diff --git a/packages/api/src/router/user.ts b/packages/api/src/router/user.ts
index 8ee07b62e..ebb0b432b 100644
--- a/packages/api/src/router/user.ts
+++ b/packages/api/src/router/user.ts
@@ -114,11 +114,10 @@ export const userRouter = createTRPCRouter({
     .input(
       z.object({
         userId: z.string(),
-        // Max image size of 256KB, only png and jpeg are allowed
         image: z
           .string()
           .regex(/^data:image\/(png|jpeg|gif|webp);base64,[A-Za-z0-9/+]+=*$/g)
-          .max(262144)
+          .max(350000) // approximately 256KB in base64 (256 * 1024 * 4 / 3 + prefixes)
           .nullable(),
       }),
     )