diff --git a/crates/starknet-types-core/src/felt/mod.rs b/crates/starknet-types-core/src/felt/mod.rs
index 7974ee9..c1dc448 100644
--- a/crates/starknet-types-core/src/felt/mod.rs
+++ b/crates/starknet-types-core/src/felt/mod.rs
@@ -574,13 +574,7 @@ impl From<&BigInt> for Felt {
 
 impl From<BigInt> for Felt {
     fn from(bigint: BigInt) -> Felt {
-        let (sign, bytes) = bigint.to_bytes_le();
-        let felt = Felt::from_bytes_le_slice(&bytes);
-        if sign == Sign::Minus {
-            felt.neg()
-        } else {
-            felt
-        }
+        Self::from(&bigint)
     }
 }
 impl From<&BigUint> for Felt {
@@ -591,7 +585,7 @@ impl From<&BigUint> for Felt {
 
 impl From<BigUint> for Felt {
     fn from(biguint: BigUint) -> Felt {
-        Felt::from_bytes_le_slice(&biguint.to_bytes_le())
+        Self::from(&biguint)
     }
 }