapshot_suffix: Optional[str] = None):
+    def create_bump(self):
+        tmp_snapshot_suffix = self.default_snapshot_suffix
+
         new_version_list = self.version_list.copy()
         if self.is_snapshot():
             return Version(
-                new_version_list, snapshot_suffix=self.snapshot_suffix, version_str=None
+                new_version_list,
+                self.default_snapshot_suffix,
+                snapshot_suffix=tmp_snapshot_suffix,
+                version_str=None,
             )
         else:
             new_version_list[2] += 1
             return Version(
-                new_version_list, snapshot_suffix=snapshot_suffix, version_str=None
+                new_version_list,
+                self.default_snapshot_suffix,
+                snapshot_suffix=tmp_snapshot_suffix,
+                version_str=None,
             )
 
     def create_patch(self):
         new_version_list = self.version_list.copy()
         if self.is_snapshot():
-            return Version(new_version_list, snapshot_suffix=None, version_str=None)
+            return Version(
+                new_version_list,
+                self.default_snapshot_suffix,
+                snapshot_suffix=None,
+                version_str=None,
+            )
         else:
             new_version_list[2] += 1
-            return Version(new_version_list, snapshot_suffix=None, version_str=None)
+            return Version(
+                new_version_list,
+                self.default_snapshot_suffix,
+                snapshot_suffix=None,
+                version_str=None,
+            )
 
     def create_minor(self):
         new_version_list = self.version_list.copy()
         if self.is_snapshot() and new_version_list[2] == 0:
-            return Version(new_version_list, snapshot_suffix=None, version_str=None)
+            return Version(
+                new_version_list,
+                self.default_snapshot_suffix,
+                snapshot_suffix=None,
+                version_str=None,
+            )
         else:
             new_version_list[2] = 0
             new_version_list[1] += 1
-            return Version(new_version_list, snapshot_suffix=None, version_str=None)
+            return Version(
+                new_version_list,
+                self.default_snapshot_suffix,
+                snapshot_suffix=None,
+                version_str=None,
+            )
 
     def create_major(self):
         new_version_list = self.version_list.copy()
         if self.is_snapshot() and new_version_list[2] == 0 and new_version_list[1] == 0:
-            return Version(new_version_list, snapshot_suffix=None, version_str=None)
+            return Version(
+                new_version_list,
+                self.default_snapshot_suffix,
+                snapshot_suffix=None,
+                version_str=None,
+            )
         else:
             new_version_list[2] = 0
             new_version_list[1] = 0
             new_version_list[0] += 1
-            return Version(new_version_list, snapshot_suffix=None, version_str=None)
+            return Version(
+                new_version_list,
+                self.default_snapshot_suffix,
+                snapshot_suffix=None,
+                version_str=None,
+            )
diff --git a/src/test/python/domain/helper.py b/src/test/python/domain/helper.py
index cf58a0f..05161d0 100644
--- a/src/test/python/domain/helper.py
+++ b/src/test/python/domain/helper.py
@@ -66,7 +66,7 @@ def devops_config(overrides: dict) -> dict:
 
 
 def build_devops(
-    overrides: dict, version: Version = Version.from_str("1.0.0-SNAPSHOT")
+    overrides: dict, version: Version = Version.from_str("1.0.0-SNAPSHOT", "SNAPSHOT")
 ) -> Devops:
     return DevopsFactory().build_devops(devops_config(overrides), version=version)
 
diff --git a/src/test/python/domain/test_build_file.py b/src/test/python/domain/test_build_file.py
index 001d901..fbd086a 100644
--- a/src/test/python/domain/test_build_file.py
+++ b/src/test/python/domain/test_build_file.py
@@ -45,7 +45,7 @@ def test_sould_parse_and_set_js():
 }
 """,
     )
-    assert sut.get_version() == Version.from_str("1.1.5-SNAPSHOT")
+    assert sut.get_version() == Version.from_str("1.1.5-SNAPSHOT", "SNAPSHOT")
 
     sut = BuildFile(
         Path("./package.json"),
@@ -67,7 +67,7 @@ def test_sould_parse_and_set_js():
 }
 """,
     )
-    sut.set_version(Version.from_str("1.1.5-SNAPSHOT").create_major())
+    sut.set_version(Version.from_str("1.1.5-SNAPSHOT", "SNAPSHOT").create_major())
     assert (
         """{
     "name": "c4k-jira",
@@ -85,7 +85,7 @@ version = "1.1.5-SNAPSHOT"
 
 """,
     )
-    assert sut.get_version() == Version.from_str("1.1.5-SNAPSHOT")
+    assert sut.get_version() == Version.from_str("1.1.5-SNAPSHOT", "SNAPSHOT")
 
     sut = BuildFile(
         Path("./build.gradle"),
@@ -93,7 +93,7 @@ version = "1.1.5-SNAPSHOT"
 version = "1.1.5-SNAPSHOT"
 """,
     )
-    sut.set_version(Version.from_str("1.1.5-SNAPSHOT").create_major())
+    sut.set_version(Version.from_str("1.1.5-SNAPSHOT", "SNAPSHOT").create_major())
     assert '\nversion = "2.0.0"\n' == sut.content
 
 
@@ -109,7 +109,7 @@ version = "1.1.5-dev12"
 summary = "tools to support builds combining gopass, terraform, dda-pallet, aws & hetzner-cloud"
 """,
     )
-    assert sut.get_version() == Version.from_str("1.1.5-dev12")
+    assert sut.get_version() == Version.from_str("1.1.5-dev12", "dev")
 
     sut = BuildFile(
         Path("./build.py"),
@@ -117,7 +117,7 @@ summary = "tools to support builds combining gopass, terraform, dda-pallet, aws
 version = "1.1.5-dev12"
 """,
     )
-    sut.set_version(Version.from_str("1.1.5-dev12").create_major())
+    sut.set_version(Version.from_str("1.1.5-dev12", "dev").create_major())
     assert '\nversion = "2.0.0"\n' == sut.content
 
     sut = BuildFile(
@@ -131,7 +131,7 @@ version = "1.1.5-SNAPSHOT"
 summary = "tools to support builds combining gopass, terraform, dda-pallet, aws & hetzner-cloud"
 """,
     )
-    assert sut.get_version() == Version.from_str("1.1.5-SNAPSHOT")
+    assert sut.get_version() == Version.from_str("1.1.5-SNAPSHOT", "SNAPSHOT")
 
     sut = BuildFile(
         Path("./build.py"),
@@ -139,7 +139,7 @@ summary = "tools to support builds combining gopass, terraform, dda-pallet, aws
 version = "1.1.5-SNAPSHOT"
 """,
     )
-    sut.set_version(Version.from_str("1.1.5-SNAPSHOT").create_major())
+    sut.set_version(Version.from_str("1.1.5-SNAPSHOT", "SNAPSHOT").create_major())
     assert '\nversion = "2.0.0"\n' == sut.content
 
 
@@ -153,7 +153,7 @@ def test_sould_parse_and_set_version_for_clj():
 )
 """,
     )
-    assert sut.get_version() == Version.from_str("1.1.5-SNAPSHOT")
+    assert sut.get_version() == Version.from_str("1.1.5-SNAPSHOT", "SNAPSHOT")
 
     sut = BuildFile(
         Path("./project.clj"),
@@ -163,7 +163,7 @@ def test_sould_parse_and_set_version_for_clj():
 )
 """,
     )
-    sut.set_version(Version.from_str("1.1.5-SNAPSHOT").create_major())
+    sut.set_version(Version.from_str("1.1.5-SNAPSHOT", "SNAPSHOT").create_major())
     assert (
         '\n(defproject org.domaindrivenarchitecture/c4k-jira "2.0.0"\n  :description "jira c4k-installation package"\n)\n'
         == sut.content
@@ -177,7 +177,7 @@ def test_sould_parse_and_set_version_for_clj():
 )
     """,
     )
-    sut.set_version(Version.from_str("1.1.5-SNAPSHOT").create_major())
+    sut.set_version(Version.from_str("1.1.5-SNAPSHOT", "SNAPSHOT").create_major())
     assert (
         '\n(defproject org.domaindrivenarchitecture/c4k-jira "2.0.0"\n:dependencies [[org.clojure/clojure "1.11.0"]]\n)\n    '
         == sut.content
diff --git a/src/test/python/domain/test_devops_factory.py b/src/test/python/domain/test_devops_factory.py
index 5559102..ceb12a1 100644
--- a/src/test/python/domain/test_devops_factory.py
+++ b/src/test/python/domain/test_devops_factory.py
@@ -45,7 +45,7 @@ def test_devops_factory():
             "c4k_grafana_cloud_user": "user",
             "c4k_grafana_cloud_password": "password",
         },
-        Version.from_str("1.0.0"),
+        Version.from_str("1.0.0", "SNAPSHOT"),
     )
     assert sut is not None
     assert sut.specialized_builds[BuildType.C4K] is not None
@@ -62,7 +62,7 @@ def test_devops_factory():
             "release_current_branch": "my_feature",
             "release_config_file": "project.clj",
         },
-        Version.from_str("1.0.0"),
+        Version.from_str("1.0.0", "SNAPSHOT"),
     )
     assert sut is not None
     assert sut.mixins[MixinType.RELEASE] is not None
diff --git a/src/test/python/domain/test_init_service.py b/src/test/python/domain/test_init_service.py
index 531e485..1e9e9ba 100644
--- a/src/test/python/domain/test_init_service.py
+++ b/src/test/python/domain/test_init_service.py
@@ -27,7 +27,7 @@ def test_should_load_build_file():
         GitApiMock(),
     )
     assert (
-        Version.from_str("1.1.5-SNAPSHOT")
+        Version.from_str("1.1.5-SNAPSHOT", "SNAPSHOT")
         == sut.initialize(devops_config({})).mixins[MixinType.RELEASE].version
     )
 
@@ -42,7 +42,7 @@ def test_should_load_build_file():
         GitApiMock(),
     )
     assert (
-        Version.from_str("4.0.0-dev73")
+        Version.from_str("4.0.0-dev73", "dev")
         == sut.initialize(devops_config({})).mixins[MixinType.RELEASE].version
     )
 
diff --git a/src/test/python/domain/test_release.py b/src/test/python/domain/test_release.py
index 7333236..c23bc39 100644
--- a/src/test/python/domain/test_release.py
+++ b/src/test/python/domain/test_release.py
@@ -22,7 +22,7 @@ def test_sould_validate_release():
                 "release_current_branch": "main",
             }
         ),
-        Version.from_str("1.3.1-SNAPSHOT"),
+        Version.from_str("1.3.1-SNAPSHOT", "SNAPSHOT"),
     )
     assert sut.is_valid()
 
@@ -33,7 +33,7 @@ def test_sould_validate_release():
                 "release_current_branch": "some-feature-branch",
             }
         ),
-        Version.from_str("1.3.1-SNAPSHOT"),
+        Version.from_str("1.3.1-SNAPSHOT", "SNAPSHOT"),
     )
     assert not sut.is_valid()
 
@@ -43,7 +43,7 @@ def test_sould_validate_release():
                 "release_primary_build_file": 1,
             }
         ),
-        Version.from_str("1.3.1-SNAPSHOT"),
+        Version.from_str("1.3.1-SNAPSHOT", "SNAPSHOT"),
     )
     assert not sut.is_valid()
 
@@ -58,6 +58,6 @@ def test_sould_calculate_build_files():
                 "release_secondary_build_files": ["package.json"],
             }
         ),
-        Version.from_str("1.3.1-SNAPSHOT"),
+        Version.from_str("1.3.1-SNAPSHOT", "SNAPSHOT"),
     )
     assert ["project.clj", "package.json"] == sut.build_files()
diff --git a/src/test/python/domain/test_version.py b/src/test/python/domain/test_version.py
index d601e67..ab9f6ae 100644
--- a/src/test/python/domain/test_version.py
+++ b/src/test/python/domain/test_version.py
@@ -9,106 +9,110 @@ from .helper import build_devops, devops_config
 
 
 def test_version_creation():
-    sut = Version.from_str("1.2.3")
+    sut = Version.from_str("1.2.3", "SNAPSHOT")
     assert sut.to_string() == "1.2.3"
     assert sut.version_list == [1, 2, 3]
     assert sut.is_snapshot() == False
 
-    sut = Version.from_str("1.2.3-SNAPSHOT")
+    sut = Version.from_str("1.2.3-SNAPSHOT", "SNAPSHOT")
     assert sut.to_string() == "1.2.3-SNAPSHOT"
     assert sut.version_list == [1, 2, 3]
     assert sut.is_snapshot() == True
 
 
 def test_should_validate_version_list():
-    sut = Version(None)
+    sut = Version(None, "SNAPSHOT")
     assert not sut.is_valid()
 
-    sut = Version([])
+    sut = Version([], "SNAPSHOT")
     assert not sut.is_valid()
 
-    sut = Version([1, 2])
+    sut = Version([1, 2], "SNAPSHOT")
     assert not sut.is_valid()
 
-    sut = Version([1, 2, 3])
+    sut = Version([1, 2, 3], "SNAPSHOT")
     assert sut.is_valid()
 
 
 def test_should_validate_parsing():
-    sut = Version.from_str("1.2")
+    sut = Version.from_str("1.2", "SNAPSHOT")
     assert not sut.is_valid()
 
-    sut = Version.from_str("1.2.3")
+    sut = Version.from_str("1.2.3", "SNAPSHOT")
     sut.version_list = [2, 2, 2]
     assert not sut.is_valid()
 
-    sut = Version.from_str("1.2.3")
+    sut = Version.from_str("1.2.3", "SNAPSHOT")
     assert sut.is_valid()
 
-    sut = Version.from_str("1.2.3-SNAPSHOT")
+    sut = Version.from_str("1.2.3-SNAPSHOT", "SNAPSHOT")
     assert sut.is_valid()
 
-    sut = Version.from_str("1.2.3-dev")
+    sut = Version.from_str("1.2.3-dev", "dev")
     assert sut.is_valid()
 
 
 def test_should_create_patch():
-    version = Version.from_str("1.2.3-SNAPSHOT")
+    version = Version.from_str("1.2.3-SNAPSHOT", "SNAPSHOT")
     sut = version.create_patch()
     assert sut.to_string() == "1.2.3"
     assert version.to_string() == "1.2.3-SNAPSHOT"
 
-    version = Version.from_str("1.2.3")
+    version = Version.from_str("1.2.3", "SNAPSHOT")
     sut = version.create_patch()
     assert sut.to_string() == "1.2.4"
     assert version.to_string() == "1.2.3"
 
 
 def test_should_create_minor():
-    version = Version.from_str("1.2.3-SNAPSHOT")
+    version = Version.from_str("1.2.3-SNAPSHOT", "SNAPSHOT")
     sut = version.create_minor()
     assert sut.to_string() == "1.3.0"
 
-    version = Version.from_str("1.2.3")
+    version = Version.from_str("1.2.3", "SNAPSHOT")
     sut = version.create_minor()
     assert sut.to_string() == "1.3.0"
 
-    version = Version.from_str("1.3.0-SNAPSHOT")
+    version = Version.from_str("1.3.0-SNAPSHOT", "SNAPSHOT")
     sut = version.create_minor()
     assert sut.to_string() == "1.3.0"
 
-    version = Version.from_str("1.3.0")
+    version = Version.from_str("1.3.0", "SNAPSHOT")
     sut = version.create_minor()
     assert sut.to_string() == "1.4.0"
 
 
 def test_should_create_major():
-    version = Version.from_str("1.2.3-SNAPSHOT")
+    version = Version.from_str("1.2.3-SNAPSHOT", "SNAPSHOT")
     sut = version.create_major()
     assert sut.to_string() == "2.0.0"
 
-    version = Version.from_str("1.2.3")
+    version = Version.from_str("1.2.3", "SNAPSHOT")
     sut = version.create_major()
     assert sut.to_string() == "2.0.0"
 
-    version = Version.from_str("1.0.0-SNAPSHOT")
+    version = Version.from_str("1.0.0-SNAPSHOT", "SNAPSHOT")
     sut = version.create_major()
     assert sut.to_string() == "1.0.0"
 
-    version = Version.from_str("1.0.0")
+    version = Version.from_str("1.0.0", "SNAPSHOT")
     sut = version.create_major()
     assert sut.to_string() == "2.0.0"
 
 
 def test_should_create_bump():
-    version = Version.from_str("1.2.3-SNAPSHOT")
+    version = Version.from_str("1.2.3-SNAPSHOT", "SNAPSHOT")
     sut = version.create_bump()
     assert sut.to_string() == "1.2.3-SNAPSHOT"
 
-    version = Version.from_str("1.2.3")
-    sut = version.create_bump("SNAPSHOT")
+    version = Version.from_str("1.2.3", "SNAPSHOT")
+    sut = version.create_bump()
     assert sut.to_string() == "1.2.4-SNAPSHOT"
 
-    version = Version.from_str("1.0.0")
-    sut = version.create_bump("SNAPSHOT")
+    version = Version.from_str("1.0.0", "SNAPSHOT")
+    sut = version.create_bump()
     assert sut.to_string() == "1.0.1-SNAPSHOT"
+
+    version = Version.from_str("1.0.0", "dev")
+    sut = version.create_bump()
+    assert sut.to_string() == "1.0.1-dev"