diff --git a/README.md b/README.md
index c5c8b1e..a910146 100644
--- a/README.md
+++ b/README.md
@@ -17,3 +17,9 @@ I know this not the first vim plugin available to update a DNS-zone serial numbe
 * it lacks functionalities.
 
 It chose not to fork the original plugin but to write a new one from scratch mainly for legal purposes, but also because I did not found the code as simple as I expected.
+
+
+Configuration
+-------------
+
+You can turn off the automatic serial update by setting `let g:dnsserial_auto_update = 0` in your vimrc.
diff --git a/ftplugin/bindzone.vim b/ftplugin/bindzone.vim
index 7881921..8fb7aa6 100644
--- a/ftplugin/bindzone.vim
+++ b/ftplugin/bindzone.vim
@@ -13,7 +13,13 @@
 " limitations under the License.
 
 
-augroup dnsserial
-    autocmd!
-    autocmd BufWritePre <buffer> DNSSerialUpdate
-augroup END
+if !exists('g:dnsserial_auto_update')
+    let g:dnsserial_auto_update = 1
+endif
+
+if g:dnsserial_auto_update
+    augroup dnsserial
+        autocmd!
+        autocmd BufWritePre <buffer> DNSSerialUpdate
+    augroup END
+endif