diff --git a/src/Util/HTTPSignature.php b/src/Util/HTTPSignature.php
index d7679abd1f..68bd049855 100644
--- a/src/Util/HTTPSignature.php
+++ b/src/Util/HTTPSignature.php
@@ -761,9 +761,9 @@ class HTTPSignature
 		}
 
 		if (in_array('(expires)', $sig_block['headers']) && !empty($sig_block['expires'])) {
-			$expired = min($sig_block['expires'], $created + 300);
+			$expired = min($sig_block['expires'], $created + 3600);
 		} else {
-			$expired = $created + 300;
+			$expired = $created + 3600;
 		}
 
 		//  Check if the signed date field is in an acceptable range