diff --git a/CHANGELOG.md b/CHANGELOG.md
index d57884f..0c15dd4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- Remove unused `hex` dependencies which broke `no_std` ([#433])
+
+[#433]: https://github.com/recmo/uint/pull/433
+
 ## [1.13.0] - 2025-02-18
 
 - Support for borsh @ 1.5 ([#416])
diff --git a/Cargo.toml b/Cargo.toml
index 01df7e5..c4a4c1b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -95,7 +95,6 @@ sqlx-core = { version = "0.8.2", optional = true }
 
 # borsh
 borsh = { version = "1.5", optional = true, default-features = false }
-hex = "0.4"
 
 [dev-dependencies]
 ruint = { path = ".", features = ["arbitrary", "proptest"] }
diff --git a/src/algorithms/gcd/matrix.rs b/src/algorithms/gcd/matrix.rs
index 3d63736..34d42d0 100644
--- a/src/algorithms/gcd/matrix.rs
+++ b/src/algorithms/gcd/matrix.rs
@@ -188,7 +188,6 @@ impl Matrix {
 
         // Compute a2
         let q = a0 / a1;
-        // dbg!(q);
         let mut a2 = a0 - q * a1;
         let mut k2 = k0 + q * k1;
         if a2 < LIMIT {
@@ -205,7 +204,6 @@ impl Matrix {
 
         // Compute a3
         let q = a1 / a2;
-        // dbg!(q);
         let mut a3 = a1 - q * a2;
         let mut k3 = k1 + q * k2;
 
@@ -222,7 +220,6 @@ impl Matrix {
             debug_assert!(a2 < a3);
             debug_assert!(a2 > 0);
             let q = a3 / a2;
-            // dbg!(q);
             a3 -= q * a2;
             k3 += q * k2;
             if a3 < LIMIT {
@@ -239,7 +236,6 @@ impl Matrix {
             debug_assert!(a2 < a3);
             debug_assert!(a2 > 0);
             let q = a3 / a2;
-            // dbg!(q);
             a3 -= q * a2;
             k3 += q * k2;
         }
diff --git a/src/bits.rs b/src/bits.rs
index f84cafe..206d7cd 100644
--- a/src/bits.rs
+++ b/src/bits.rs
@@ -819,7 +819,6 @@ mod tests {
             type U = Uint::<BITS, LIMBS>;
             proptest!(|(value: U, shift in  0..=BITS + 2)| {
                 let shifted = value.arithmetic_shr(shift);
-                // dbg!(value, shifted, shift);
                 assert_eq!(shifted.leading_ones(), match value.leading_ones() {
                     0 => 0,
                     n => min(BITS, n + shift)
diff --git a/src/lib.rs b/src/lib.rs
index 5cc19c9..a581c12 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -22,6 +22,7 @@
     clippy::cast_lossless,
 )]
 #![cfg_attr(test, allow(clippy::wildcard_imports, clippy::cognitive_complexity))]
+#![cfg_attr(not(test), warn(unused_crate_dependencies))]
 #![cfg_attr(not(feature = "std"), no_std)]
 // Unstable features
 #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
diff --git a/src/support/postgres.rs b/src/support/postgres.rs
index 5855754..429e5fa 100644
--- a/src/support/postgres.rs
+++ b/src/support/postgres.rs
@@ -445,7 +445,6 @@ mod tests {
         if ty == &Type::FLOAT8 && f64::from(value).is_infinite() {
             return;
         }
-        // dbg!(hex::encode(&serialized));
 
         // Fetch ground truth value from Postgres
         let expr = match *ty {
@@ -461,12 +460,10 @@ mod tests {
             Type::JSON | Type::JSONB => format!("'\"{value:#x}\"'::{}", ty.name()),
             _ => format!("{value}::{}", ty.name()),
         };
-        // dbg!(&expr);
         let ground_truth = {
             let mut client = client.lock().unwrap();
             get_binary(&mut client, &expr)
         };
-        // dbg!(hex::encode(&ground_truth));
 
         // Compare with ground truth, for float we allow tiny rounding error
         if ty == &Type::FLOAT4 {