diff --git a/crates/core/models/src/v0/messages.rs b/crates/core/models/src/v0/messages.rs
index 1ef8aab0..2116d98b 100644
--- a/crates/core/models/src/v0/messages.rs
+++ b/crates/core/models/src/v0/messages.rs
@@ -215,7 +215,7 @@ auto_derived!(
     #[derive(Default)]
     #[cfg_attr(feature = "validator", derive(Validate))]
     pub struct SendableEmbed {
-        #[cfg_attr(feature = "validator", validate(length(min = 1, max = 128)))]
+        #[cfg_attr(feature = "validator", validate(length(min = 1, max = 256)))]
         pub icon_url: Option<String>,
         #[cfg_attr(feature = "validator", validate(length(min = 1, max = 256)))]
         pub url: Option<String>,