diff --git a/src/main/python/ddadevops/domain/build_file.py b/src/main/python/ddadevops/domain/build_file.py
index 018fba3..b154b2a 100644
--- a/src/main/python/ddadevops/domain/build_file.py
+++ b/src/main/python/ddadevops/domain/build_file.py
@@ -61,7 +61,7 @@ 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]*(-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:
@@ -97,7 +97,7 @@ class BuildFile(Validateable):
                     self.content = substitute
                 case BuildFileType.PYTHON:
                     substitute = re.sub(
-                        '\nversion = "[0-9]*\\.[0-9]*\\.[0-9]*(-dev)?[0-9]*"',
+                        '\nversion = "[0-9]*\\.[0-9]*\\.[0-9]*(-SNAPSHOT)?(-dev)?[0-9]*"',
                         f'\nversion = "{new_version.to_string()}"',
                         self.content,
                     )
diff --git a/src/test/python/domain/test_build_file.py b/src/test/python/domain/test_build_file.py
index b2ee837..308ac90 100644
--- a/src/test/python/domain/test_build_file.py
+++ b/src/test/python/domain/test_build_file.py
@@ -116,6 +116,27 @@ version = "1.1.5-dev12"
     sut.set_version(Version.from_str("1.1.5-dev12").create_major())
     assert '\nversion = "2.0.0"\n' == sut.content
 
+    sut = BuildFile(
+        Path("./build.py"),
+        """
+from pybuilder.core import init, use_plugin, Author
+use_plugin("python.core")
+
+name = "ddadevops"
+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")
+
+    sut = BuildFile(
+        Path("./build.py"),
+        """
+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(
diff --git a/src/test/python/domain/test_release.py b/src/test/python/domain/test_release.py
index 8690fd1..7333236 100644
--- a/src/test/python/domain/test_release.py
+++ b/src/test/python/domain/test_release.py
@@ -48,7 +48,7 @@ def test_sould_validate_release():
     assert not sut.is_valid()
 
 
-def test_sould_validate_release():
+def test_sould_calculate_build_files():
     sut = Release(
         devops_config(
             {