diff --git a/demo-module/src/main/java/com/highcapable/yukihookapi/demo_module/ui/MainActivity.kt b/demo-module/src/main/java/com/highcapable/yukihookapi/demo_module/ui/MainActivity.kt
index 4be425c6..a8b7f80c 100644
--- a/demo-module/src/main/java/com/highcapable/yukihookapi/demo_module/ui/MainActivity.kt
+++ b/demo-module/src/main/java/com/highcapable/yukihookapi/demo_module/ui/MainActivity.kt
@@ -82,7 +82,7 @@ class MainActivity : ModuleAppCompatActivity() {
                 moduleDemoButton.setOnClickListener { _ ->
                     moduleEnvironment {
                         if (it.text.toString().isNotEmpty()) {
-                            modulePrefs.put(DataConst.TEST_KV_DATA, it.text.toString())
+                            modulePrefs.edit { put(DataConst.TEST_KV_DATA, it.text.toString()) }
                             Toast.makeText(applicationContext, "Saved", Toast.LENGTH_SHORT).show()
                         } else Toast.makeText(applicationContext, "Please enter the text", Toast.LENGTH_SHORT).show()
                     }