diff --git a/src/state/settingsState.ts b/src/state/settingsState.ts
index 7253f8c6..37173469 100644
--- a/src/state/settingsState.ts
+++ b/src/state/settingsState.ts
@@ -95,7 +95,7 @@ export class SettingsState {
         // finally set requested language
         i18next.changeLanguage(lang)
 
-        this.lang = i18next.language
+        runInAction(() => (this.lang = i18next.language))
     }
 
     setDefaultTerminal(cmd: string): void {