diff --git a/android_class_shadowing_scanner/analysis.py b/android_class_shadowing_scanner/analysis.py
index d623d28..79ade62 100644
--- a/android_class_shadowing_scanner/analysis.py
+++ b/android_class_shadowing_scanner/analysis.py
@@ -182,10 +182,12 @@ def scan_classes(
         data["ref_platform_non_sdk_34_classes"] = list(ref_platform_non_sdk_34_classes)
     if sdk34_classes_file is not None:
         with sdk34_classes_file.open("w") as file:
-            file.writelines(sorted(sdk_34_classes))
+            for l in sorted(sdk_34_classes):
+                file.write(f"{l}\n")
     if hidden_file is not None:
         with hidden_file.open("w") as file:
-            file.writelines(sorted(ref_platform_non_sdk_34_classes))
+            for l in sorted(ref_platform_non_sdk_34_classes):
+                file.write(f"{l}\n")
     return entry