diff --git a/README.md b/README.md
index 350463f1..c963cd7e 100644
--- a/README.md
+++ b/README.md
@@ -452,6 +452,17 @@ POST_OFFICE = {
 }
 ```
 
+### Lock File Name
+The default lock file name is `post_office`, but this can be altered by setting `LOCK_FILE_NAME` in the configuration.
+
+```python
+# Put this in settings.py
+POST_OFFICE = {
+    ...
+    'LOCK_FILE_NAME': 'custom_lock_file',
+}
+```
+
 ### Override Recipients
 
 Defaults to `None`. This option is useful if you want to redirect all
diff --git a/post_office/lockfile.py b/post_office/lockfile.py
index ec95baee..1340785e 100644
--- a/post_office/lockfile.py
+++ b/post_office/lockfile.py
@@ -23,6 +23,8 @@
 import tempfile
 import time
 
+from post_office.settings import get_lock_file_name
+
 
 class FileLocked(Exception):
     pass
@@ -152,4 +154,4 @@ def __exit__(self, type, value, traceback):
         self.release()
 
 
-default_lockfile = os.path.join(tempfile.gettempdir(), 'post_office')
+default_lockfile = os.path.join(tempfile.gettempdir(), get_lock_file_name())
diff --git a/post_office/settings.py b/post_office/settings.py
index 387d31db..19aa7617 100644
--- a/post_office/settings.py
+++ b/post_office/settings.py
@@ -83,6 +83,10 @@ def get_celery_enabled():
     return get_config().get('CELERY_ENABLED', False)
 
 
+def get_lock_file_name():
+    return get_config().get('LOCK_FILE_NAME', 'post_office')
+
+
 def get_threads_per_process():
     return get_config().get('THREADS_PER_PROCESS', 5)