diff --git a/crates/katana/src/args.rs b/crates/katana/src/args.rs
index 0bbdce35e7..070f5b6c56 100644
--- a/crates/katana/src/args.rs
+++ b/crates/katana/src/args.rs
@@ -63,7 +63,7 @@ pub struct KatanaArgs {
     #[arg(help = "Configure the messaging with an other chain.")]
     #[arg(long_help = "Configure the messaging to allow Katana listening/sending messages on a \
                        settlement chain that can be Ethereum or an other Starknet sequencer. \
-                       The configuration file details and examples can be found here: TODO.")]
+                       The configuration file details and examples can be found here: https://book.dojoengine.org/toolchain/katana/reference.html#messaging")]
     pub messaging: Option<katana_core::service::messaging::MessagingConfig>,
 
     #[command(flatten)]
diff --git a/crates/katana/src/main.rs b/crates/katana/src/main.rs
index eabb82ff6d..45da67f74b 100644
--- a/crates/katana/src/main.rs
+++ b/crates/katana/src/main.rs
@@ -60,7 +60,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
                     "🚀 JSON-RPC server started: {}",
                     Style::new().red().apply_to(format!("http://{addr}"))
                 ),
-                format!("{}", account_class_hash),
+                format!("{:#064x}", account_class_hash),
             );
         }
     }
@@ -102,11 +102,11 @@ PREDEPLOYED CONTRACTS
 
 | Contract        | Fee Token
 | Address         | {}
-| Class Hash      | {}
+| Class Hash      | {:#064x}
 
 | Contract        | Universal Deployer
 | Address         | {}
-| Class Hash      | {}
+| Class Hash      | {:#064x}
 
 | Contract        | Account Contract
 | Class Hash      | {}