diff --git a/src/localisation/lang/en/locale.json b/src/localisation/lang/en/locale.json
index bbf005b..cee2106 100644
--- a/src/localisation/lang/en/locale.json
+++ b/src/localisation/lang/en/locale.json
@@ -70,5 +70,6 @@
     "color-scheme-light": "Light Mode",
     "color-scheme-dark": "Dark Mode",
     "artists": "Artists",
-    "privacy-policy": "Privacy Policy"
+    "privacy-policy": "Privacy Policy",
+    "sleep-timer": "Sleep timer"
 }
diff --git a/src/localisation/lang/nl/locale.json b/src/localisation/lang/nl/locale.json
index 485d822..f92c5a3 100644
--- a/src/localisation/lang/nl/locale.json
+++ b/src/localisation/lang/nl/locale.json
@@ -70,5 +70,6 @@
     "color-scheme-system": "Systeem",
     "color-scheme-light": "Lichte modus",
     "color-scheme-dark": "Donkere modus",
-    "privacy-policy": "Privacybeleid"
+    "privacy-policy": "Privacybeleid",
+    "sleep-timer": "Slaaptimer"
 }
diff --git a/src/localisation/types.ts b/src/localisation/types.ts
index 34e431d..8b9e4c4 100644
--- a/src/localisation/types.ts
+++ b/src/localisation/types.ts
@@ -69,3 +69,4 @@ export type LocaleKeys = 'play-next'
 | 'color-scheme-dark'
 | 'artists'
 | 'privacy-policy'
+| 'sleep-timer'
\ No newline at end of file