diff --git a/app.json b/app.json
index ce77fcc..b96f697 100644
--- a/app.json
+++ b/app.json
@@ -22,6 +22,16 @@
             "description": "What method to use for the Inbox, sequence or parallel",
             "value": "parallel",
             "required": false
+        },
+        "TODODIST_PARALLEL_SUFFIX": {
+            "description": "What sequence of characters to use to identify parallel processed projects",
+            "value": "=",
+            "required": false
+        },
+        "TODODIST_SERIAL_SUFFIX": {
+            "description": "What sequence of characters to use to identify serial processed projects",
+            "value": "-",
+            "required": false
         }
     }
 }
\ No newline at end of file
diff --git a/nextaction.py b/nextaction.py
index e407382..69831d9 100755
--- a/nextaction.py
+++ b/nextaction.py
@@ -12,15 +12,17 @@ API_TOKEN = os.environ.get('TODOIST_API_KEY', None)
 NEXT_ACTION_LABEL = os.environ.get('TODOIST_NEXT_ACTION_LABEL', 'next_action')
 SYNC_DELAY = int(os.environ.get('TODOIST_SYNC_DELAY', '5'))
 INBOX_HANDLING = os.environ.get('TODOIST_INBOX_HANDLING', 'parallel')
-
+PARALLEL_SUFFIX = os.environ.get('TODOIST_PARALLEL_SUFFIX', '=')
+SERIAL_SUFFIX = os.environ.get('TODOIST_SERIAL_SUFFIX', '-')
 
 def get_project_type(project):
+    """Identifies how a project should be handled"""
     name = project['name'].strip()
     if project['name'] == 'Inbox':
         return INBOX_HANDLING
-    elif name[-1] == '=':
+    elif name[-1] == PARALLEL_SUFFIX:
         return 'parallel'
-    elif name[-1] == '-':
+    elif name[-1] == SERIAL_SUFFIX:
         return 'serial'