diff --git a/src/components/home/navigation.vue b/src/components/home/navigation.vue
index 6c3e7a496..1564aef2f 100644
--- a/src/components/home/navigation.vue
+++ b/src/components/home/navigation.vue
@@ -225,7 +225,7 @@ function resize() {
 	store.commit(MENU_ACTIVE, window.innerWidth >= 770)
 }
 
-function toggleLists(namespaceId: number) {
+function toggleLists(namespaceId: NamespaceModel['id']) {
 	listsVisible.value[namespaceId] = !listsVisible.value[namespaceId]
 }
 
diff --git a/src/components/input/fancycheckbox.vue b/src/components/input/fancycheckbox.vue
index 204efeec6..31380bf9f 100644
--- a/src/components/input/fancycheckbox.vue
+++ b/src/components/input/fancycheckbox.vue
@@ -53,7 +53,7 @@ export default defineComponent({
 		},
 	},
 	methods: {
-		updateData(checked) {
+		updateData(checked: boolean) {
 			this.checked = checked
 			this.$emit('update:modelValue', checked)
 			this.$emit('change', checked)
diff --git a/src/components/sharing/linkSharing.vue b/src/components/sharing/linkSharing.vue
index 74cae27ac..b38a58341 100644
--- a/src/components/sharing/linkSharing.vue
+++ b/src/components/sharing/linkSharing.vue
@@ -182,6 +182,7 @@ import {useI18n} from 'vue-i18n'
 
 import {RIGHTS} from '@/models/constants/rights'
 import LinkShareModel from '@/models/linkShare'
+import type ListModel from '@/models/list'
 
 import LinkShareService from '@/services/linkShare'
 
@@ -216,7 +217,7 @@ watch(
 const store = useStore()
 const frontendUrl = computed(() => store.state.config.frontendUrl)
 
-async function load(listId) {
+async function load(listId: ListModel['id']) {
 	// If listId == 0 the list on the calling component wasn't already loaded, so we just bail out here
 	if (listId === 0) {
 		return
@@ -225,7 +226,7 @@ async function load(listId) {
 	linkShares.value = await linkShareService.getAll({listId})
 }
 
-async function add(listId) {
+async function add(listId: ListModel['id']) {
 	const newLinkShare = new LinkShareModel({
 		right: selectedRight.value,
 		listId,
@@ -241,7 +242,7 @@ async function add(listId) {
 	await load(listId)
 }
 
-async function remove(listId) {
+async function remove(listId: ListModel['id']) {
 	try {
 		await linkShareService.delete(new LinkShareModel({
 			id: linkIdToDelete.value,
diff --git a/src/components/sharing/userTeam.vue b/src/components/sharing/userTeam.vue
index 6920102ca..c14902aa7 100644
--- a/src/components/sharing/userTeam.vue
+++ b/src/components/sharing/userTeam.vue
@@ -355,7 +355,7 @@ async function toggleType(sharable) {
 const found = ref([])
 
 const currentUserId = computed(() => store.state.auth.info.id)
-async function find(query) {
+async function find(query: string) {
 	if (query === '') {
 		found.value = []
 		return
diff --git a/src/components/tasks/partials/attachments.vue b/src/components/tasks/partials/attachments.vue
index 71bb95142..20981470c 100644
--- a/src/components/tasks/partials/attachments.vue
+++ b/src/components/tasks/partials/attachments.vue
@@ -142,6 +142,7 @@ import {defineComponent} from 'vue'
 
 import AttachmentService from '../../../services/attachment'
 import AttachmentModel from '../../../models/attachment'
+import type FileModel from '@/models/file'
 import User from '@/components/misc/user.vue'
 import {mapState} from 'vuex'
 
@@ -234,7 +235,7 @@ export default defineComponent({
 
 			this.uploadFiles(this.$refs.files.files)
 		},
-		uploadFiles(files) {
+		uploadFiles(files: FileModel[]) {
 			uploadFiles(this.attachmentService, this.taskId, files)
 		},
 		async deleteAttachment() {
diff --git a/src/components/tasks/partials/comments.vue b/src/components/tasks/partials/comments.vue
index c1e83faae..fe5218ad4 100644
--- a/src/components/tasks/partials/comments.vue
+++ b/src/components/tasks/partials/comments.vue
@@ -163,6 +163,7 @@ import TaskCommentModel from '@/models/taskComment'
 import {uploadFile} from '@/helpers/attachments'
 import {success} from '@/message'
 import {formatDateLong, formatDateSince} from '@/helpers/time/formatDate'
+import type TaskModel from '@/models/task'
 
 const props = defineProps({
 	taskId: {
@@ -214,7 +215,7 @@ function attachmentUpload(...args) {
 
 const taskCommentService = shallowReactive(new TaskCommentService())
 
-async function loadComments(taskId) {
+async function loadComments(taskId: TaskModel['id']) {
 	if (!enabled.value) {
 		return
 	}
@@ -263,7 +264,7 @@ function toggleEdit(comment: TaskCommentModel) {
 	Object.assign(commentEdit, comment)
 }
 
-function toggleDelete(commentId) {
+function toggleDelete(commentId: TaskCommentModel['id']) {
 	showDeleteModal.value = !showDeleteModal.value
 	commentToDelete.id = commentId
 }
diff --git a/src/components/tasks/partials/editAssignees.vue b/src/components/tasks/partials/editAssignees.vue
index c994b9651..30aa44275 100644
--- a/src/components/tasks/partials/editAssignees.vue
+++ b/src/components/tasks/partials/editAssignees.vue
@@ -95,7 +95,7 @@ async function removeAssignee(user: UserModel) {
 	success({message: t('task.assignee.unassignSuccess')})
 }
 
-async function findUser(query) {
+async function findUser(query: string) {
 	if (query === '') {
 		clearAllFoundUsers()
 		return
diff --git a/src/components/tasks/partials/relatedTasks.vue b/src/components/tasks/partials/relatedTasks.vue
index 3709b17dd..07c24b332 100644
--- a/src/components/tasks/partials/relatedTasks.vue
+++ b/src/components/tasks/partials/relatedTasks.vue
@@ -216,7 +216,7 @@ export default defineComponent({
 		},
 	},
 	methods: {
-		async findTasks(query) {
+		async findTasks(query: string) {
 			this.query = query
 			this.foundTasks = await this.taskService.getAll({}, {s: query})
 		},
diff --git a/src/components/tasks/partials/singleTaskInList.vue b/src/components/tasks/partials/singleTaskInList.vue
index 70dc9fab6..39e9ab255 100644
--- a/src/components/tasks/partials/singleTaskInList.vue
+++ b/src/components/tasks/partials/singleTaskInList.vue
@@ -207,7 +207,7 @@ export default defineComponent({
 			}
 		},
 
-		undoDone(checked) {
+		undoDone(checked: boolean) {
 			this.task.done = !this.task.done
 			this.markAsDone(!checked)
 		},
diff --git a/src/services/accountDelete.ts b/src/services/accountDelete.ts
index c4f443cfe..52e922caf 100644
--- a/src/services/accountDelete.ts
+++ b/src/services/accountDelete.ts
@@ -1,15 +1,15 @@
 import AbstractService from './abstractService'
 
 export default class AccountDeleteService extends AbstractService {
-	request(password) {
-		return this.post('/user/deletion/request', {password: password})
+	request(password: string) {
+		return this.post('/user/deletion/request', {password})
 	}
 	
-	confirm(token) {
-		return this.post('/user/deletion/confirm', {token: token})
+	confirm(token: string) {
+		return this.post('/user/deletion/confirm', {token})
 	}
 	
-	cancel(password) {
-		return this.post('/user/deletion/cancel', {password: password})
+	cancel(password: string) {
+		return this.post('/user/deletion/cancel', {password})
 	}
 }
\ No newline at end of file
diff --git a/src/services/backgroundUpload.ts b/src/services/backgroundUpload.ts
index 8f9dcf622..0f9d9792d 100644
--- a/src/services/backgroundUpload.ts
+++ b/src/services/backgroundUpload.ts
@@ -22,9 +22,9 @@ export default class BackgroundUploadService extends AbstractService {
 	 * @param file
 	 * @returns {Promise<any|never>}
 	 */
-	create(listId, file) {
+	create(listId: ListModel['id'], file) {
 		return this.uploadFile(
-			this.getReplacedRoute(this.paths.create, {listId: listId}),
+			this.getReplacedRoute(this.paths.create, {listId}),
 			file,
 			'background',
 		)
diff --git a/src/services/dataExport.ts b/src/services/dataExport.ts
index 9f8720bf7..3c4064ac4 100644
--- a/src/services/dataExport.ts
+++ b/src/services/dataExport.ts
@@ -2,11 +2,11 @@ import AbstractService from './abstractService'
 import {downloadBlob} from '../helpers/downloadBlob'
 
 export default class DataExportService extends AbstractService {
-	request(password) {
-		return this.post('/user/export/request', {password: password})
+	request(password: string) {
+		return this.post('/user/export/request', {password})
 	}
 	
-	async download(password) {
+	async download(password: string) {
 		const clear = this.setLoading()
 		try {
 			const url = await this.getBlobUrl('/user/export/download', 'POST', {password})
diff --git a/src/views/filters/FilterDelete.vue b/src/views/filters/FilterDelete.vue
index 15238ec00..0f2c6fbf8 100644
--- a/src/views/filters/FilterDelete.vue
+++ b/src/views/filters/FilterDelete.vue
@@ -27,7 +27,7 @@ const route = useRoute()
 
 async function deleteSavedFilter() {
 	// We assume the listId in the route is the pseudolist
-	const savedFilterId = getSavedFilterIdFromListId(route.params.listId)
+	const savedFilterId = getSavedFilterIdFromListId(Number((route.params.listId as string)))
 
 	const filterService = new SavedFilterService()
 	const filter = new SavedFilterModel({id: savedFilterId})
diff --git a/src/views/filters/FilterEdit.vue b/src/views/filters/FilterEdit.vue
index 109057925..60209ee00 100644
--- a/src/views/filters/FilterEdit.vue
+++ b/src/views/filters/FilterEdit.vue
@@ -52,11 +52,12 @@
 </template>
 
 <script setup lang="ts">
-import { ref, shallowRef, computed, watch } from 'vue'
+import { ref, shallowRef, computed, watch, unref } from 'vue'
 import { useRouter, useRoute } from 'vue-router'
 import { store } from '@/store'
 import { success }  from '@/message'
 import { useI18n } from 'vue-i18n'
+import type {MaybeRef} from '@vueuse/core'
 
 import {default as Editor} from '@/components/input/AsyncEditor'
 import CreateEdit from '@/components/misc/create-edit.vue'
@@ -67,10 +68,11 @@ import SavedFilterService from '@/services/savedFilter'
 
 import {objectToSnakeCase} from '@/helpers/case'
 import {getSavedFilterIdFromListId} from '@/helpers/savedFilter'
+import type ListModel from '@/models/list'
 
 const { t } = useI18n({useScope: 'global'})
 
-function useSavedFilter(listId) {
+function useSavedFilter(listId: MaybeRef<ListModel['id']>) {
 	const filterService = shallowRef(new SavedFilterService())
 
 	const filter = ref(new SavedFilterModel())
@@ -82,9 +84,9 @@ function useSavedFilter(listId) {
 	})
 	
 	// loadSavedFilter
-	watch(listId, async () => {
+	watch(() => unref(listId), async () => {
 		// We assume the listId in the route is the pseudolist
-		const savedFilterId = getSavedFilterIdFromListId(route.params.listId)
+		const savedFilterId = getSavedFilterIdFromListId(Number(route.params.listId as string))
 
 		filter.value = new SavedFilterModel({id: savedFilterId })
 		const response = await filterService.value.get(filter.value)
@@ -110,7 +112,7 @@ function useSavedFilter(listId) {
 }
 
 const route = useRoute()
-const listId =	computed(() => route.params.listId)
+const listId =	computed(() => Number(route.params.listId as string))
 
 const {
 	save,
diff --git a/src/views/labels/ListLabels.vue b/src/views/labels/ListLabels.vue
index 9d1a35764..227d140a5 100644
--- a/src/views/labels/ListLabels.vue
+++ b/src/views/labels/ListLabels.vue
@@ -147,7 +147,7 @@ export default defineComponent({
 		loading: state => state[LOADING] && state[LOADING_MODULE] === 'labels',
 	}),
 	methods: {
-		deleteLabel(label) {
+		deleteLabel(label: LabelModel) {
 			this.showDeleteModal = false
 			this.isLabelEdit = false
 			return this.$store.dispatch('labels/deleteLabel', label)
@@ -155,7 +155,7 @@ export default defineComponent({
 		editLabelSubmit() {
 			return this.$store.dispatch('labels/updateLabel', this.labelEditLabel)
 		},
-		editLabel(label) {
+		editLabel(label: LabelModel) {
 			if (label.createdBy.id !== this.userInfo.id) {
 				return
 			}
@@ -177,7 +177,7 @@ export default defineComponent({
 			this.editorActive = false
 			this.$nextTick(() => this.editorActive = true)
 		},
-		showDeleteDialoge(label) {
+		showDeleteDialoge(label: LabelModel) {
 			this.labelToDelete = label
 			this.showDeleteModal = true
 		},
diff --git a/src/views/list/ListList.vue b/src/views/list/ListList.vue
index 8ff42b5b4..3c18735b6 100644
--- a/src/views/list/ListList.vue
+++ b/src/views/list/ListList.vue
@@ -148,8 +148,9 @@ import {ALPHABETICAL_SORT} from '@/components/list/partials/filters.vue'
 
 import draggable from 'zhyswan-vuedraggable'
 import {calculateItemPosition} from '../../helpers/calculateItemPosition'
+import type TaskModel from '@/models/task'
 
-function sortTasks(tasks) {
+function sortTasks(tasks: TaskModel[]) {
 	if (tasks === null || tasks === []) {
 		return
 	}
@@ -264,7 +265,7 @@ export default defineComponent({
 		focusNewTaskInput() {
 			this.$refs.addTask.focusTaskInput()
 		},
-		updateTaskList( task ) {
+		updateTaskList(task: TaskModel) {
 			if ( this.isAlphabeticalSorting ) {
 				// reload tasks with current filter and sorting
 				this.loadTasks(1, undefined, undefined, true)
@@ -278,13 +279,13 @@ export default defineComponent({
 
 			this.$store.commit(HAS_TASKS, true)
 		},
-		editTask(id) {
+		editTask(id: TaskModel['id']) {
 			// Find the selected task and set it to the current object
 			let theTask = this.getTaskById(id) // Somehow this does not work if we directly assign this to this.taskEditTask
 			this.taskEditTask = theTask
 			this.isTaskEdit = true
 		},
-		getTaskById(id) {
+		getTaskById(id: TaskModel['id']) {
 			for (const t in this.tasks) {
 				if (this.tasks[t].id === parseInt(id)) {
 					return this.tasks[t]
@@ -292,7 +293,7 @@ export default defineComponent({
 			}
 			return {} // FIXME: This should probably throw something to make it clear to the user noting was found
 		},
-		updateTasks(updatedTask) {
+		updateTasks(updatedTask: TaskModel) {
 			for (const t in this.tasks) {
 				if (this.tasks[t].id === updatedTask.id) {
 					this.tasks[t] = updatedTask
diff --git a/src/views/tasks/TaskDetailView.vue b/src/views/tasks/TaskDetailView.vue
index 74ee10de8..f701e2a4c 100644
--- a/src/views/tasks/TaskDetailView.vue
+++ b/src/views/tasks/TaskDetailView.vue
@@ -445,6 +445,7 @@ import {uploadFile} from '@/helpers/attachments'
 import ChecklistSummary from '../../components/tasks/partials/checklist-summary.vue'
 import CreatedUpdated from '@/components/tasks/partials/createdUpdated.vue'
 import { setTitle } from '@/helpers/setTitle'
+import type ListModel from '@/models/list'
 
 function scrollIntoView(el) {
 	if (!el) {
@@ -584,7 +585,7 @@ export default defineComponent({
 			return uploadFile(this.taskId, ...args)
 		},
 
-		async loadTask(taskId) {
+		async loadTask(taskId: TaskModel['id']) {
 			if (taskId === undefined) {
 				return
 			}
@@ -690,7 +691,7 @@ export default defineComponent({
 			this.saveTask(true, this.toggleTaskDone)
 		},
 
-		async changeList(list) {
+		async changeList(list: ListModel) {
 			this.$store.commit('kanban/removeTaskInBucket', this.task)
 			this.task.listId = list.id
 			await this.saveTask()
diff --git a/src/views/teams/EditTeam.vue b/src/views/teams/EditTeam.vue
index 8496d2f5e..485c5c0a6 100644
--- a/src/views/teams/EditTeam.vue
+++ b/src/views/teams/EditTeam.vue
@@ -257,7 +257,7 @@ async function addUser() {
 	success({message: t('team.edit.userAddedSuccess')})
 }
 
-async function toggleUserType(member) {
+async function toggleUserType(member: TeamMemberModel) {
 	// FIXME: direct manipulation
 	member.admin = !member.admin
 	member.teamId = teamId.value