diff --git a/sqlite/set_config.py b/sqlite/set_config.py
index 35e04cc..6751220 100644
--- a/sqlite/set_config.py
+++ b/sqlite/set_config.py
@@ -107,6 +107,18 @@ for connected, port, name, coefficient in envea_sondes:
         print(f"Envea sonde '{name}' already exists, skipping")
 
 
+# Database migrations (add columns to existing tables)
+migrations = [
+    ("data_NPM", "npm_status", "INTEGER DEFAULT 0"),
+]
+
+for table, column, col_type in migrations:
+    try:
+        cursor.execute(f"ALTER TABLE {table} ADD COLUMN {column} {col_type}")
+        print(f"Migration: added column '{column}' to {table}")
+    except:
+        pass  # Column already exists
+
 # Commit and close the connection
 conn.commit()
 conn.close()