diff --git a/backend/Cargo.lock b/backend/Cargo.lock
index 08d9041..cb4ccd4 100644
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -1130,9 +1130,9 @@ checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
 
 [[package]]
 name = "lettre"
-version = "0.11.20"
+version = "0.11.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "471816f3e24b85e820dee02cde962379ea1a669e5242f19c61bcbcffedf4c4fb"
+checksum = "dabda5859ee7c06b995b9d1165aa52c39110e079ef609db97178d86aeb051fa7"
 dependencies = [
  "async-trait",
  "base64",