diff --git a/src/lib/api/adapters/artifact.adapter.ts b/src/lib/api/adapters/artifact.adapter.ts
index 9665c5e4..0b2d3084 100644
--- a/src/lib/api/adapters/artifact.adapter.ts
+++ b/src/lib/api/adapters/artifact.adapter.ts
@@ -42,7 +42,7 @@ export interface CollectionArtifactListParams {
 	limit?: number
 	element?: number | number[]
 	artifactId?: string
-	proficiency?: number
+	proficiency?: number | number[]
 	rarity?: 'standard' | 'quirk'
 	// Skill filters - each slot accepts array of modifier IDs (OR logic within slot, AND across slots)
 	skill1?: number[]
diff --git a/src/routes/(app)/[username]/collection/artifacts/+page.svelte b/src/routes/(app)/[username]/collection/artifacts/+page.svelte
index f4bda99d..4ae72868 100644
--- a/src/routes/(app)/[username]/collection/artifacts/+page.svelte
+++ b/src/routes/(app)/[username]/collection/artifacts/+page.svelte
@@ -110,7 +110,7 @@
 	// Build filters for query
 	const queryFilters = $derived({
 		element: elementFilters.length > 0 ? elementFilters : undefined,
-		proficiency: proficiencyFilters.length > 0 ? proficiencyFilters[0] : undefined,
+		proficiency: proficiencyFilters.length > 0 ? proficiencyFilters : undefined,
 		rarity: rarityFilter !== 'all' ? rarityFilter : undefined,
 		skill1: slot1Filters.length > 0 ? slot1Filters : undefined,
 		skill2: slot2Filters.length > 0 ? slot2Filters : undefined,
@@ -355,9 +355,9 @@
 
 	.artifact-grid {
 		display: grid;
-		grid-template-columns: repeat(5, 100px);
+		grid-template-columns: repeat(5, 139px);
 		justify-content: space-between;
-		gap: $unit-4x;
+		gap: $unit-4x $unit-2x;
 	}
 
 	.artifact-list {