diff --git a/apps/server/src/server/api/contracts/crypto.contract.ts b/apps/server/src/server/api/contracts/crypto.contract.ts
index 785f926..052e48f 100644
--- a/apps/server/src/server/api/contracts/crypto.contract.ts
+++ b/apps/server/src/server/api/contracts/crypto.contract.ts
@@ -55,7 +55,7 @@ export const signAndPackReport = oc
       enterpriseId: z.string().min(1),
       inspectionId: z.string().min(1),
       summary: z.string().min(1),
-      rawZipBase64: z.string().min(1),
+      rawZip: z.file().mime(['application/zip', 'application/x-zip-compressed']),
     }),
   )
   .output(
diff --git a/apps/server/src/server/api/routers/crypto.router.ts b/apps/server/src/server/api/routers/crypto.router.ts
index 071b6c4..ee3cf6c 100644
--- a/apps/server/src/server/api/routers/crypto.router.ts
+++ b/apps/server/src/server/api/routers/crypto.router.ts
@@ -222,11 +222,12 @@ export const encryptSummary = os.crypto.encryptSummary.use(db).handler(async ({
 
 export const signAndPackReport = os.crypto.signAndPackReport.use(db).handler(async ({ context, input }) => {
   const device = await getDevice(context, input.deviceId)
-  const rawZipBytes = Buffer.from(input.rawZipBase64, 'base64')
+  const rawZipArrayBuffer = await input.rawZip.arrayBuffer()
+  const rawZipBytes = Buffer.from(rawZipArrayBuffer)
 
   if (rawZipBytes.byteLength === 0 || rawZipBytes.byteLength > MAX_RAW_ZIP_BYTES) {
     throw new ORPCError('BAD_REQUEST', {
-      message: 'rawZipBase64 is empty or exceeds max size limit',
+      message: 'rawZip is empty or exceeds max size limit',
     })
   }
 
@@ -234,7 +235,7 @@ export const signAndPackReport = os.crypto.signAndPackReport.use(db).handler(asy
     checkCRC32: true,
   }).catch(() => {
     throw new ORPCError('BAD_REQUEST', {
-      message: 'rawZipBase64 is not a valid zip file',
+      message: 'rawZip is not a valid zip file',
     })
   })