diff --git a/packages/app/src/components/prompt-input/attachments.ts b/packages/app/src/components/prompt-input/attachments.ts
index b384bf7d8..0f778b518 100644
--- a/packages/app/src/components/prompt-input/attachments.ts
+++ b/packages/app/src/components/prompt-input/attachments.ts
@@ -31,7 +31,7 @@ export function createPromptAttachments(input: PromptAttachmentsInput) {
       const dataUrl = reader.result as string
       const attachment: ImageAttachmentPart = {
         type: "image",
-        id: crypto.randomUUID(),
+        id: crypto.randomUUID?.() ?? Math.random().toString(16).slice(2),
         filename: file.name,
         mime: file.type,
         dataUrl,
diff --git a/packages/app/src/context/comments.tsx b/packages/app/src/context/comments.tsx
index d43f3705b..b91f029bc 100644
--- a/packages/app/src/context/comments.tsx
+++ b/packages/app/src/context/comments.tsx
@@ -53,7 +53,7 @@ function createCommentSessionState(store: Store<CommentStore>, setStore: SetStor
 
   const add = (input: Omit<LineComment, "id" | "time">) => {
     const next: LineComment = {
-      id: crypto.randomUUID(),
+      id: crypto.randomUUID?.() ?? Math.random().toString(16).slice(2),
       time: Date.now(),
       ...input,
     }