diff --git a/C4/Members.pm b/C4/Members.pm
index f31ef8d40c..07cb08a602 100644
--- a/C4/Members.pm
+++ b/C4/Members.pm
@@ -896,7 +896,7 @@ database column.
 =cut
 
 sub get_cardnumber_length {
-    my ( $min, $max ) = ( 0, 16 ); # borrowers.cardnumber is a nullable varchar(16)
+    my ( $min, $max ) = ( 0, 32 ); # borrowers.cardnumber is a nullable varchar(20)
     $min = 1 if C4::Context->preference('BorrowerMandatoryField') =~ /cardnumber/;
     if ( my $cardnumber_length = C4::Context->preference('CardnumberLength') ) {
         # Is integer and length match
diff --git a/installer/data/mysql/atomicupdate/bug_13178_wide_cardnumber.sql b/installer/data/mysql/atomicupdate/bug_13178_wide_cardnumber.sql
new file mode 100644
index 0000000000..7f3e23b9a4
--- /dev/null
+++ b/installer/data/mysql/atomicupdate/bug_13178_wide_cardnumber.sql
@@ -0,0 +1,6 @@
+ALTER TABLE borrowers MODIFY cardnumber varchar(32);
+ALTER TABLE borrower_modifications MODIFY cardnumber varchar(32);
+ALTER TABLE deletedborrowers MODIFY cardnumber varchar(32);
+ALTER TABLE deletedborrowers MODIFY cardnumber varchar(32);
+ALTER TABLE pending_offline_operations MODIFY cardnumber varchar(32);
+ALTER TABLE tmp_holdsqueue MODIFY cardnumber varchar(32);