diff --git a/CRM/Bij1migratie/CsvFile.php b/CRM/Bij1migratie/CsvFile.php
index 0eb2c3c..230a6b5 100644
--- a/CRM/Bij1migratie/CsvFile.php
+++ b/CRM/Bij1migratie/CsvFile.php
@@ -1,9 +1,9 @@
 <?php
 
-use CRM\Bij1migratie\Mapping\AirtableMapping;
-use CRM\Bij1migratie\Mapping\BetalingenMapping;
-use CRM\Bij1migratie\Mapping\ChargebacksMapping;
-use CRM\Bij1migratie\Mapping\PersonenMapping;
+use CRM_Bij1migratie_Mapping_AirtableMapping as AirtableMapping;
+use CRM_Bij1migratie_Mapping_BetalingenMapping as BetalingenMapping;
+use CRM_Bij1migratie_Mapping_ChargebacksMapping as ChargebacksMapping;
+use CRM_Bij1migratie_Mapping_PersonenMapping as PersonenMapping;
 use CRM_Bij1migratie_ExtensionUtil as E;
 
 /**
diff --git a/CRM/Bij1migratie/Exception/MappingException.php b/CRM/Bij1migratie/Exception/MappingException.php
index 7a5f206..aaab25a 100644
--- a/CRM/Bij1migratie/Exception/MappingException.php
+++ b/CRM/Bij1migratie/Exception/MappingException.php
@@ -1,7 +1,5 @@
 <?php
 
-namespace CRM\Bij1migratie\Exception;
-
-class MappingException extends \RuntimeException
+class CRM_Bij1migratie_Exception_MappingException extends RuntimeException
 {
 }
diff --git a/CRM/Bij1migratie/Mapping/AbstractMapping.php b/CRM/Bij1migratie/Mapping/AbstractMapping.php
index 3f26830..baab387 100644
--- a/CRM/Bij1migratie/Mapping/AbstractMapping.php
+++ b/CRM/Bij1migratie/Mapping/AbstractMapping.php
@@ -1,10 +1,8 @@
 <?php
 
-namespace CRM\Bij1migratie\Mapping;
+use CRM_Bij1migratie_Exception_MappingException as MappingException;
 
-use CRM\Bij1migratie\Exception\MappingException;
-
-abstract class AbstractMapping
+abstract class CRM_Bij1migratie_Mapping_AbstractMapping
 {
     abstract protected function getColumns(): array;
 
diff --git a/CRM/Bij1migratie/Mapping/AirtableMapping.php b/CRM/Bij1migratie/Mapping/AirtableMapping.php
index da7c6d3..8163b19 100644
--- a/CRM/Bij1migratie/Mapping/AirtableMapping.php
+++ b/CRM/Bij1migratie/Mapping/AirtableMapping.php
@@ -1,8 +1,6 @@
 <?php
 
-namespace CRM\Bij1migratie\Mapping;
-
-class AirtableMapping extends AbstractMapping
+class CRM_Bij1migratie_Mapping_AirtableMapping extends CRM_Bij1migratie_Mapping_AbstractMapping
 {
     public const FIELD_LIDNUMMER = 'lidnummer';
     public const FIELD_LIDSTATUS = 'lidstatus';
diff --git a/CRM/Bij1migratie/Mapping/BetalingenMapping.php b/CRM/Bij1migratie/Mapping/BetalingenMapping.php
index f963b42..838492c 100644
--- a/CRM/Bij1migratie/Mapping/BetalingenMapping.php
+++ b/CRM/Bij1migratie/Mapping/BetalingenMapping.php
@@ -1,8 +1,6 @@
 <?php
 
-namespace CRM\Bij1migratie\Mapping;
-
-class BetalingenMapping extends AbstractMapping
+class CRM_Bij1migratie_Mapping_BetalingenMapping extends CRM_Bij1migratie_Mapping_AbstractMapping
 {
     public const FIELD_TRANSACTIE_ID = 'transactie_id';
     public const FIELD_AANMAAKDATUM = 'aanmaakdatum';
diff --git a/CRM/Bij1migratie/Mapping/ChargebacksMapping.php b/CRM/Bij1migratie/Mapping/ChargebacksMapping.php
index a44c90e..a229b73 100644
--- a/CRM/Bij1migratie/Mapping/ChargebacksMapping.php
+++ b/CRM/Bij1migratie/Mapping/ChargebacksMapping.php
@@ -1,8 +1,6 @@
 <?php
 
-namespace CRM\Bij1migratie\Mapping;
-
-class ChargebacksMapping extends AbstractMapping
+class CRM_Bij1migratie_Mapping_ChargebacksMapping extends CRM_Bij1migratie_Mapping_AbstractMapping
 {
     public const FIELD_CHARGEBACK_ID = 'chargeback_id';
     public const FIELD_CHARGEBACK_DATUM = 'chargeback_datum';
diff --git a/CRM/Bij1migratie/Mapping/PersonenMapping.php b/CRM/Bij1migratie/Mapping/PersonenMapping.php
index 9c2758b..1ffdc91 100644
--- a/CRM/Bij1migratie/Mapping/PersonenMapping.php
+++ b/CRM/Bij1migratie/Mapping/PersonenMapping.php
@@ -1,8 +1,6 @@
 <?php
 
-namespace CRM\Bij1migratie\Mapping;
-
-class PersonenMapping extends AbstractMapping
+class CRM_Bij1migratie_Mapping_PersonenMapping extends CRM_Bij1migratie_Mapping_AbstractMapping
 {
     public const FIELD_MOLLIE_CUSTOMER_ID = 'mollie_customer_id';
     public const FIELD_ACHTERNAAM = 'achternaam';