diff --git a/Cargo.lock b/Cargo.lock
index 86a1e3e..0c2fff0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2217,7 +2217,7 @@ checksum = "436b050e76ed2903236f032a59761c1eb99e1b0aead2c257922771dab1fc8c78"
 
 [[package]]
 name = "reminder-rs"
-version = "1.6.15-2"
+version = "1.6.16"
 dependencies = [
  "base64 0.21.2",
  "chrono",
diff --git a/postman/src/sender.rs b/postman/src/sender.rs
index 6201bef..eaffab9 100644
--- a/postman/src/sender.rs
+++ b/postman/src/sender.rs
@@ -151,7 +151,7 @@ impl Embed {
                 embed.description = substitute(&embed.description);
                 embed.footer = substitute(&embed.footer);
 
-                embed.fields.iter_mut().for_each(|mut field| {
+                embed.fields.iter_mut().for_each(|field| {
                     field.title = substitute(&field.title);
                     field.value = substitute(&field.value);
                 });