diff --git a/build.py b/build.py
index c7591f0..8c7f489 100644
--- a/build.py
+++ b/build.py
@@ -33,7 +33,7 @@ default_task = "dev"
 name = "ddadevops"
 MODULE = "not-used"
 PROJECT_ROOT_PATH = "."
-version = "4.0.4-SNAPSHOT"
+version = "4.0.6-dev"
 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/src/main/python/ddadevops/domain/build_file.py b/src/main/python/ddadevops/domain/build_file.py
index b154b2a..c4056a0 100644
--- a/src/main/python/ddadevops/domain/build_file.py
+++ b/src/main/python/ddadevops/domain/build_file.py
@@ -61,7 +61,8 @@ class BuildFile(Validateable):
                     version_line = re.search("\nversion = .*\n", self.content)
                     version_line_group = version_line.group()
                     version_string = re.search(
-                        "[0-9]*\\.[0-9]*\\.[0-9]*(-SNAPSHOT)?(-dev)?[0-9]*", version_line_group
+                        "[0-9]*\\.[0-9]*\\.[0-9]*(-SNAPSHOT)?(-dev)?[0-9]*",
+                        version_line_group,
                     )
                     version_str = version_string.group()
                 case BuildFileType.JAVA_CLOJURE:
diff --git a/src/test/python/domain/test_build_file.py b/src/test/python/domain/test_build_file.py
index 308ac90..001d901 100644
--- a/src/test/python/domain/test_build_file.py
+++ b/src/test/python/domain/test_build_file.py
@@ -68,10 +68,13 @@ def test_sould_parse_and_set_js():
 """,
     )
     sut.set_version(Version.from_str("1.1.5-SNAPSHOT").create_major())
-    assert """{
+    assert (
+        """{
     "name": "c4k-jira",
     "version": "2.0.0"
-}""" == sut.content
+}"""
+        == sut.content
+    )
 
 
 def test_sould_parse_and_set_version_for_gradle():
@@ -93,6 +96,7 @@ version = "1.1.5-SNAPSHOT"
     sut.set_version(Version.from_str("1.1.5-SNAPSHOT").create_major())
     assert '\nversion = "2.0.0"\n' == sut.content
 
+
 def test_sould_parse_and_set_version_for_py():
     sut = BuildFile(
         Path("./build.py"),
@@ -138,6 +142,7 @@ version = "1.1.5-SNAPSHOT"
     sut.set_version(Version.from_str("1.1.5-SNAPSHOT").create_major())
     assert '\nversion = "2.0.0"\n' == sut.content
 
+
 def test_sould_parse_and_set_version_for_clj():
     sut = BuildFile(
         Path("./project.clj"),
@@ -159,15 +164,21 @@ def test_sould_parse_and_set_version_for_clj():
 """,
     )
     sut.set_version(Version.from_str("1.1.5-SNAPSHOT").create_major())
-    assert '\n(defproject org.domaindrivenarchitecture/c4k-jira "2.0.0"\n  :description "jira c4k-installation package"\n)\n' == sut.content
+    assert (
+        '\n(defproject org.domaindrivenarchitecture/c4k-jira "2.0.0"\n  :description "jira c4k-installation package"\n)\n'
+        == sut.content
+    )
 
     sut = BuildFile(
-            Path("./project.clj"),
-            """
+        Path("./project.clj"),
+        """
 (defproject org.domaindrivenarchitecture/c4k-jira "1.1.5-SNAPSHOT"
 :dependencies [[org.clojure/clojure "1.11.0"]]
 )
     """,
-        )
+    )
     sut.set_version(Version.from_str("1.1.5-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
+    assert (
+        '\n(defproject org.domaindrivenarchitecture/c4k-jira "2.0.0"\n:dependencies [[org.clojure/clojure "1.11.0"]]\n)\n    '
+        == sut.content
+    )