diff --git a/buds/10.md b/buds/10.md
index 7228978..2257abe 100644
--- a/buds/10.md
+++ b/buds/10.md
@@ -10,7 +10,7 @@ Breaking large blobs into smaller chunks for distribution
 
 The client MAY break large blobs into any number or size of chunks. although its recommended to use the size `1Mb` or `4Mb` for small and large chunks
 
-Clients SHOULD not pad the remaining chunk, If clients need privacy they should use random chunk sizes and optionally encrypt the large blob
+Clients MUST NOT pad the remaining chunk, If clients need privacy they should use random chunk sizes and optionally encrypt the large blob
 
 Clients MUST create a merkle tree using the chunk hashes as the leaf nodes