diff --git a/docs/changes.xml b/docs/changes.xml
index e37c8219..8f871eb1 100644
--- a/docs/changes.xml
+++ b/docs/changes.xml
@@ -31,6 +31,12 @@ NGINX Unit updated to 1.29.0.
          date="" time=""
          packager="Nginx Packaging <nginx-packaging@f5.com>">
 
+<change type="feature">
+<para>
+support rack v3 in ruby applications.
+</para>
+</change>
+
 <change type="bugfix">
 <para>
 fix HTTP cookie parsing when the value contains an equals sign.
diff --git a/src/ruby/nxt_ruby.c b/src/ruby/nxt_ruby.c
index 1b55e7ef..cc287e0e 100644
--- a/src/ruby/nxt_ruby.c
+++ b/src/ruby/nxt_ruby.c
@@ -480,12 +480,17 @@ nxt_ruby_rack_init(nxt_ruby_rack_init_t *rack_init)
 
     rackup = rb_protect(nxt_ruby_rack_parse_script,
                         (VALUE) (uintptr_t) rack_init, &state);
-    if (nxt_slow_path(TYPE(rackup) != T_ARRAY || state != 0)) {
+
+    if (nxt_slow_path(state != 0)) {
         nxt_ruby_exception_log(NULL, NXT_LOG_ALERT,
                                "Failed to parse rack script");
         return Qnil;
     }
 
+    if (TYPE(rackup) != T_ARRAY) {
+        return rackup;
+    }
+
     if (nxt_slow_path(RARRAY_LEN(rackup) < 1)) {
         nxt_alert(rack_init->task, "Ruby: Invalid rack config file");
         return Qnil;