diff --git a/public/images/events/september-update-pt_BR.png b/public/images/events/september-update-pt-BR.png
similarity index 100%
rename from public/images/events/september-update-pt_BR.png
rename to public/images/events/september-update-pt-BR.png
diff --git a/public/images/events/september-update-zh_CN.png b/public/images/events/september-update-zh-CN.png
similarity index 100%
rename from public/images/events/september-update-zh_CN.png
rename to public/images/events/september-update-zh-CN.png
diff --git a/src/loading-scene.ts b/src/loading-scene.ts
index e4a73414cd1..f5b44f03458 100644
--- a/src/loading-scene.ts
+++ b/src/loading-scene.ts
@@ -244,7 +244,7 @@ export class LoadingScene extends SceneBase {
     } else {
       this.loadAtlas("types", "");
     }
-    const availableLangs = ["en", "de", "it", "fr", "ja", "ko", "es", "pt_BR", "zh_CN"];
+    const availableLangs = ["en", "de", "it", "fr", "ja", "ko", "es", "pt-BR", "zh-CN"];
     if (lang && availableLangs.includes(lang)) {
       this.loadImage("september-update-"+lang, "events");
     } else {
diff --git a/src/timed-event-manager.ts b/src/timed-event-manager.ts
index abdb2db232a..874bf6a8b46 100644
--- a/src/timed-event-manager.ts
+++ b/src/timed-event-manager.ts
@@ -33,7 +33,7 @@ const timedEvents: TimedEvent[] = [
     xPosition: 19,
     yPosition: 115,
     scale: 0.30,
-    availableLangs: ["en", "de", "it", "fr", "ja", "ko", "es", "pt_BR", "zh_CN"]
+    availableLangs: ["en", "de", "it", "fr", "ja", "ko", "es", "pt-BR", "zh-CN"]
   }
 ];