diff --git a/src/git_flow/command/merge.py b/src/git_flow/command/merge.py
index 1599001..347df02 100644
--- a/src/git_flow/command/merge.py
+++ b/src/git_flow/command/merge.py
@@ -111,6 +111,7 @@ def create_pull_request(token: str, branch: str, target: str):
         target,
         title,
         changelog.generate_content(target, branch),
+        branch not in environments
     )
 
     success(message)
diff --git a/src/git_flow/remote/base.py b/src/git_flow/remote/base.py
index 24950fd..1fce6bf 100644
--- a/src/git_flow/remote/base.py
+++ b/src/git_flow/remote/base.py
@@ -56,6 +56,7 @@ class RemoteAPI(ABC):
         destination: str,
         title: str | None = None,
         description: str | None = None,
+        close_source_branch: bool = True
     ) -> str:
         pass
 
diff --git a/src/git_flow/remote/bitbucket.py b/src/git_flow/remote/bitbucket.py
index 8874c10..b329433 100644
--- a/src/git_flow/remote/bitbucket.py
+++ b/src/git_flow/remote/bitbucket.py
@@ -12,6 +12,7 @@ class BitbucketRemoteAPI(RemoteAPI):
         destination: str,
         title: str | None = None,
         description: str | None = None,
+        close_source_branch: bool = True
     ):
         request = requests.post(
             self.get_endpoint("/pullrequests"),
@@ -21,7 +22,7 @@ class BitbucketRemoteAPI(RemoteAPI):
                 "description": description,
                 "source": {"branch": {"name": source}},
                 "destination": {"branch": {"name": destination}},
-                "close_source_branch": True,
+                "close_source_branch": close_source_branch,
             },
         )
 
diff --git a/src/git_flow/remote/github.py b/src/git_flow/remote/github.py
index f46a5cc..84e00ef 100644
--- a/src/git_flow/remote/github.py
+++ b/src/git_flow/remote/github.py
@@ -11,6 +11,7 @@ class GithubRemoteAPI(RemoteAPI):
         destination: str,
         title: str | None = None,
         description: str | None = None,
+        close_source_branch: bool = True
     ) -> str:
         raise GitFlowError("not implemented yet!")