diff --git a/README.md b/README.md
index 6a70943..8666836 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ A basic example is as follows:
 
 ```puppet
 class { '::opendkim':
-  socket        => 'inet:8891@127.0.0.1',
+  socket        => 'inet:8891@[127.0.0.1]',
   trusted_hosts => ['::1','127.0.0.1','localhost'],
   keys          => [
       { 
@@ -58,7 +58,7 @@ include ::opendkim
 ```
 
 ```yaml
-opendkim::socket: 'inet:8891@127.0.0.1'
+opendkim::socket: 'inet:8891@[127.0.0.1]'
 opendkim::trusted_hosts:
     - '::1'
     - '127.0.0.1'
diff --git a/manifests/init.pp b/manifests/init.pp
index 7044f30..cffb008 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -135,7 +135,7 @@
 
   Variant[Boolean,Enum['yes','no']]                $log_why              = 'no',
   Variant[Boolean,Enum['yes','no']]                $subdomains           = 'yes',
-  String                          $socket               = 'inet:8891@127.0.0.1',
+  String                          $socket               = 'inet:8891@[127.0.0.1]',
   Pattern[/\A[0-7]{3,4}\z/]       $umask                = '0022',
   Array[Stdlib::IP::Address]      $nameservers          = [],
   Pattern[/\A[sv]{1,2}\z/]        $mode                 = 'sv',
diff --git a/templates/sysconfig/opendkim.epp b/templates/sysconfig/opendkim.epp
index 2c3abde..306a28e 100755
--- a/templates/sysconfig/opendkim.epp
+++ b/templates/sysconfig/opendkim.epp
@@ -24,7 +24,7 @@
 #SOCKET="inet:8891@localhost"
 
 # listen on 192.0.2.1 on port 12345
-#SOCKET="inet:12345@192.0.2.1"
+#SOCKET="inet:12345@[192.0.2.1]"
 
 SOCKET="<%= $socket %>"