diff --git a/README.md b/README.md
index 314d3cd..757090b 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ $extractor->findDates();
 $extractor->findEmails();
 $extractor->findIbans();
 $extractor->findInvoiceIds();
-$extractor->findReferenceIds();
+$extractor->findPaymentReferences();
 $extractor->findTaxNumbers();
 $extractor->findTypes();
 $extractor->findVatNumbers();
diff --git a/src/Extractor.php b/src/Extractor.php
index e09a8c7..7eabc46 100644
--- a/src/Extractor.php
+++ b/src/Extractor.php
@@ -85,13 +85,13 @@ public function findInvoiceIds()
     }
 
     /**
-     * Extracts reference IDs from the text.
+     * Extracts payment references from the text.
      *
      * @return array
      */
-    public function findReferenceIds()
+    public function findPaymentReferences()
     {
-        return (new ReferenceId($this->text, $this->locales))->handle();
+        return (new PaymentReference($this->text, $this->locales))->handle();
     }
 
     /**
diff --git a/src/ReferenceId.php b/src/PaymentReference.php
similarity index 52%
rename from src/ReferenceId.php
rename to src/PaymentReference.php
index b8b7ff2..d918ff6 100644
--- a/src/ReferenceId.php
+++ b/src/PaymentReference.php
@@ -2,6 +2,6 @@
 
 namespace einfachArchiv\Extractor;
 
-class ReferenceId extends Extraction
+class PaymentReference extends Extraction
 {
 }
diff --git a/src/ReferenceId/De.php b/src/PaymentReference/De.php
similarity index 75%
rename from src/ReferenceId/De.php
rename to src/PaymentReference/De.php
index e5ce437..55fa03d 100644
--- a/src/ReferenceId/De.php
+++ b/src/PaymentReference/De.php
@@ -1,13 +1,13 @@
 <?php
 
-namespace einfachArchiv\Extractor\ReferenceId;
+namespace einfachArchiv\Extractor\PaymentReference;
 
 use einfachArchiv\Extractor\Extraction;
 
 class De extends Extraction
 {
     /**
-     * Extracts reference IDs from the text.
+     * Extracts payment references from the text.
      *
      * @return array
      */