diff --git a/src/lib/components/layout/Sidebar/ChatItem.svelte b/src/lib/components/layout/Sidebar/ChatItem.svelte
index 5830be5ad3..ae78ef905e 100644
--- a/src/lib/components/layout/Sidebar/ChatItem.svelte
+++ b/src/lib/components/layout/Sidebar/ChatItem.svelte
@@ -77,7 +77,7 @@
 
 	export let ownerName: string | null = null;
 	export let ownerUserId: string | null = null;
-	export let onReadStateChange = (data) => {};
+	export let onReadStateChange: (data: Record<string, unknown>) => void = () => {};
 
 	export let onDragEnd = () => {};
 
diff --git a/src/lib/components/layout/Sidebar/Folders.svelte b/src/lib/components/layout/Sidebar/Folders.svelte
index 694a0e8955..e553843a7f 100644
--- a/src/lib/components/layout/Sidebar/Folders.svelte
+++ b/src/lib/components/layout/Sidebar/Folders.svelte
@@ -10,8 +10,8 @@
 	export let folders = {};
 	export let shiftKey = false;
 
-	export let onDelete = (folderId) => {};
-	export let onFolderUnreadCounts = (counts) => {};
+	export let onDelete = () => {};
+	export let onFolderUnreadCounts = () => {};
 
 	let ownedList = [];
 	let sharedList = [];
diff --git a/src/lib/components/layout/Sidebar/RecursiveFolder.svelte b/src/lib/components/layout/Sidebar/RecursiveFolder.svelte
index 4d5255ab99..50bb8a7f4a 100644
--- a/src/lib/components/layout/Sidebar/RecursiveFolder.svelte
+++ b/src/lib/components/layout/Sidebar/RecursiveFolder.svelte
@@ -59,9 +59,9 @@
 
 	export let parentDragged = false;
 
-	export let onDelete = (e) => {};
-	export let onItemMove = (e) => {};
-	export let onFolderUnreadCounts = (counts) => {};
+	export let onDelete = () => {};
+	export let onItemMove = () => {};
+	export let onFolderUnreadCounts = () => {};
 
 	let folderElement;