diff --git a/crates/cli/Cargo.toml b/crates/cli/Cargo.toml
index 34219472..73284bd6 100644
--- a/crates/cli/Cargo.toml
+++ b/crates/cli/Cargo.toml
@@ -33,3 +33,4 @@ rand = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
 tokio = { workspace = true }
+ethers-core = { workspace = true }
diff --git a/crates/cli/src/args.rs b/crates/cli/src/args.rs
index a147845a..8c45cbdb 100644
--- a/crates/cli/src/args.rs
+++ b/crates/cli/src/args.rs
@@ -1,6 +1,8 @@
 use clap_cryo::Parser;
 use color_print::cstr;
 use colored::Colorize;
+use cryo_freeze::ParseError;
+use ethers_core::utils::keccak256;
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 use std::{default::Default, path::PathBuf};
@@ -263,6 +265,28 @@ pub struct Args {
 }
 
 impl Args {
+    /// pass if it's hex, convert to hex if it's not
+    pub fn convert_to_selector_strings(
+        function_signatures: Vec<String>,
+    ) -> Result<Vec<String>, ParseError> {
+        let mut selectors = Vec::new();
+        for signature in function_signatures {
+            if Args::is_hex_signature(&signature) {
+                // If it's already a hex string, use it directly
+                selectors.push(signature);
+            } else {
+                // Otherwise, hash and convert to hex
+                let hash = keccak256(&signature);
+                let selector_string = hex::encode(&hash[0..4]); // Convert to hex string
+                selectors.push(selector_string);
+            }
+        }
+        Ok(selectors)
+    }
+    // helper to check hex
+    fn is_hex_signature(signature: &str) -> bool {
+        signature.starts_with("0x") && signature.len() == 10 // 0x + 8 hex chars
+    }
     pub(crate) fn merge_with_precedence(self, other: Args) -> Self {
         let default_struct = Args::default();
 
diff --git a/crates/cli/src/main.rs b/crates/cli/src/main.rs
index 779d3b76..59d42e3b 100644
--- a/crates/cli/src/main.rs
+++ b/crates/cli/src/main.rs
@@ -15,6 +15,7 @@ use eyre::Result;
 #[allow(clippy::needless_return)]
 async fn main() -> Result<()> {
     let args = Args::parse();
+
     match run::run(args).await {
         Ok(Some(freeze_summary)) if freeze_summary.errored.is_empty() => Ok(()),
         Ok(Some(_freeze_summary)) => std::process::exit(1),
diff --git a/crates/cli/src/parse/partitions.rs b/crates/cli/src/parse/partitions.rs
index 4acaa920..48e939fd 100644
--- a/crates/cli/src/parse/partitions.rs
+++ b/crates/cli/src/parse/partitions.rs
@@ -139,10 +139,16 @@ fn parse_call_datas(
     function: &Option<Vec<String>>,
     inputs: &Option<Vec<String>>,
 ) -> Result<Option<Vec<CallDataChunk>>, ParseError> {
-    let call_datas = match (call_datas, function, inputs) {
+    let func = if let Some(function_signatures) = function {
+        let vec = function_signatures.clone();
+        Some(Args::convert_to_selector_strings(vec)?)
+    } else {
+        None
+    };
+    let call_datas = match (call_datas, &func, inputs) {
         (None, None, None) => return Ok(None),
         (Some(call_data), None, None) => hex_strings_to_binary(call_data)?,
-        (None, Some(function), None) => hex_strings_to_binary(function)?,
+        (None, Some(func), None) => hex_strings_to_binary(func)?,
         (None, Some(function), Some(inputs)) => {
             let mut call_datas = Vec::new();
             for f in function.iter() {