diff --git a/docs/upgrades/upgrade_7.3.22-7.4.0.pl b/docs/upgrades/upgrade_7.3.22-7.4.0.pl
index 3e69036a5..6df34f852 100644
--- a/docs/upgrades/upgrade_7.3.22-7.4.0.pl
+++ b/docs/upgrades/upgrade_7.3.22-7.4.0.pl
@@ -13,6 +13,7 @@ use strict;
 use Getopt::Long;
 use WebGUI::Session;
 use WebGUI::Workflow;
+use WebGUI::Storage;
 
 my $toVersion = "7.4.0"; # make this match what version you're going to
 my $quiet; # this line required
@@ -34,11 +35,29 @@ addHttpProxyUrlPatternFilter($session);
 addCanStartThreadToCS($session);
 addPostCaptchaToCS($session);
 addFieldsToDatabaseLinks($session);
+addWikiAttachments($session);
 
 finish($session); # this line required
 
 #-------------------------------------------------
 
+sub addWikiAttachments {
+    my $session = shift;
+    print "\tAdding support for attachmetns to wikis.\n" unless ($quiet);
+    my $db = $session->db;
+    $db->write("alter table WikiMaster add column allowAttachments int not null default 0");
+    my $sth = $db->read("select storageId from WikiPage");
+    while (my ($id) = $sth->array) {
+        my $storage = WebGUI::Storage->get($session, $id);
+        if (defined $storage) {
+            $storage->delete;
+        }
+    }
+    $db->write("alter table WikiPage drop column storageId");
+}
+
+#-------------------------------------------------
+
 sub addFieldsToDatabaseLinks {
     my $session = shift;
     print "\tAdding new fields to Database Links...\n" unless ($quiet);