diff --git a/lib/acme-util.js b/lib/acme-util.js
deleted file mode 100644
index 9c4976f..0000000
--- a/lib/acme-util.js
+++ /dev/null
@@ -1,74 +0,0 @@
-// Copyright 2014 ISRG.  All rights reserved
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this
-// file, You can obtain one at http://mozilla.org/MPL/2.0/.
-'use strict';
-
-module.exports = {
-
-  fromStandardB64: function(x) {
-    return x.replace(/[+]/g, "-").replace(/\//g, "_").replace(/=/g,"");
-  },
-
-  toStandardB64: function(x) {
-    var b64 = x.replace(/-/g, "+").replace(/_/g, "/").replace(/=/g, "");
-
-    switch (b64.length % 4) {
-      case 2: b64 += "=="; break;
-      case 3: b64 += "="; break;
-    }
-
-    return b64;
-  },
-
-  b64enc: function(buffer) {
-    return this.fromStandardB64(buffer.toString("base64"));
-  },
-
-  b64dec: function(str) {
-    return new Buffer(this.toStandardB64(str), "base64");
-  },
-
-  isB64String: function(x) {
-    return ("string" === typeof x) && !x.match(/[^a-zA-Z0-9_-]/);
-  },
-
-  fieldsPresent: function(fields, object) {
-    for (var i in fields) {
-      if (!(fields[i] in object)) {
-        return false;
-      }
-    }
-    return true;
-  },
-
-  validSignature: function(sig) {
-    return (("object" === typeof sig) &&
-      ("alg" in sig) && ("string" === typeof sig.alg) &&
-      ("nonce" in sig) && this.isB64String(sig.nonce) &&
-      ("sig" in sig) && this.isB64String(sig.sig) &&
-      ("jwk" in sig) && this.validJWK(sig.jwk));
-  },
-
-  validJWK: function(jwk) {
-    return (("object" === typeof jwk) && ("kty" in jwk) && (
-      ((jwk.kty === "RSA")
-        && ("n" in jwk) && this.isB64String(jwk.n)
-        && ("e" in jwk) && this.isB64String(jwk.e)) ||
-      ((jwk.kty === "EC")
-        && ("crv" in jwk)
-        && ("x" in jwk) && this.isB64String(jwk.x)
-        && ("y" in jwk) && this.isB64String(jwk.y))
-    ) && !("d" in jwk));
-  },
-
-  // A simple, non-standard fingerprint for a JWK,
-  // just so that we don't have to store objects
-  keyFingerprint: function(jwk) {
-    switch (jwk.kty) {
-      case "RSA": return jwk.n;
-      case "EC": return jwk.crv + jwk.x + jwk.y;
-    }
-    throw "Unrecognized key type";
-  }
-};
diff --git a/lib/get-certificate.js b/lib/get-certificate.js
index f03c679..43e280f 100644
--- a/lib/get-certificate.js
+++ b/lib/get-certificate.js
@@ -6,9 +6,19 @@
 */
 'use strict';
 
+function _toStandardBase64(str) {
+  var b64 = str.replace(/-/g, "+").replace(/_/g, "/").replace(/=/g, "");
+
+  switch (b64.length % 4) {
+    case 2: b64 += "=="; break;
+    case 3: b64 += "="; break;
+  }
+
+  return b64;
+}
+
 module.exports.create = function (deps) {
   var request=deps.request;
-  var toStandardB64 = deps.leUtils.toStandardB64;
   //var importPemPrivateKey = deps.leCrypto.importPemPrivateKey;
   //var thumbprinter = deps.leCrypto.thumbprint;
   //var generateCsr = deps.leCrypto.generateCsr || deps.leCrypto.generateCSR;
@@ -381,7 +391,7 @@ module.exports.create = function (deps) {
   }
 
   function certBufferToPem(cert) {
-    cert=toStandardB64(cert.toString('base64'));
+    cert=_toStandardBase64(cert.toString('base64'));
     cert=cert.match(/.{1,64}/g).join('\n');
     return '-----BEGIN CERTIFICATE-----\n'+cert+'\n-----END CERTIFICATE-----';
   }
diff --git a/lib/node.js b/lib/node.js
index ad91461..4d40baf 100644
--- a/lib/node.js
+++ b/lib/node.js
@@ -7,8 +7,6 @@
 
 var request = require('request');
 var RSA = require('rsa-compat').RSA;
-var leUtils = require('./acme-util');
 
 module.exports.request = request;
-module.exports.leUtils = leUtils;
 module.exports.RSA = RSA;