diff --git a/src/psm_parser.py b/src/psm_parser.py
index 10064d9..3031dba 100644
--- a/src/psm_parser.py
+++ b/src/psm_parser.py
@@ -172,7 +172,7 @@ def write_psm(name, items: list[str], filename: Path = Path("Connector.psm1")) -
     output += get_code.replace("!NAME!", name)
     output += convert_from.replace("!NAME!", name).replace("!MAPS!", define_maps(items))
     output += class_definition.replace("!NAME!", name).replace("!VARIABLES!", define_variables(items)).replace("!STRINGS!", define_strings(items))
-    with open(filename, "w") as f:
+    with open(filename, "a") as f:
         f.write(output)
     print(output)
     pass
\ No newline at end of file