diff --git a/domain.py b/domain.py
index fe0805e..a95e847 100644
--- a/domain.py
+++ b/domain.py
@@ -64,7 +64,7 @@ class Release():
         return self.version.create_release_version(self.release_type)
 
     def bump_version(self):
-        return self.version.create_bump_version()
+        return self.release_version().create_bump_version()
 
     def validate(self, main_branch):
         result = []