diff --git a/cli/src/core/service_creator.py b/cli/src/core/service_creator.py
index b7c3b6a..cf1a4b4 100644
--- a/cli/src/core/service_creator.py
+++ b/cli/src/core/service_creator.py
@@ -169,7 +169,8 @@ class ServiceCreator:
             updated_content = re.sub(
                 pattern, f"\n{new_row}\n\\1", file_content, count=1, flags=re.MULTILINE
             )
-            return updated_content
+            with open(MASTER_IOC_SUBS_FILE, "w") as f:
+                f.write(updated_content)
         else:
             raise ValueError(
                 "Could not locate the closing structure format '}' inside the configuration."