diff --git a/crates/aiken/src/cmd/blueprint/apply.rs b/crates/aiken/src/cmd/blueprint/apply.rs
index a7ec05fa..aaae374e 100644
--- a/crates/aiken/src/cmd/blueprint/apply.rs
+++ b/crates/aiken/src/cmd/blueprint/apply.rs
@@ -24,15 +24,16 @@ pub struct Args {
     /// For example, `182A` designates an integer of value 42. If you're unsure about the shape of
     /// the parameter, look at the schema specified in the project's blueprint (i.e.
     /// `plutus.json`), or use the `cbor.serialise` function from the Aiken standard library.
+    #[clap(value_name = "CBOR")]
     parameter: Option<String>,
 
     /// Optional path to the blueprint file to be used as input. Default to 'plutus.json' when
     /// omitted.
-    #[clap(short, long = "in", value_parser)]
+    #[clap(short, long = "in", value_parser, value_name = "FILEPATH")]
     input: Option<PathBuf>,
 
     /// Output file. Optional, print on stdout when omitted.
-    #[clap(short, long)]
+    #[clap(short, long, value_name = "FILEPATH")]
     out: Option<PathBuf>,
 
     /// Name of the validator's module within the project. Optional if there's only one validator.
diff --git a/crates/aiken/src/cmd/check.rs b/crates/aiken/src/cmd/check.rs
index 86480183..7ae9b097 100644
--- a/crates/aiken/src/cmd/check.rs
+++ b/crates/aiken/src/cmd/check.rs
@@ -30,11 +30,11 @@ pub struct Args {
     watch: bool,
 
     /// An initial seed to initialize the pseudo-random generator for property-tests.
-    #[clap(long)]
+    #[clap(long, value_name = "UINT")]
     seed: Option<u32>,
 
     /// Maximum number of successful test run for considering a property-based test valid.
-    #[clap(long, default_value_t = PropertyTest::DEFAULT_MAX_SUCCESS)]
+    #[clap(long, default_value_t = PropertyTest::DEFAULT_MAX_SUCCESS, value_name="UINT")]
     max_success: usize,
 
     /// Only run tests if they match any of these strings.
diff --git a/crates/aiken/src/cmd/tx/simulate.rs b/crates/aiken/src/cmd/tx/simulate.rs
index c0760ec9..d57a35fd 100644
--- a/crates/aiken/src/cmd/tx/simulate.rs
+++ b/crates/aiken/src/cmd/tx/simulate.rs
@@ -1,8 +1,8 @@
 use miette::IntoDiagnostic;
 use owo_colors::{OwoColorize, Stream::Stderr};
 use pallas_primitives::{
-    conway::{Redeemer, TransactionInput, TransactionOutput},
     Fragment,
+    conway::{Redeemer, TransactionInput, TransactionOutput},
 };
 use pallas_traverse::{Era, MultiEraTx};
 use std::{fmt, fs, path::PathBuf, process};
@@ -18,6 +18,7 @@ use uplc::{
 /// Simulate a transaction by evaluating it's script
 pub struct Args {
     /// A file containing cbor hex for a transaction
+    #[clap(value_name = "FILEPATH")]
     input: PathBuf,
 
     /// Toggle whether input is raw cbor or a hex string
@@ -25,21 +26,23 @@ pub struct Args {
     cbor: bool,
 
     /// A file containing cbor hex for the raw inputs
+    #[clap(value_name = "FILEPATH")]
     raw_inputs: PathBuf,
 
     /// A file containing cbor hex for the raw outputs
+    #[clap(value_name = "FILEPATH")]
     raw_outputs: PathBuf,
 
     /// Time between each slot
-    #[clap(short, long, default_value_t = 1000)]
+    #[clap(short, long, default_value_t = 1000, value_name = "MILLISECOND")]
     slot_length: u32,
 
     /// Time of shelley hardfork
-    #[clap(long, default_value_t = 1596059091000)]
+    #[clap(long, default_value_t = 1596059091000, value_name = "POSIX")]
     zero_time: u64,
 
     /// Slot number at the start of the shelley hardfork
-    #[clap(long, default_value_t = 4492800)]
+    #[clap(long, default_value_t = 4492800, value_name = "SLOT")]
     zero_slot: u64,
 }