diff --git a/lib/dynamodb.js b/lib/dynamodb.js
index d949ae8..9e91359 100644
--- a/lib/dynamodb.js
+++ b/lib/dynamodb.js
@@ -2,8 +2,6 @@
 
 const RecordEventMock = require( './record' );
 
-const significantDigits = require( '@extra-number/significant-digits' );
-
 const constants = require( './constants' );
 
 
@@ -14,7 +12,7 @@ function calculateLength( type, value ) {
     switch( type ) {
 
         case 'N':
-            length = significantDigits( Number( value ) );
+            length = Number(value).toExponential().replace(/e[+\-0-9]*$/, '').replace(/^0\.?0*|\./, '').length;
             break;
 
         case 'BOOL':
diff --git a/package.json b/package.json
index c28e786..7dc4105 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,6 @@
   "author": "Vandium Software Inc.",
   "license": "BSD-3-Clause",
   "dependencies": {
-    "@extra-number/significant-digits": "^1.1.1",
     "clone-deep": "^4.0.1",
     "uuid": "^3.3.3",
     "vandium-utils": "^1.2.0"