diff --git a/frontend/src/components/drawer/LetterItem.tsx b/frontend/src/components/drawer/LetterItem.tsx
index 0c1cd58..418b521 100644
--- a/frontend/src/components/drawer/LetterItem.tsx
+++ b/frontend/src/components/drawer/LetterItem.tsx
@@ -2,6 +2,15 @@ import { LockIcon, LockKeyOpenIcon } from "@phosphor-icons/react";
 import { useNavigate } from "react-router-dom";
 import { PATHS } from "../../config/routes";
 
+interface LetterItemProps {
+  preview: string;
+  timestamp: string;
+  id: string;
+  status: "DRAFT" | "SEALED" | "BURNED";
+  unlock_at?: string;
+  isLocked?: boolean;
+}
+
 export function LetterItem({
   preview,
   timestamp,
@@ -9,14 +18,7 @@ export function LetterItem({
   status,
   unlock_at,
   isLocked = false,
-}: {
-  preview: string;
-  timestamp: string;
-  id: string;
-  status: "DRAFT" | "SEALED" | "BURNED";
-  unlock_at?: string;
-  isLocked?: boolean;
-}) {
+}: LetterItemProps) {
   const navigate = useNavigate();
   function handleNavigate(): void {
     if (isLocked) return;
diff --git a/frontend/src/components/reader/BurnModal.tsx b/frontend/src/components/reader/BurnModal.tsx
index 4fdb372..e5e5154 100644
--- a/frontend/src/components/reader/BurnModal.tsx
+++ b/frontend/src/components/reader/BurnModal.tsx
@@ -1,12 +1,19 @@
 import { CampfireIcon, FlameIcon, XCircleIcon } from "@phosphor-icons/react";
 import { useEffect, useState } from "react";
 
+interface BurnModalProps {
+  burnLetter: () => void;
+  isBurning: boolean;
+  setShowBurnModal: (show: boolean) => void;
+  setRevealState: (state: "sealed" | "revealed" | "burning" | "burned") => void;
+}
+
 export function BurnModal({
   burnLetter,
   isBurning,
   setShowBurnModal,
   setRevealState,
-}) {
+}: BurnModalProps) {
   const [flameOn, setFlameOn] = useState(0);
   const [rotate, setRotate] = useState(0);
   const [burnClicked, setBurnClicked] = useState(false);
diff --git a/frontend/src/components/reader/ShareModal.tsx b/frontend/src/components/reader/ShareModal.tsx
index 20bfc2e..4c094b2 100644
--- a/frontend/src/components/reader/ShareModal.tsx
+++ b/frontend/src/components/reader/ShareModal.tsx
@@ -4,7 +4,12 @@ import {
   XCircleIcon,
 } from "@phosphor-icons/react";
 
-export function ShareModal({ shareLink, setShareLink }) {
+interface ShareModalProps {
+  shareLink: string | null;
+  setShareLink: (link: string | null) => void;
+}
+
+export function ShareModal({ shareLink, setShareLink }: ShareModalProps) {
   const copyToClipboard = async () => {
     if (!shareLink) return;
     await navigator.clipboard.writeText(shareLink);
diff --git a/frontend/src/pages/Reader.tsx b/frontend/src/pages/Reader.tsx
index ef09c98..537334b 100644
--- a/frontend/src/pages/Reader.tsx
+++ b/frontend/src/pages/Reader.tsx
@@ -44,7 +44,7 @@ export default function Reader() {
 
   const [isDecrypting, setIsDecrypting] = useState(true);
   const [revealState, setRevealState] = useState<
-    "sealed" | "revealed" | "burned"
+    "sealed" | "revealed" | "burned" | "burning"
   >("sealed");
   const [error, setError] = useState<{
     message: string;