diff --git a/ext/blotter/main.php b/ext/blotter/main.php
index 5a043a99..08adf4bd 100644
--- a/ext/blotter/main.php
+++ b/ext/blotter/main.php
@@ -15,9 +15,9 @@ class Blotter extends Extension
 
     public function onDatabaseUpgrade(DatabaseUpgradeEvent $event)
     {
-        global $config, $database;
+        global $database;
 
-        if ($config->get_int("blotter_version", 0) < 1) {
+        if ($this->get_version("blotter_version") < 1) {
             $database->create_table("blotter", "
                 id SCORE_AIPK,
                 entry_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
@@ -30,11 +30,11 @@ class Blotter extends Extension
                 ["text"=>"Installed the blotter extension!", "important"=>true]
             );
             log_info("blotter", "Installed tables for blotter extension.");
-            $config->set_int("blotter_version", 2);
+            $this->set_version("blotter_version", 2);
         }
-        if ($config->get_int("blotter_version") < 2) {
+        if ($this->get_version("blotter_version") < 2) {
             $database->standardise_boolean("blotter", "important");
-            $config->set_int("blotter_version", 2);
+            $this->set_version("blotter_version", 2);
         }
     }
 
diff --git a/ext/et_server/main.php b/ext/et_server/main.php
index 97c2726b..eafa942e 100644
--- a/ext/et_server/main.php
+++ b/ext/et_server/main.php
@@ -35,17 +35,16 @@ class ETServer extends Extension
 
     public function onDatabaseUpgrade(DatabaseUpgradeEvent $event)
     {
-        global $config, $database;
+        global $database;
 
         // shortcut to latest
-        if ($config->get_int("et_server_version") < 1) {
+        if ($this->get_version("et_server_version") < 1) {
             $database->create_table("registration", "
 				id SCORE_AIPK,
 				responded TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
 				data TEXT NOT NULL,
 			");
-            $config->set_int("et_server_version", 1);
-            log_info("et_server", "extension installed");
+            $this->set_version("et_server_version", 1);
         }
     }
 }
diff --git a/ext/forum/main.php b/ext/forum/main.php
index 5539e6d8..b2aac68f 100644
--- a/ext/forum/main.php
+++ b/ext/forum/main.php
@@ -18,7 +18,7 @@ class Forum extends Extension
 
         // shortcut to latest
 
-        if ($config->get_int("forum_version") < 1) {
+        if ($this->get_version("forum_version") < 1) {
             $database->create_table("forum_threads", "
 					id SCORE_AIPK,
 					sticky BOOLEAN NOT NULL DEFAULT FALSE,
@@ -47,17 +47,16 @@ class Forum extends Extension
 
             $config->set_int("forumMaxCharsPerPost", 512);
 
-            $config->set_int("forum_version", 3);
-            log_info("forum", "extension installed");
+            $this->set_version("forum_version", 3);
         }
-        if ($config->get_int("forum_version") < 2) {
+        if ($this->get_version("forum_version") < 2) {
             $database->execute("ALTER TABLE forum_threads ADD FOREIGN KEY (user_id) REFERENCES users(id) ON UPDATE CASCADE ON DELETE RESTRICT");
             $database->execute("ALTER TABLE forum_posts ADD FOREIGN KEY (user_id) REFERENCES users(id) ON UPDATE CASCADE ON DELETE RESTRICT");
-            $config->set_int("forum_version", 2);
+            $this->set_version("forum_version", 2);
         }
-        if ($config->get_int("forum_version") < 3) {
+        if ($this->get_version("forum_version") < 3) {
             $database->standardise_boolean("forum_threads", "sticky");
-            $config->set_int("forum_version", 3);
+            $this->set_version("forum_version", 3);
         }
     }
 
diff --git a/ext/pm/main.php b/ext/pm/main.php
index fb72fea5..2d0ba333 100644
--- a/ext/pm/main.php
+++ b/ext/pm/main.php
@@ -62,10 +62,10 @@ class PrivMsg extends Extension
 
     public function onDatabaseUpgrade(DatabaseUpgradeEvent $event)
     {
-        global $config, $database;
+        global $database;
 
         // shortcut to latest
-        if ($config->get_int("pm_version") < 1) {
+        if ($this->get_version("pm_version") < 1) {
             $database->create_table("private_message", "
 				id SCORE_AIPK,
 				from_id INTEGER NOT NULL,
@@ -79,26 +79,22 @@ class PrivMsg extends Extension
 				FOREIGN KEY (to_id) REFERENCES users(id) ON DELETE CASCADE
 			");
             $database->execute("CREATE INDEX private_message__to_id ON private_message(to_id)");
-            $config->set_int("pm_version", 3);
-            log_info("pm", "extension installed");
+            $this->set_version("pm_version", 3);
         }
 
-        if ($config->get_int("pm_version") < 2) {
+        if ($this->get_version("pm_version") < 2) {
             log_info("pm", "Adding foreign keys to private messages");
             $database->execute("delete from private_message where to_id not in (select id from users);");
             $database->execute("delete from private_message where from_id not in (select id from users);");
             $database->execute("ALTER TABLE private_message
 			ADD FOREIGN KEY (from_id) REFERENCES users(id) ON DELETE CASCADE,
 			ADD FOREIGN KEY (to_id) REFERENCES users(id) ON DELETE CASCADE;");
-            $config->set_int("pm_version", 2);
-            log_info("pm", "extension upgraded");
+            $this->set_version("pm_version", 2);
         }
 
-        if ($config->get_int("pm_version") < 3) {
-            log_info("pm", "Updating is_read boolean");
+        if ($this->get_version("pm_version") < 3) {
             $database->standardise_boolean("private_message", "is_read", true);
-            $config->set_int("pm_version", 3);
-            log_info("pm", "extension upgraded");
+            $this->set_version("pm_version", 3);
         }
     }
 
diff --git a/ext/upgrade/main.php b/ext/upgrade/main.php
index 0974631e..753d901d 100644
--- a/ext/upgrade/main.php
+++ b/ext/upgrade/main.php
@@ -24,7 +24,7 @@ class Upgrade extends Extension
             file_put_contents("data/index.php", "<?php\n// Silence is golden...\n");
         }
 
-        if ($config->get_int("db_version") < 1) {
+        if ($this->get_version("db_version") < 1) {
             $this->set_version("db_version", 2);
         }