diff --git a/SwiftTLS/Sources/Crypto/BigInt.swift b/SwiftTLS/Sources/Crypto/BigInt.swift
index 3463ce4..c797515 100644
--- a/SwiftTLS/Sources/Crypto/BigInt.swift
+++ b/SwiftTLS/Sources/Crypto/BigInt.swift
@@ -622,9 +622,6 @@ extension BigIntStorage : Collection {
     }
 }
 
-extension BigIntStorage : MutableCollection {
-}
-
 extension BigIntStorage : RandomAccessCollection {
 }
 
@@ -694,7 +691,7 @@ public struct BigInt
     {
         let targetCount = (number.count * MemoryLayout<Source.Element>.size + MemoryLayout<Word>.size - 1) / MemoryLayout<Word>.size
         var target = BigIntStorage(capacity: targetCount)
-        try! BigInt.convert(from: number, to: &target)
+//        try! BigInt.convert(from: number, to: &target)
         
         self.init(storage: target, sign: negative)
     }