diff --git a/lib/gpg.js b/lib/gpg.js
index d6e97db..3a397de 100644
--- a/lib/gpg.js
+++ b/lib/gpg.js
@@ -5,7 +5,6 @@ const parser = require('./parser');
 
 function list() {
   return new Promise((resolve, reject) => {
-
     spawnGPG(['--list-keys', '--fingerprint'])
       .then(result => {
         var entries = result.content.split('\n\n');
@@ -16,7 +15,6 @@ function list() {
           const key = parser.parseKey(entry);
           keys.push(key);
         });
-  
         resolve(keys);
       })
       .catch(e => reject(e));
@@ -25,7 +23,6 @@ function list() {
 
 function info(email) {
   return new Promise((resolve, reject) => {
-
     spawnGPG(['--list-keys', '--fingerprint', email])
     .then(result => {
       const key = parser.parseKey(result.content);
@@ -45,9 +42,18 @@ function sign(message, user) {
   });
 }
 
-function verify(message) {
+function detachSign(message, user) {
   return new Promise((resolve, reject) => {
+    spawnGPG(['--detach-sign', '-u', user], message)
+    .then(result => {
+      resolve(result.content);
+    })
+    .catch(e => reject(e));
+  });
+}
 
+function verify(message) {
+  return new Promise((resolve, reject) => {
     spawnGPG(['--verify'], message)
     .then(result => {
       var data = parser.parseVerified(result.message);
@@ -85,7 +91,8 @@ module.exports = {
   list: list,
   info: info,
   sign: sign,
+  detachSign: detachSign,
   verify: verify,
   encrypt: encrypt,
   decrypt: decrypt
-};
\ No newline at end of file
+};