diff --git a/package-lock.json b/package-lock.json
index 2d9d06e..5cea0df 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2086,7 +2086,7 @@
     },
     "node_modules/@oneblink/types": {
       "version": "1.0.0",
-      "resolved": "git+ssh://git@github.com/oneblink/types.git#4a3fbd809a2094d1606ce5ee29ea9ccf0031928b",
+      "resolved": "git+ssh://git@github.com/oneblink/types.git#69414e93190c9ffa4d2a8ff0cc0b948d588fc3cd",
       "dev": true,
       "engines": {
         "node": ">=16",
diff --git a/src/OneBlinkUploader.ts b/src/OneBlinkUploader.ts
index 5980ba4..756e0f5 100644
--- a/src/OneBlinkUploader.ts
+++ b/src/OneBlinkUploader.ts
@@ -228,17 +228,11 @@ export default class OneBlinkUploader {
     createdAt,
     title,
     lastElementUpdated,
-    localKey,
     onProgress,
     abortSignal,
   }: UploadFormSubmissionOptions & {
-    /**
-     * The identifier of the draft that a new version should be created for. Set
-     * to `undefined` to create a new draft.
-     */
-    formSubmissionDraftId?: string
-    /** The identifier used to store the draft locally for offline capability */
-    localKey: string
+    /** The identifier of the draft that a new version should be created for. */
+    formSubmissionDraftId: string
     /**
      * The date and time (in ISO format) when the draft data was saved by a
      * user.
@@ -261,16 +255,13 @@ export default class OneBlinkUploader {
       jobId,
     })
 
-    let key = 'form-submission-drafts'
-    if (formSubmissionDraftId) {
-      key += `/${formSubmissionDraftId}`
-    }
+    tags.append('formSubmissionDraftId', formSubmissionDraftId)
 
     return await uploadToS3<SubmissionTypes.FormSubmissionDraftVersion>({
       ...this,
       contentType: 'application/json',
       body: JSON.stringify(newS3SubmissionData),
-      key,
+      key: 'form-submission-draft-versions',
       tags,
       abortSignal,
       onProgress,
@@ -283,9 +274,9 @@ export default class OneBlinkUploader {
         taskGroupInstanceId,
         jobId,
         previousFormSubmissionApprovalId,
-        localKey,
         createdAt,
         title,
+        formSubmissionDraftId,
       },
     })
   }