diff --git a/web/src/lib/types/queue.ts b/web/src/lib/types/queue.ts
index d11993a5..242d75e4 100644
--- a/web/src/lib/types/queue.ts
+++ b/web/src/lib/types/queue.ts
@@ -1,8 +1,10 @@
 import type { CobaltSaveRequestBody } from "$lib/types/api";
 import type { CobaltPipelineItem, CobaltPipelineResultFileType } from "$lib/types/workers";
 
+export type UUID = string;
+
 type CobaltQueueBaseItem = {
-    id: string,
+    id: UUID,
     pipeline: CobaltPipelineItem[],
     canRetry?: boolean,
     originalRequest?: CobaltSaveRequestBody,
@@ -17,7 +19,7 @@ type CobaltQueueItemWaiting = CobaltQueueBaseItem & {
 
 export type CobaltQueueItemRunning = CobaltQueueBaseItem & {
     state: "running",
-    completedWorkers: Set<string>,
+    completedWorkers: Set<UUID>,
     pipelineResults: File[],
 };
 
@@ -37,5 +39,5 @@ export type CobaltQueueItem = CobaltQueueItemWaiting
                             | CobaltQueueItemError;
 
 export type CobaltQueue = {
-    [id: string]: CobaltQueueItem,
+    [id: UUID]: CobaltQueueItem,
 };
diff --git a/web/src/lib/types/task-manager.ts b/web/src/lib/types/task-manager.ts
index 56d099b0..61882cc6 100644
--- a/web/src/lib/types/task-manager.ts
+++ b/web/src/lib/types/task-manager.ts
@@ -1,11 +1,12 @@
 import type { CobaltPipelineItem, CobaltWorkerProgress } from "$lib/types/workers";
+import type { UUID } from "./queue";
 
 export type CobaltCurrentTaskItem = {
     type: CobaltPipelineItem['worker'],
-    parentId: string,
+    parentId: UUID,
     progress?: CobaltWorkerProgress,
 }
 
 export type CobaltCurrentTasks = {
-    [id: string]: CobaltCurrentTaskItem,
+    [id: UUID]: CobaltCurrentTaskItem,
 }
diff --git a/web/src/lib/types/workers.ts b/web/src/lib/types/workers.ts
index 58ab9b0a..56e44baa 100644
--- a/web/src/lib/types/workers.ts
+++ b/web/src/lib/types/workers.ts
@@ -1,4 +1,5 @@
 import type { FileInfo } from "$lib/types/libav";
+import type { UUID } from "./queue";
 
 export const resultFileTypes = ["video", "audio", "image"] as const;
 
@@ -17,9 +18,9 @@ type CobaltFFmpegWorkerArgs = {
 };
 
 type CobaltPipelineItemBase = {
-    workerId: string,
-    parentId: string,
-    dependsOn?: string[],
+    workerId: UUID,
+    parentId: UUID,
+    dependsOn?: UUID[],
 };
 
 type CobaltRemuxPipelineItem = CobaltPipelineItemBase & {