diff --git a/src/Elchristo/Calendar/Converter/Converter.php b/src/Elchristo/Calendar/Converter/Converter.php
index b952540..85dbad3 100644
--- a/src/Elchristo/Calendar/Converter/Converter.php
+++ b/src/Elchristo/Calendar/Converter/Converter.php
@@ -49,10 +49,18 @@ protected static function exists($name, array $convertibleEvents = [], $buildIfE
         if (isset(self::$converters[$canonicalizeName])) {
             return $canonicalizeName;
         } else if (\is_subclass_of($name, ConverterInterface::class)) {
+            // passed classname
             if ($buildIfExists === \true) {
                 self::build($name, $convertibleEvents);
             }
             return $canonicalizeName;
+        } else if (\array_key_exists($name, $convertibleEvents) && \is_array($convertibleEvents[$name])) {
+            // converter name declared in configuration
+            $classname = \current($convertibleEvents[$name]);
+            if ($buildIfExists === \true) {
+                self::build($classname, $convertibleEvents);
+            }
+            return self::canonicalizeName($classname);
         } else {
             // lookup in default namespace
             $className = __NAMESPACE__ . '\\' . \ucfirst($name) . '\\' . \ucfirst($name);
diff --git a/tests/unit/ConvertibleEventFactoryTest.php b/tests/unit/ConvertibleEventFactoryTest.php
index 9d20541..e29abe7 100644
--- a/tests/unit/ConvertibleEventFactoryTest.php
+++ b/tests/unit/ConvertibleEventFactoryTest.php
@@ -50,6 +50,7 @@ public function testCanConvertCalendarByGivenConverterName()
         $config = $this->getConfigProvider();
         $sourceBuilder = SourceBuilderFactory::create($config);
         $calendar = new unit\Stub\TestCalendar($sourceBuilder, new Collection());
+        $calendar->setConfig($config);
         $json = Converter::convert($calendar, 'json');
         $this->assertJson($json);
     }