diff --git a/Changes b/Changes
index 577cfd5..efa06b7 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,8 @@
 Revision history for perl distribution Mojolicious-Plugin-OpenAPI
 
+5.06 2022-03-25T10:00:49+0900
+ - Fix incompatability with OpenAPIv2 spec regarding default "collectionFormat"
+
 5.05 2022-03-25T10:00:49+0900
  - Fix collectionFormat in header
 
diff --git a/cpanfile b/cpanfile
index c192abe..6eb691a 100644
--- a/cpanfile
+++ b/cpanfile
@@ -1,6 +1,6 @@
 # You can install this project with curl -L http://cpanmin.us | perl - https://github.com/jhthorsen/mojolicious-plugin-openapi/archive/master.tar.gz
 requires "Mojolicious"     => "9.00";
-requires "JSON::Validator" => "5.08";
+requires "JSON::Validator" => "5.09";
 
 recommends "Text::Markdown" => "1.0.31";
 
diff --git a/t/v2-headers.t b/t/v2-headers.t
index c8521ae..ec5f1ed 100644
--- a/t/v2-headers.t
+++ b/t/v2-headers.t
@@ -25,8 +25,8 @@ $t->get_ok('/api/headers' => {'x-number' => 42.3, 'x-string' => '123'})->status_
   ->json_is('/x-number', 42.3)->header_is('what-ever', '123');
 
 $what_ever = [qw(1 2 3)];
-$t->get_ok('/api/headers' => {'x-array' => [42, 24]})->status_is(200)
-  ->json_is('/x-array', [42, 24])->header_is('what-ever', '1, 2, 3');
+$t->get_ok('/api/headers' => {'x-array' => '42,24'})->status_is(200)->json_is('/x-array', [42, 24])
+  ->header_is('what-ever', '1, 2, 3');
 
 for my $bool (qw(true false 1 0)) {
   my $s = $bool =~ /true|1/ ? 'true' : 'false';