diff --git a/demo_mover/README.md b/demo_mover/README.md
index 4c07ae07..738dcd81 100644
--- a/demo_mover/README.md
+++ b/demo_mover/README.md
@@ -8,6 +8,4 @@
 
 ##config file: server specifics
 
-##python3 demo_mover.py config.json
-
 ##should be run with a .service triggered through a systemctl timer
diff --git a/demo_mover/demo_mover.py b/demo_mover/demo_mover.py
index 9e43d22f..48c44349 100644
--- a/demo_mover/demo_mover.py
+++ b/demo_mover/demo_mover.py
@@ -21,6 +21,8 @@ def create_remote(config, settings):
 
 def distribute_files(path_list, dest):
     for pathfile in path_list:
+        if not str(pathfile).endswith('.dem'):
+            continue
         log_msg = "uploading demo: " + str(pathfile)
         logging.info(log_msg)
         if not dest.put(pathfile, dest.path):
diff --git a/demo_mover/remote_local_dir.py b/demo_mover/remote_local_dir.py
index c674125d..91b532e1 100644
--- a/demo_mover/remote_local_dir.py
+++ b/demo_mover/remote_local_dir.py
@@ -13,5 +13,6 @@ class local_dir_remote:
 
     def delete_local(self, pathfile):
         with contextlib.suppress(FileNotFoundError):
-            os.remove(pathfile)
-            print('removed demo: ', pathfile)
+            if str(pathfile).endswith('.dem'):
+                os.remove(pathfile)
+                print('removed demo: ', pathfile)
diff --git a/demo_mover/remote_sftp.py b/demo_mover/remote_sftp.py
index cc59401c..9b475322 100644
--- a/demo_mover/remote_sftp.py
+++ b/demo_mover/remote_sftp.py
@@ -109,6 +109,8 @@ class sftp_remote:
         self.connect()
         for pathfile in source_files:
             pathfile = str(pathfile)
+            if not pathfile.endswith('.dem'):
+                continue
             filename = pathfile.split("/")[-1]
             pathfile = self.path + filename
             utime = self.sftp.stat(pathfile).st_mtime