diff --git a/changelog/fix-documents-api-regex b/changelog/fix-documents-api-regex
new file mode 100644
index 00000000000..79d7ad4daf8
--- /dev/null
+++ b/changelog/fix-documents-api-regex
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fix
+
+Fix Documents API regex to allow documents with dashes in name to be viewed.
diff --git a/includes/wc-payment-api/class-wc-payments-api-client.php b/includes/wc-payment-api/class-wc-payments-api-client.php
index d1a07e720ab..b0247f6f8af 100644
--- a/includes/wc-payment-api/class-wc-payments-api-client.php
+++ b/includes/wc-payment-api/class-wc-payments-api-client.php
@@ -1795,7 +1795,7 @@ public function get_documents_summary( array $filters = [] ) {
 	 * @throws API_Exception - If not connected or request failed.
 	 */
 	public function get_document( $document_id ) {
-		if ( ! preg_match( '/^\w+$/', $document_id ) ) {
+		if ( ! preg_match( '/^[\w-]+$/', $document_id ) ) {
 			throw new API_Exception(
 				__( 'Route param validation failed.', 'woocommerce-payments' ),
 				'wcpay_route_validation_failure',