diff --git a/Content.Server/GameTicking/GameTicker.LobbyBackground.cs b/Content.Server/GameTicking/GameTicker.LobbyBackground.cs
index 7f2ccfe235..2090e3e31f 100644
--- a/Content.Server/GameTicking/GameTicker.LobbyBackground.cs
+++ b/Content.Server/GameTicking/GameTicker.LobbyBackground.cs
@@ -13,7 +13,7 @@ public sealed partial class GameTicker
     [ViewVariables]
     private List<ResPath>? _lobbyBackgrounds;
 
-    private static readonly string[] WhitelistedBackgroundExtensions = new string[] {"png", "jpg", "jpeg"};
+    private static readonly string[] WhitelistedBackgroundExtensions = new string[] {"png", "jpg", "jpeg", "webp"};
 
     private void InitializeLobbyBackground()
     {
diff --git a/Resources/Textures/LobbyScreens/PutLobbyScreensHere.txt b/Resources/Textures/LobbyScreens/PutLobbyScreensHere.txt
index 52cb3f1dc9..7d7777fa10 100644
--- a/Resources/Textures/LobbyScreens/PutLobbyScreensHere.txt
+++ b/Resources/Textures/LobbyScreens/PutLobbyScreensHere.txt
@@ -1,2 +1,3 @@
 Note:
-Only png and jpgs files are supported, and you need a prototype in Resources/Prototypes/lobbyscreens.yml
+PNG, JPEG and WebP is supported. Please prefer a lossy WebP compression since lobby art is big.
+You also need to put a prototype in Resources/Prototypes/lobbyscreens.yml