diff --git a/src/Application/Component/GeoIpComponent.php b/src/Application/Component/GeoIpComponent.php
index ca3f2d3..1360227 100644
--- a/src/Application/Component/GeoIpComponent.php
+++ b/src/Application/Component/GeoIpComponent.php
@@ -23,7 +23,6 @@ use D3\ModCfg\Application\Model\Exception\d3_cfg_mod_exception;
 use D3\ModCfg\Application\Model\Exception\d3ShopCompatibilityAdapterException;
 use Doctrine\DBAL\DBALException;
 use OxidEsales\Eshop\Application\Component\CurrencyComponent;
-use OxidEsales\Eshop\Application\Controller\FrontendController;
 use OxidEsales\Eshop\Core\Controller\BaseController;
 use OxidEsales\Eshop\Core\Exception\DatabaseConnectionException;
 use OxidEsales\Eshop\Core\Exception\DatabaseErrorException;
@@ -61,17 +60,16 @@ class GeoIpComponent extends BaseController
             /** @var $oLocation d3geoip */
             $oLocation = oxNew(d3geoip::class);
             $oLocation->setCountryCurrency();
-            // moved to oxcmp_lang extension because here it's to late
+            // moved to oxcmp_lang extension because here it's too late
             // $oLocation->setCountryLanguage();
 
             if (!isset($oBasket)) {
-                $oBasket = $this->getSession()->getBasket();
+                $oBasket = Registry::getSession()->getBasket();
             }
 
             // call component again, if curr is registered before we changed it
             // reason: own component can added after default components only
             if ($oLocation->hasNotSetCurrency($oBasket->getBasketCurrency())) {
-                /** @var FrontendController $oActView */
                 $oActView = Registry::getConfig()->getActiveView();
                 $aComponents = $oActView->getComponents();
 
diff --git a/src/Application/Controller/Admin/d3_country_geoip.php b/src/Application/Controller/Admin/d3_country_geoip.php
index 47f750f..35be49a 100644
--- a/src/Application/Controller/Admin/d3_country_geoip.php
+++ b/src/Application/Controller/Admin/d3_country_geoip.php
@@ -41,6 +41,9 @@ class d3_country_geoip extends AdminDetailsController
 
     /**
      * @return string
+     * @throws DBALException
+     * @throws DatabaseConnectionException
+     * @throws DatabaseErrorException
      */
     public function render()
     {
@@ -245,7 +248,7 @@ class d3_country_geoip extends AdminDetailsController
         if (is_array($aConfLanguages)) {
             $i = 0;
             reset($aConfLanguages);
-            while ((list($key, $val) = each($aConfLanguages))) {
+            foreach ($aConfLanguages as $key => $val) {
                 if (is_array($aLangParams)) {
                     //skipping non active languages
                     if (false == $aLangParams[$key]['active']) {
diff --git a/src/Application/Model/d3geoip.php b/src/Application/Model/d3geoip.php
index a53ad9f..465c179 100644
--- a/src/Application/Model/d3geoip.php
+++ b/src/Application/Model/d3geoip.php
@@ -53,7 +53,7 @@ class d3geoip extends BaseModel
     /**
      * get oxcountry object by given IP address (optional)
      *
-     * @param string $sIP optional
+     * @param string|null $sIP optional
      *
      * @return Country
      * @throws d3ShopCompatibilityAdapterException
@@ -63,7 +63,7 @@ class d3geoip extends BaseModel
      * @throws DatabaseErrorException
      * @throws StandardException
      */
-    public function getUserLocationCountryObject($sIP = null)
+    public function getUserLocationCountryObject(string $sIP = null)
     {
         if (!$this->oCountry) {
             startProfile(__METHOD__);
@@ -123,25 +123,15 @@ class d3geoip extends BaseModel
         ) {
             $sIP = $this->_getModConfig()->getValue('sTestCountryIp');
         } else {
-            if(isset($_SERVER['HTTP_CF_CONNECTING_IP'])) {
-                $sIP = $_SERVER['HTTP_CF_CONNECTING_IP'];
-            } else if (isset($_SERVER['HTTP_X_REAL_IP'])) {
-                $sIP = $_SERVER['HTTP_X_REAL_IP'];
-            } else if (isset($_SERVER['HTTP_CLIENT_IP'])) {
-                $sIP = $_SERVER['HTTP_CLIENT_IP'];
-            } else if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
-                $sIP = $_SERVER['HTTP_X_FORWARDED_FOR'];
-            } else if(isset($_SERVER['HTTP_X_FORWARDED'])) {
-                $sIP = $_SERVER['HTTP_X_FORWARDED'];
-            } else if(isset($_SERVER['HTTP_FORWARDED_FOR'])) {
-                $sIP = $_SERVER['HTTP_FORWARDED_FOR'];
-            } else if(isset($_SERVER['HTTP_FORWARDED'])) {
-                $sIP = $_SERVER['HTTP_FORWARDED'];
-            } else if(isset($_SERVER['REMOTE_ADDR'])) {
-                $sIP = $_SERVER['REMOTE_ADDR'];
-            } else {
-                $sIP = 'UNKNOWN';
-            }
+            $sIP = $_SERVER['HTTP_CF_CONNECTING_IP']
+                ?? $_SERVER['HTTP_X_REAL_IP']
+                ?? $_SERVER['HTTP_CLIENT_IP']
+                ?? $_SERVER['HTTP_X_FORWARDED_FOR']
+                ?? $_SERVER['HTTP_X_FORWARDED']
+                ?? $_SERVER['HTTP_FORWARDED_FOR']
+                ?? $_SERVER['HTTP_FORWARDED']
+                ?? $_SERVER['REMOTE_ADDR']
+                ?? 'UNKNOWN';
         }
         $sIP = str_replace(' ', '', $sIP);
 
@@ -153,12 +143,12 @@ class d3geoip extends BaseModel
     /**
      * get ISO alpha 2 ID by IP address
      *
-     * @param int $sIP IP address
+     * @param string $sIP IP address
      *
      * @return string
      * @throws DatabaseConnectionException
      */
-    public function loadByIP($sIP)
+    public function loadByIP(string $sIP)
     {
         startProfile(__METHOD__);
 
@@ -196,7 +186,7 @@ class d3geoip extends BaseModel
      * @return Country
      * @throws DatabaseConnectionException
      */
-    public function getCountryObject($sISOAlpha)
+    public function getCountryObject(string $sISOAlpha)
     {
         startProfile(__METHOD__);
 
@@ -376,18 +366,18 @@ class d3geoip extends BaseModel
             && false == $this->isAdmin()
             && Registry::getUtils()->isSearchEngine() === false
             && $oCountry->getId()
-            && $this->getConfig()->isMall()
+            && Registry::getConfig()->isMall()
             && $iNewShop > -1 &&
             (
-                $iNewShop != $this->getConfig()->getShopId()
-                || strtolower($this->getConfig()->getActiveView()->getClassKey()) == 'mallstart'
+                $iNewShop != Registry::getConfig()->getShopId()
+                || strtolower(Registry::getConfig()->getActiveView()->getClassKey()) == 'mallstart'
             )
         ) {
             $oNewConf = new Config();
             $oNewConf->setShopId($iNewShop);
             $oNewConf->init();
 
-            $this->getConfig()->onShopChange();
+            Registry::getConfig()->onShopChange();
 
             if (!Registry::getSession()->getVariable('d3isSetLang')
                 && $this->_getModConfig()->getValue('blChangeLang')
@@ -502,7 +492,7 @@ class d3geoip extends BaseModel
         $aShopUrls = array();
 
         foreach ($oShoplist->arrayKeys() as $sId) {
-            $aShopUrls[$sId] = $this->getConfig()->getShopConfVar('sMallShopURL', $sId);
+            $aShopUrls[$sId] = Registry::getConfig()->getShopConfVar('sMallShopURL', $sId);
         }
 
         stopProfile(__METHOD__);
diff --git a/src/Application/views/admin/de/d3_geoip_lang.php b/src/Application/views/admin/de/d3_geoip_lang.php
index b78999e..4a09e26 100644
--- a/src/Application/views/admin/de/d3_geoip_lang.php
+++ b/src/Application/views/admin/de/d3_geoip_lang.php
@@ -68,7 +68,7 @@ $aLang = [
 
     'D3_GEOIP_UPDATE_ITEMINSTALL'                   => 'Die umfangreiche IP-Liste kann leider nicht über die '.
         'automatische Installation eingebunden werden. Bitte installieren Sie diese manuell. '.PHP_EOL.PHP_EOL.
-        'Laden Sie bitte die aktuellen CSV-Daten des Anbieters Maxmind. In "setup+doku/importCSVtoMySQL" des Modulpaketes finden Sie weitere Informationen und die erforderlichen Datenbank-Befehle, um die nötigen Daten zu generieren.'.PHP_EOL.PHP_EOL.
-        'Alternativ finden Sie die erforderlichen Daten im Installationspaket des Moduls unter "setup+doku/geoip-data_*". '.PHP_EOL.PHP_EOL.
+        'Laden Sie bitte die aktuellen CSV-Daten des Anbieters Maxmind. In "docs/importCSVtoMySQL" des Modulpaketes finden Sie weitere Informationen und die erforderlichen Datenbank-Befehle, um die nötigen Daten zu generieren.'.PHP_EOL.PHP_EOL.
+        'Alternativ finden Sie die erforderlichen Daten im Installationspaket des Moduls unter "docs/geoip-data_*". '.PHP_EOL.PHP_EOL.
         'Führen Sie die SQL-Datei(en) bitte in Ihrer Datenbank aus.',
 ];
diff --git a/src/Application/views/admin/tpl/d3_cfg_geoipset_main.tpl b/src/Application/views/admin/tpl/d3_cfg_geoipset_main.tpl
index 530068d..d76b67a 100644
--- a/src/Application/views/admin/tpl/d3_cfg_geoipset_main.tpl
+++ b/src/Application/views/admin/tpl/d3_cfg_geoipset_main.tpl
@@ -30,7 +30,7 @@ function EditThis( sID)
 function _groupExp(el) {
     var _cur = el.parentNode;
 
-    if (_cur.className == "exp") _cur.className = "";
+    if (_cur.className === "exp") _cur.className = "";
       else _cur.className = "exp";
 }
 
@@ -47,7 +47,7 @@ function showFormatSettings(sElemId, visible, blUseOldElem)
         sOldSettingElem = sElemId;
     }
 
-    if (visible == true) {
+    if (visible === true) {
         document.getElementById(sElemId).style.display = 'block';
     } else {
         document.getElementById(sElemId).style.display = 'none';
@@ -57,7 +57,7 @@ function showFormatSettings(sElemId, visible, blUseOldElem)
 -->
 </script>
 
-<style type="text/css">
+<style>
 <!--
 fieldset{
     border: 1px inset black;
@@ -104,9 +104,9 @@ td.edittext {
     <input type="hidden" name="oxid" value="[{$oxid}]">
     <input type="hidden" name="editval[d3_cfg_mod__oxid]" value="[{$oxid}]">
 
-    <table border="0" width="98%">
+    <table style="border: 0; width: 98%">
         <tr>
-            <td valign="top" class="edittext">
+            <td style="vertical-align: top" class="edittext">
 
                 [{include file="d3_cfg_mod_active.tpl"}]
 
@@ -224,9 +224,9 @@ td.edittext {
                     </div>
                 </div>
 
-                <table width="100%">
+                <table style="width: 100%">
                     <tr>
-                        <td class="edittext ext_edittext" align="left">
+                        <td class="edittext ext_edittext" style="text-align: left">
                             <span class="d3modcfg_btn icon status_ok">
                                 <input type="submit" name="save" value="[{oxmultilang ident="D3_GENERAL_GEOIP_SAVE"}]">
                                 <span></span>
diff --git a/src/Modules/Core/d3_oxshopcontrol_geoip.php b/src/Modules/Core/d3_oxshopcontrol_geoip.php
index 36a94b3..875362d 100644
--- a/src/Modules/Core/d3_oxshopcontrol_geoip.php
+++ b/src/Modules/Core/d3_oxshopcontrol_geoip.php
@@ -22,16 +22,16 @@ use OxidEsales\Eshop\Core\Registry;
 class d3_oxshopcontrol_geoip extends d3_oxshopcontrol_geoip_parent
 {
     /**
-     * @param null $sClass
-     * @param null $sFunction
-     * @param null $aParams
-     * @param null $aViewsChain
+     * @param null $controllerKey
+     * @param null $function
+     * @param null $parameters
+     * @param null $viewsChain
      */
-    public function start ($sClass = null, $sFunction = null, $aParams = null, $aViewsChain = null)
+    public function start ($controllerKey = null, $function = null, $parameters = null, $viewsChain = null)
     {
         $this->_d3AddGeoIpComponent();
 
-        parent::start($sClass, $sFunction, $aParams, $aViewsChain);
+        parent::start( $controllerKey, $function, $parameters, $viewsChain);
     }
     
     /**
diff --git a/src/Setup/d3geoip_update.php b/src/Setup/d3geoip_update.php
index 2ecbbd7..faf6dbb 100644
--- a/src/Setup/d3geoip_update.php
+++ b/src/Setup/d3geoip_update.php
@@ -16,16 +16,23 @@
 
 namespace D3\GeoIp\Setup;
 
+use D3\ModCfg\Application\Model\Exception\d3_cfg_mod_exception;
+use D3\ModCfg\Application\Model\Exception\d3ParameterNotFoundException;
+use D3\ModCfg\Application\Model\Exception\d3ShopCompatibilityAdapterException;
 use D3\ModCfg\Application\Model\Install\d3install_updatebase;
 use D3\ModCfg\Application\Model\Installwizzard\d3installdbfield;
 use D3\ModCfg\Application\Model\Installwizzard\d3installdbtable;
 use Doctrine\DBAL\DBALException;
+use Exception;
 use OxidEsales\Eshop\Application\Model\Shop;
 use OxidEsales\Eshop\Core\DatabaseProvider;
 use OxidEsales\Eshop\Core\Exception\ConnectionException;
 use OxidEsales\Eshop\Core\Exception\DatabaseConnectionException;
 use OxidEsales\Eshop\Core\Exception\DatabaseErrorException as DatabaseErrorException;
+use OxidEsales\Eshop\Core\Exception\StandardException;
 use OxidEsales\Eshop\Core\Registry;
+use OxidEsales\Facts\Facts;
+use ReflectionException;
 
 class d3geoip_update extends d3install_updatebase
 {
@@ -238,6 +245,9 @@ XJ5U0QrUFZyUHFnNnNBdnZOa3ZRVUZVOWk=
 
     /**
      * @return bool
+     * @throws DBALException
+     * @throws DatabaseConnectionException
+     * @throws DatabaseErrorException
      */
     public function checkGeoIpTableExist()
     {
@@ -246,12 +256,16 @@ XJ5U0QrUFZyUHFnNnNBdnZOa3ZRVUZVOWk=
 
     /**
      * @return bool
+     * @throws ConnectionException
+     * @throws DBALException
+     * @throws DatabaseConnectionException
+     * @throws DatabaseErrorException
      */
     public function updateGeoIpTableExist()
     {
         $blRet = false;
         if ($this->checkGeoIpTableExist()) {
-            $blRet  = $this->_addTable2('d3geoip', $this->aFields, $this->aIndizes, 'GeoIP', 'InnoDB');
+            $blRet  = $this->_addTable2('d3geoip', $this->aFields, $this->aIndizes, 'GeoIP');
         }
 
         return $blRet;
@@ -315,12 +329,13 @@ XJ5U0QrUFZyUHFnNnNBdnZOa3ZRVUZVOWk=
 	{
 		/** @var d3installdbtable $oDbTable */
 		$oDbTable = oxNew(d3installdbtable::class, $this);
-		$blRet = $oDbTable->changeTableEngine('d3geoip', 'InnoDB');
-		return $blRet;
+		return $oDbTable->changeTableEngine('d3geoip', 'InnoDB');
 	}
 
     /**
      * @return bool
+     * @throws DBALException
+     * @throws DatabaseConnectionException
      */
     public function checkGeoIpItems()
     {
@@ -328,9 +343,7 @@ XJ5U0QrUFZyUHFnNnNBdnZOa3ZRVUZVOWk=
             'D3ISO' => 'DE',
         );
 
-        $blRet = $this->_checkTableItemNotExist('d3geoip', $aWhere);
-
-        return $blRet;
+        return $this->_checkTableItemNotExist('d3geoip', $aWhere);
     }
 
     /**
@@ -369,6 +382,11 @@ XJ5U0QrUFZyUHFnNnNBdnZOa3ZRVUZVOWk=
 
     /**
      * @return bool
+     * @throws ConnectionException
+     * @throws DBALException
+     * @throws DatabaseConnectionException
+     * @throws DatabaseErrorException
+     * @throws Exception
      */
     public function updateModCfgItemExist()
     {
@@ -453,7 +471,7 @@ XJ5U0QrUFZyUHFnNnNBdnZOa3ZRVUZVOWk=
                         ),
                         array (
                             'fieldname'     => 'OXSHOPVERSION',
-                            'content'       => Registry::getConfig()->getEdition(),
+                            'content'       => oxNew(Facts::class)->getEdition(),
                             'force_update'  => true,
                             'use_quote'     => true,
                             'use_multilang' => false,
@@ -493,7 +511,12 @@ XJ5U0QrUFZyUHFnNnNBdnZOa3ZRVUZVOWk=
 
     /**
      * change default value for shop id in EE
+     *
      * @return bool
+     * @throws ConnectionException
+     * @throws DBALException
+     * @throws DatabaseConnectionException
+     * @throws DatabaseErrorException
      */
     public function checkGeoIpFields()
     {
@@ -506,7 +529,12 @@ XJ5U0QrUFZyUHFnNnNBdnZOa3ZRVUZVOWk=
 
     /**
      * change default value for shop id in EE
+     *
      * @return bool
+     * @throws ConnectionException
+     * @throws DBALException
+     * @throws DatabaseConnectionException
+     * @throws DatabaseErrorException
      */
     public function fixGeoIpFields()
     {
@@ -519,6 +547,14 @@ XJ5U0QrUFZyUHFnNnNBdnZOa3ZRVUZVOWk=
 
     /**
      * @return bool
+     * @throws DBALException
+     * @throws DatabaseConnectionException
+     * @throws DatabaseErrorException
+     * @throws d3ParameterNotFoundException
+     * @throws d3ShopCompatibilityAdapterException
+     * @throws d3_cfg_mod_exception
+     * @throws StandardException
+     * @throws ReflectionException
      */
     public function hasUnregisteredFiles()
     {
@@ -527,6 +563,13 @@ XJ5U0QrUFZyUHFnNnNBdnZOa3ZRVUZVOWk=
 
     /**
      * @return bool
+     * @throws DBALException
+     * @throws DatabaseConnectionException
+     * @throws DatabaseErrorException
+     * @throws ReflectionException
+     * @throws StandardException
+     * @throws d3ShopCompatibilityAdapterException
+     * @throws d3_cfg_mod_exception
      */
     public function showUnregisteredFiles()
     {
@@ -602,10 +645,8 @@ XJ5U0QrUFZyUHFnNnNBdnZOa3ZRVUZVOWk=
             " AND oxmodule = ".$oDb->quote($sModuleId);
 
         $aResult = $oDb->getAll($sSelect);
-        $aUserComponents = is_array($aResult) && count($aResult)
+        return is_array($aResult) && count($aResult)
             ? Registry::getConfig()->decodeValue($aResult[0]['type'], $aResult[0]['value'])
             : null;
-
-        return $aUserComponents;
     }
 }
diff --git a/src/metadata.php b/src/metadata.php
index 548e27d..2d40eba 100644
--- a/src/metadata.php
+++ b/src/metadata.php
@@ -33,7 +33,7 @@ $aModule = [
     'version'      => '4.0.4.2',
     'author'       => 'D&sup3; Data Development (Inh.: Thomas Dartsch)',
     'email'        => 'support@shopmodule.com',
-    'url'          => 'http://www.oxidmodule.com/',
+    'url'          => 'https://www.oxidmodule.com/',
     'extend'      => [
         LanguageComponent::class => d3_oxcmp_lang_geoip::class,
         ShopControl::class => d3_oxshopcontrol_geoip::class