diff --git a/package.json b/package.json
index f1cea7e..d48a1ae 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
 	"devDependencies": {
 		"@babel/core": "^7.23.9",
 		"@babel/eslint-parser": "^7.23.10",
-		"@bakaso/fkclient": "^1.6.0",
+		"@bakaso/fkclient": "^1.6.1",
 		"@types/node": "^20.11.16",
 		"@vue/cli-plugin-babel": "^5.0.8",
 		"@vue/cli-plugin-eslint": "^5.0.8",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index c79783d..27bf880 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -12,8 +12,8 @@ devDependencies:
     specifier: ^7.23.10
     version: 7.23.10(@babel/core@7.23.9)(eslint@8.56.0)
   '@bakaso/fkclient':
-    specifier: ^1.6.0
-    version: 1.6.0
+    specifier: ^1.6.1
+    version: 1.6.1
   '@types/node':
     specifier: ^20.11.16
     version: 20.11.16
@@ -1485,8 +1485,8 @@ packages:
       to-fast-properties: 2.0.0
     dev: true
 
-  /@bakaso/fkclient@1.6.0:
-    resolution: {integrity: sha512-s2iu0u9OuB+rCGntxdRUJEATOl0q1E/Zj62uuoBHKH0xjvDshZ8OW9CAzp5rmNUQFzAVIWZoDqwMzqpLM3uJTg==}
+  /@bakaso/fkclient@1.6.1:
+    resolution: {integrity: sha512-E+OUnG+C5qv/aI8hzHJZ8VH3JZn2B00mNiRr+em6ZVaAaFx71/GHbVvBAby/qhz2QQ4qZiQZWCrHs0atYs/Tdw==}
     dev: true
 
   /@eslint-community/eslint-utils@4.4.0(eslint@8.56.0):
diff --git a/src/hooks/useAPIHandlers.js b/src/hooks/useAPIHandlers.ts
similarity index 81%
rename from src/hooks/useAPIHandlers.js
rename to src/hooks/useAPIHandlers.ts
index 5b87b0f..b37deab 100644
--- a/src/hooks/useAPIHandlers.js
+++ b/src/hooks/useAPIHandlers.ts
@@ -1,8 +1,10 @@
 import { getProps } from "@/utils"
 import { useStore } from "vuex"
 import { useToast } from "vue-toast-notification"
+import type { Post, Thread } from "@/store"
+import type FKClient from "@bakaso/fkclient"
 
-export default function useAPIHandlers(API) {
+export default function useAPIHandlers(API: FKClient) {
 	const store = useStore()
 	const toast = useToast()
 
@@ -23,12 +25,12 @@ export default function useAPIHandlers(API) {
 
 			store.commit("updateThreadList", {
 				...getProps(what, ["boardName", "count", "page"]),
-				payload: data.map(thread => thread.id),
+				payload: data.map((thread: Thread) => thread.id),
 			})
 
 			store.commit("updateThreads", data)
 
-			for (let thread of data) {
+			for (const thread of data) {
 				store.commit("updatePostList", {
 					threadId: thread.id,
 					payload: [thread.head.id],
@@ -64,13 +66,13 @@ export default function useAPIHandlers(API) {
 				// Feed
 				store.commit("updateFeed", {
 					...getProps(what, ["boardName", "count", "page"]),
-					payload: data.map(post => post.id),
+					payload: data.map((post: Post) => post.id),
 				})
 			} else {
 				// Thread
 				store.commit("updatePostList", {
 					...getProps(what, ["threadId", "count", "page"]),
-					payload: data.map(post => post.id),
+					payload: data.map((post: Post) => post.id),
 				})
 			}
 
@@ -88,6 +90,10 @@ export default function useAPIHandlers(API) {
 	API.addInMessageListener(
 		({ event, error }) => "created" === event && !error,
 		({ type, data }) => {
+			if (!type) {
+				return
+			}
+
 			const action = ({
 				board: "pushBoard",
 				post: "pushPost",
@@ -101,7 +107,13 @@ export default function useAPIHandlers(API) {
 	API.addInMessageListener(
 		({ event }) => "deleted" === event,
 		({ type, data }) => {
+			if (!type) {
+				return
+			}
+
 			const action = ({
+				// TODO: Handle board deletion
+				board: undefined,
 				post: "unregisterPost",
 				thread: "unregisterThread",
 			})[type]
@@ -113,7 +125,7 @@ export default function useAPIHandlers(API) {
 	API.addInMessageListener(
 		({ error }) => Boolean(error),
 		({ error }) => {
-			const text = error.description || `Error ${error.message} occured` || "Unexpected error occured"
+			const text = error!.description || `Error ${error!.message} occured` || "Unexpected error occured"
 			toast.error(text, { position: "top-right" })
 		}
 	)
diff --git a/src/store/index.ts b/src/store/index.ts
index f16892d..42784fd 100644
--- a/src/store/index.ts
+++ b/src/store/index.ts
@@ -4,14 +4,14 @@ type Board = {
 	name: string
 }
 
-type Thread = {
+export type Thread = {
 	id: number
 	boardName: Board["name"]
 	head: Post
 	posts: number
 }
 
-type Post = {
+export type Post = {
 	id: number
 	threadId: Thread["id"]
 }