diff --git a/Source/UEBlueprintMCPEditor/Private/SMCPWizard.cpp b/Source/UEBlueprintMCPEditor/Private/SMCPWizard.cpp
index 9d8513e..b948a26 100644
--- a/Source/UEBlueprintMCPEditor/Private/SMCPWizard.cpp
+++ b/Source/UEBlueprintMCPEditor/Private/SMCPWizard.cpp
@@ -273,7 +273,8 @@ FReply SMCPWizard::OnSaveElevenLabsKey()
     FString Out;
     TSharedRef<TJsonWriter<TCHAR, TPrettyJsonPrintPolicy<TCHAR>>> Writer = TJsonWriterFactory<TCHAR, TPrettyJsonPrintPolicy<TCHAR>>::Create(&Out);
     const bool bSer = FJsonSerializer::Serialize(Root.ToSharedRef(), Writer);
-    const bool bOk = bSer && FFileHelper::SaveStringToFile(Out, *File);
+    // UTF-8 (no BOM) so Node's JSON.parse can read it back.
+    const bool bOk = bSer && FFileHelper::SaveStringToFile(Out, *File, FFileHelper::EEncodingOptions::ForceUTF8WithoutBOM);
     Notify(bOk
         ? FText::Format(LOCTEXT("ElevenSaved", "Saved to {0}"), FText::FromString(File))
         : LOCTEXT("ElevenSaveFail", "Could not write integrations.json"), bOk);
@@ -430,7 +431,7 @@ bool SMCPWizard::UpsertEnvVar(const FString& FilePath, const FString& Key, const
         Lines.Pop();
     }
     const FString Out = FString::Join(Lines, TEXT("\n")) + TEXT("\n");
-    return FFileHelper::SaveStringToFile(Out, *FilePath);
+    return FFileHelper::SaveStringToFile(Out, *FilePath, FFileHelper::EEncodingOptions::ForceUTF8WithoutBOM);
 }
 
 #undef LOCTEXT_NAMESPACE