diff --git a/frontend/src/lib/components/card/Card.svelte b/frontend/src/lib/components/card/Card.svelte
index e1fdc80..38de2ae 100644
--- a/frontend/src/lib/components/card/Card.svelte
+++ b/frontend/src/lib/components/card/Card.svelte
@@ -1,9 +1,8 @@
 <script lang="ts">
 	import currentDraggedCard from '$lib/stores/currentDraggedCard';
 	import currentModalCard from '$lib/stores/currentModalCard';
-	import project_tags from '$lib/stores/projectTags';
 	import type Card from '$lib/types/Card';
-	import ModalCard from './ModalCard.svelte';
+	// import ModalCard from './ModalCard.svelte';
 
 	export let card: Card;
 </script>
@@ -21,25 +20,21 @@
 		}
 	}}
 >
-	<div class="title">{card.title}</div>
-	{#if card.tags}
-		<div class="tags">
-			{#each card.tags as tag}
-				{#if tag.option_id}
-					{#if $project_tags[tag.tag_id]}
-						<span class="tag" style="border: 1px solid #333">
-							{$project_tags[tag.tag_id]?.options.find((o) => o.id == tag.option_id)?.value}</span
-						>
-					{/if}
-				{:else if tag.value}
-					<span class="tag" style="border: 1px solid #333">{tag.value}</span>
-				{/if}
-			{/each}
-		</div>
-	{/if}
+	<div class="title">{card.id} - {card.title}</div>
+	<div class="tags">
+		{#each card.cardTags as tag}
+			{#if tag.option}
+				<span class="tag" style="border: 1px solid #333"
+					>{tag.projectTag.id}: {tag.option.id} ({tag.option.value})</span
+				>
+			{:else if tag.value}
+				<span class="tag" style="border: 1px solid #333">{tag.value}</span>
+			{/if}
+		{/each}
+	</div>
 </div>
 
-<ModalCard bind:card />
+<!-- <ModalCard bind:card /> -->
 
 <style lang="less">
 	.card {
diff --git a/frontend/src/lib/components/project/Column.svelte b/frontend/src/lib/components/project/Column.svelte
index d368bcc..acfea67 100644
--- a/frontend/src/lib/components/project/Column.svelte
+++ b/frontend/src/lib/components/project/Column.svelte
@@ -1,39 +1,43 @@
 <script lang="ts">
-	import Card from '$lib/types/Card';
+	import Card, { cards } from '$lib/types/Card';
 	import CardComponent from '../card/Card.svelte';
 	import AddIcon from '../icons/AddIcon.svelte';
 	import type TagOption from '$lib/types/TagOption';
 	import type ProjectTag from '$lib/types/ProjectTag';
 	import type Project from '$lib/types/Project';
+	import currentDraggedCard from '$lib/stores/currentDraggedCard';
 
 	export let project: Project;
 	export let option: TagOption | null = null;
 	export let primaryTag: ProjectTag | null = null;
-	export let title: string;
 	export let columnCards: Card[] = [];
 
-	let lastTitle = title;
+	let newOptionValue = option?.value || `No ${primaryTag?.title}`;
 
-	// async function onDrop(e: DragEvent) {
-	// 	e.preventDefault();
-	// 	if (!$currentDraggedCard || !$currentDraggedCard.cardTags) return;
+	async function onDrop(e: DragEvent) {
+		e.preventDefault();
+		if (!primaryTag || !$currentDraggedCard || !$currentDraggedCard.cardTags) return;
 
-	// 	$currentDraggedCard;
+		const currentCardTag =
+			$currentDraggedCard.cardTags.find((tag) => tag.projectTag === primaryTag) || null;
+		const currentOption = currentCardTag?.option || null;
 
-	// 	for (let tag of $currentDraggedCard.cardTags) {
-	// 		if (tag.projectTag !== primaryTag) continue;
-	// 		if (tag.option == option) return;
+		if (currentOption === option) return;
 
-	// 		if (!tag.option && !tag.value) await tag.delete();
-	// 		else if (tag.option && optionId)
-	// 			await createCardTagApi(tag.card_id, tag.tag_id, tag.option_id, tag.value);
-	// 		else await updateCardTagApi(tag.card_id, tag.tag_id, optionId, tag.value);
+		if (!currentOption && option) {
+			await $currentDraggedCard.addTag(primaryTag, option, null);
+		} else if (currentOption && !option) {
+			if (!currentCardTag) return;
+			await $currentDraggedCard.removeTag(currentCardTag);
+		} else if (currentOption && option) {
+			if (!currentCardTag) return;
+			await $currentDraggedCard.updateTag(currentCardTag, option, null);
+		}
 
-	// 		tag.option_id = optionId;
-	// 		cards.reload();
-	// 	}
-	// 	currentDraggedCard.set(null);
-	// }
+		currentDraggedCard.set(null);
+
+		cards.reload();
+	}
 
 	async function addCard() {
 		const card = await Card.create(project);
@@ -43,33 +47,30 @@
 		if (!option) return;
 
 		await card.addTag(primaryTag, option, null);
+
+		cards.reload();
 	}
 </script>
 
-<!-- on:drop={onDrop} -->
 <div
 	class="column"
 	role="listbox"
 	tabindex="-1"
+	on:drop={onDrop}
 	on:dragover={(e) => {
 		e.preventDefault();
 	}}
 >
 	<header>
 		<input
-			bind:value={title}
+			bind:value={newOptionValue}
 			type="text"
 			on:blur={async () => {
-				if (lastTitle === title) return;
 				if (!option || !primaryTag) return;
-				// option;
-				// await updateTagOptionAPI({
-				// 	id: optionId,
-				// 	tag_id: primary_tag_id,
-				// 	value: title
-				// });
-				// lastTitle = title;
-				// cards.reload();
+				if (newOptionValue === option.value) return;
+
+				await option.setValue(newOptionValue);
+				newOptionValue = option.value;
 			}}
 			disabled={option === null}
 		/>
diff --git a/frontend/src/lib/components/project/Project.svelte b/frontend/src/lib/components/project/Project.svelte
index 008f1ac..c5e757d 100644
--- a/frontend/src/lib/components/project/Project.svelte
+++ b/frontend/src/lib/components/project/Project.svelte
@@ -6,21 +6,22 @@
 	import Header from './Header.svelte';
 
 	export let project: Project;
+
+	$: allCards = $cards;
 </script>
 
 {#if project}
 	<section>
 		{#if $currentView}
 			<Header {project} />
-			{#if $cards}
+			{#if $cards && allCards}
 				<div class="grid">
 					{#if $currentView.primaryTag}
 						{#each $currentView.primaryTag.options as option}
 							<Column
 								{option}
 								primaryTag={$currentView.primaryTag}
-								title={option.value}
-								columnCards={$cards
+								columnCards={allCards
 									.filter((c) => c.cardTags.map((t) => t.option).includes(option))
 									.sort((a, b) => {
 										if (!$currentView?.sortTag) return 0;
@@ -43,15 +44,14 @@
 					{/if}
 					<Column
 						primaryTag={$currentView.primaryTag}
-						title={$currentView.primaryTag ? `No ${$currentView.title}` : 'No groups'}
 						columnCards={$currentView.primaryTag != null
 							? (() => {
 									const primaryTag = $currentView.primaryTag;
-									return $cards.filter(
+									return allCards.filter(
 										(c) => !c.cardTags.map((t) => t.projectTag).includes(primaryTag)
 									);
 								})()
-							: $cards}
+							: allCards}
 						{project}
 					/>
 				</div>
diff --git a/frontend/src/lib/types/Card.ts b/frontend/src/lib/types/Card.ts
index be70b47..7dc9e3b 100644
--- a/frontend/src/lib/types/Card.ts
+++ b/frontend/src/lib/types/Card.ts
@@ -6,7 +6,14 @@ import { toastAlert } from '$lib/utils/toasts';
 import type TagOption from './TagOption';
 import type ProjectTag from './ProjectTag';
 
-export const cards = writable([] as Card[]);
+const { subscribe, set, update } = writable([] as Card[]);
+
+export const cards = {
+	subscribe,
+	set,
+	update,
+	reload: () => update((cards) => cards)
+};
 
 export default class Card {
 	private _id: number;
@@ -90,16 +97,35 @@ export default class Card {
 
 		if (!cardTag) return false;
 
-		this._cardTags.push(cardTag);
+		this._cardTags = [...this._cardTags, cardTag];
 
 		return true;
 	}
 
+	async removeTag(cardTag: CardTag): Promise<boolean> {
+		const res = await cardTag.delete();
+
+		if (!res) return false;
+
+		this._cardTags = this._cardTags.filter((ct) => ct !== cardTag);
+
+		return true;
+	}
+
+	async updateTag(
+		cardTag: CardTag,
+		tagOption: TagOption | null,
+		value: string | null
+	): Promise<boolean> {
+		return await cardTag.update(tagOption, value);
+	}
+
 	static parse(json: any): Card | null;
 	static parse(json: any, project: Project | null | undefined): Card | null;
 
 	static parse(json: any, project?: Project | null | undefined): Card | null {
 		if (json === null) {
+			toastAlert('Failed to parse card: json is null');
 			return null;
 		}
 
diff --git a/frontend/src/lib/types/CardTag.ts b/frontend/src/lib/types/CardTag.ts
index 54ae677..10be45f 100644
--- a/frontend/src/lib/types/CardTag.ts
+++ b/frontend/src/lib/types/CardTag.ts
@@ -1,4 +1,5 @@
 import cardsTagsApi from '$lib/api/cardsTagsApi';
+import { toastAlert } from '$lib/utils/toasts';
 import Card from './Card';
 import ProjectTag from './ProjectTag';
 import TagOption from './TagOption';
@@ -21,16 +22,16 @@ export default class CardTag {
 		this._value = value;
 	}
 
-	get card(): number {
-		return this.card;
+	get card(): Card {
+		return this._card;
 	}
 
 	get projectTag(): ProjectTag {
-		return this.projectTag;
+		return this._projectTag;
 	}
 
 	get option(): TagOption | null {
-		return this.option;
+		return this._option;
 	}
 
 	get value(): string | null {
@@ -43,31 +44,58 @@ export default class CardTag {
 		option: TagOption | null,
 		value: string | null
 	): Promise<CardTag | null> {
-		const id = await cardsTagsApi.create(card.id, tag.id, option ? option.id : null, value);
+		const res = await cardsTagsApi.create(card.id, tag.id, option ? option.id : null, value);
 
-		if (!id) return null;
+		if (!res) return null;
 
 		return new CardTag(card, tag, option, value);
 	}
 
-	async delete() {
+	async delete(): Promise<boolean> {
 		return cardsTagsApi.delete(this._card.id, this._projectTag.id);
 	}
 
+	async update(option: TagOption | null, value: string | null): Promise<boolean> {
+		const res = await cardsTagsApi.update(
+			this._card.id,
+			this._projectTag.id,
+			option ? option.id : null,
+			value
+		);
+
+		if (!res) return false;
+
+		this._option = option;
+		this._value = value;
+
+		return true;
+	}
+
 	static parse(json: any): CardTag | null;
 	static parse(json: any, card: Card | null | undefined): CardTag | null;
 
 	static parse(json: any, card?: Card | null | undefined): CardTag | null {
-		if (!json) return null;
+		if (!json) {
+			toastAlert('Failed to parse card tag: json is null');
+			return null;
+		}
 
 		if (!card) card = Card.fromId(json.card_id);
-		if (!card) return null;
-
+		if (!card) {
+			toastAlert('Failed to parse card tag: card is null');
+			return null;
+		}
 		const tag = ProjectTag.fromId(json.tag_id);
-		if (!tag) return null;
+		if (!tag) {
+			toastAlert('Failed to parse card tag: tag is null');
+			return null;
+		}
 
 		const option = tag.options.find((option) => option.id === json.option_id);
-		if (!option) return null;
+		if (!option) {
+			toastAlert('Failed to parse card tag: option is null');
+			return null;
+		}
 
 		return new CardTag(card, tag, option, json.value);
 	}
diff --git a/frontend/src/lib/types/TagOption.ts b/frontend/src/lib/types/TagOption.ts
index d38f6fe..e2b0c0e 100644
--- a/frontend/src/lib/types/TagOption.ts
+++ b/frontend/src/lib/types/TagOption.ts
@@ -1,3 +1,4 @@
+import tagsOptions from '$lib/api/tagsOptions';
 import ProjectTag from './ProjectTag';
 
 export default class TagOption {
@@ -23,6 +24,16 @@ export default class TagOption {
 		return this._value;
 	}
 
+	async setValue(value: string): Promise<boolean> {
+		const res = await tagsOptions.update(this._id, this.projectTag.id, value);
+
+		if (!res) return false;
+
+		this._value = value;
+
+		return res;
+	}
+
 	static parse(json: any): TagOption | null;
 	static parse(json: any, projectTag: ProjectTag | null | undefined): TagOption | null;