diff --git a/modem/server.py b/modem/server.py
index 1abda73a..12fdfa80 100644
--- a/modem/server.py
+++ b/modem/server.py
@@ -96,6 +96,10 @@ def index():
 @app.route('/config', methods=['GET', 'POST'])
 def config():
     if request.method in ['POST']:
+        # check if config already exists
+        if app.config_manager.read() == request.json:
+            return api_response(request.json)
+
         set_config = app.config_manager.write(request.json)
         if not set_config:
             response = api_response(None, 'error writing config')