diff --git a/History.md b/History.md
index 3a4f558..780a038 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,9 @@
+0.0.5-beta / 2015-12
+=======================
+
+  * Added fork option
+  * Added accountKey and privateKey options
+
 0.0.4-beta / 2015-12-13
 =======================
 
diff --git a/lib/cli.js b/lib/cli.js
index a287dce..a31c0ad 100644
--- a/lib/cli.js
+++ b/lib/cli.js
@@ -14,6 +14,7 @@ app
   .option('-c, --cert <path>', 'path to save your certificate (cert.pem)')
   .option('-k, --key <path>', 'path to save your private key (privkey.pem)')
   .option('-i, --ca <path>', 'path to save issuer certificate (cacert.pem)')
+  .option('-a, --account <path>', 'path of the account key (optional)')
   .option('--pfx <path>', 'path to save PKCS#12 certificate (optional)')
   .option('--password <password>', 'password for PKCS#12 certificate (optional)')
   .option('--aes', 'use AES instead of 3DES for PKCS#12')
@@ -47,6 +48,7 @@ letiny.getCert({
   certFile:app.cert || (app.pfx ? false : 'cert.pem'),
   keyFile:app.key || (app.pfx ? false : 'privkey.pem'),
   caFile:app.ca || (app.pfx ? false : 'cacert.pem'),
+  accountKey:app.account,
   pfxFile:app.pfx,
   pfxPassword:app.password,
   aes:app.aes,
diff --git a/lib/client.js b/lib/client.js
index 5a68ed8..d01a680 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -11,7 +11,7 @@ var _DEBUG, NOOP=new Function(), log=NOOP,
   mkdirp=require('mkdirp').sync, request=require('request'),
   forge=require('node-forge'), pki=forge.pki,
   cryptoUtil=require('./crypto-util'), util=require('./acme-util'),
-  fs=require('fs'), path=require('path');
+  fs=require('fs'), path=require('path'), child=require('child_process');
 
 function Acme(privateKey) {
   this.privateKey=privateKey;
@@ -131,23 +131,81 @@ function getCert(options, cb) {
     log=NOOP;
   }
 
-  makeAccountKeyPair();
+  if (options.fork && !~process.argv.indexOf('--letiny-fork')) {
+    state.child=child.fork(__filename, ['--letiny-fork']);
+    if (options.challenge) {
+      return cb(new Error('fork+challenge not supported yet'));
+    }
+    state.child.send({request:options});
+    state.child.on('message', function(msg) {
+      var res;
+      if (msg.result) {
+        res=msg.result;
+        cb(res.err ? new Error(res.err) : null, res.cert, res.key, res.ca);
+      }
+    });
+    return;
+  }
 
-  function makeAccountKeyPair() {
+  if (options.accountKey) {
+    if (options.accountKey.length>255) {
+      state.accountKeyPEM=options.accountKey;
+    } else {
+      try {
+        state.accountKeyPEM=fs.readFileSync(options.accountKey);
+      } catch(err) {
+        if (err.code==='ENOENT') {
+          makeAccountKeyPair(true);
+        } else {
+          return handleErr(err, 'Failed to load accountKey');
+        }
+      }
+      try {
+        state.accountKeyPair=cryptoUtil.importPemPrivateKey(state.accountKeyPEM);
+      } catch(err) {
+        return handleErr(err, 'Failed to parse accountKey');
+      }
+      initAcme();
+    }
+  } else {
+    makeAccountKeyPair();
+  }
+
+  function makeAccountKeyPair(save) {
     var keypair;
     log('Generating account keypair...');
     keypair=pki.rsa.generateKeyPair(2048);
-    state.accountKeyPair=cryptoUtil.importPemPrivateKey(pki.privateKeyToPem(keypair.privateKey));
+    state.accountKeyPEM=pki.privateKeyToPem(keypair.privateKey);
+    state.accountKeyPair=cryptoUtil.importPemPrivateKey(state.accountKeyPEM);
+    if (save) {
+      try {
+        fs.writeFileSync(options.accountKey, state.accountKeyPEM);
+      } catch(err) {
+        return handleErr(err, 'Failed to save accountKey');
+      }
+    }
+    initAcme();
+  }
+
+  function initAcme() {
     state.acme=new Acme(state.accountKeyPair);
     makeKeyPair();
   }
 
   function makeKeyPair() {
     var keypair;
-    log('Generating cert keypair...');
-    keypair=pki.rsa.generateKeyPair(2048);
-    state.certPrivateKeyPEM=pki.privateKeyToPem(keypair.privateKey);
-    state.certPrivateKey=cryptoUtil.importPemPrivateKey(state.certPrivateKeyPEM);
+    if (options.privateKey) {
+      state.certPrivateKeyPEM=options.privateKey;
+    } else {
+      log('Generating cert keypair...');
+      keypair=pki.rsa.generateKeyPair(2048);
+      state.certPrivateKeyPEM=pki.privateKeyToPem(keypair.privateKey);
+    }
+    try {
+      state.certPrivateKey=cryptoUtil.importPemPrivateKey(state.certPrivateKeyPEM);
+    } catch(err) {
+      return handleErr(err, 'Failed to parse privateKey');
+    }
     register();
   }
 
@@ -459,5 +517,22 @@ function parseLink(link) {
   }
 }
 
+if (~process.argv.indexOf('--letiny-fork')) {
+  process.on('message', function(msg) {
+    if (msg.request) {
+      getCert(msg.request.options, function(err, cert, key, ca) {
+        process.send({
+          result:{
+            err:err ? err.stack : null,
+            cert:cert,
+            key:key,
+            ca:ca
+          }
+        });
+      });
+    }
+  });
+}
+
 exports.getCert=getCert;
 
diff --git a/package.json b/package.json
index 602d990..12143bb 100644
--- a/package.json
+++ b/package.json
@@ -1,9 +1,9 @@
 {
   "name": "letiny",
-  "version": "0.0.4-beta",
+  "version": "0.0.5-beta",
   "description": "Tiny ACME client library and CLI",
   "author": "Anatol Sommer <anatol@anatol.at>",
-  "license": "MPL",
+  "license": "MPL-2.0",
   "repository": {
     "type": "git",
     "url": "https://github.com/anatolsommer/letiny.git"