1 files changed, 6 insertions, 4 deletions
diff --git a/src/Monolog/DateTimeImmutable.php b/src/Monolog/DateTimeImmutable.php
index 6187c5a..f1536f4 100644
--- a/src/Monolog/DateTimeImmutable.php
+++ b/src/Monolog/DateTimeImmutable.php
@@ -34,10 +34,7 @@ class DateTimeImmutable extends \DateTimeImmutable implements \JsonSerializable
         $this->useMicroseconds = $useMicroseconds;
     }
 
-    /**
-     * @return string
-     */
-    public function jsonSerialize()
+    public function jsonSerialize(): string
     {
         if ($this->useMicroseconds) {
             return $this->format('Y-m-d\TH:i:s.uP');
@@ -45,4 +42,9 @@ class DateTimeImmutable extends \DateTimeImmutable implements \JsonSerializable
 
         return $this->format('Y-m-d\TH:i:sP');
     }
+
+    public function __toString(): string
+    {
+        return $this->jsonSerialize();
+    }
 }