diff --git a/app/Http/Middleware/VerifyHttpSignature.php b/app/Http/Middleware/VerifyHttpSignature.php
index 85c0e7ded..edc62a1cb 100644
--- a/app/Http/Middleware/VerifyHttpSignature.php
+++ b/app/Http/Middleware/VerifyHttpSignature.php
@@ -342,8 +342,19 @@ protected function isDateValid(string $dateHeader): bool
             return false;
         }
 
-        // @phpstan-ignore-next-line
-        return $date->diffInRealSeconds(now()) <= 3600;
+        $now = now('UTC');
+    
+        // Reject if more than 1 hour in the future
+        if ($date->isAfter($now->copy()->addHour())) {
+            return false;
+        }
+    
+        // Reject if more than 1 hour in the past
+        if ($date->isBefore($now->copy()->subHour())) {
+            return false;
+        }
+
+        Return true;
     }
 
     protected function fetchActorData(string $actorUrl)
diff --git a/app/Http/Middleware/VerifyUserHttpSignature.php b/app/Http/Middleware/VerifyUserHttpSignature.php
index 5d3e28ac0..bd29346c7 100644
--- a/app/Http/Middleware/VerifyUserHttpSignature.php
+++ b/app/Http/Middleware/VerifyUserHttpSignature.php
@@ -248,8 +248,19 @@ protected function isDateValid(string $dateHeader): bool
             return false;
         }
 
-        // @phpstan-ignore-next-line
-        return $date->diffInRealSeconds(now()) <= 3600;
+        $now = now('UTC');
+    
+        // Reject if more than 1 hour in the future
+        if ($date->isAfter($now->copy()->addHour())) {
+            return false;
+        }
+    
+        // Reject if more than 1 hour in the past
+        if ($date->isBefore($now->copy()->subHour())) {
+            return false;
+        }
+
+        Return true;
     }
 
     protected function fetchActorData(string $actorUrl)