diff --git a/src/Jenssegers/Mongodb/Eloquent/Model.php b/src/Jenssegers/Mongodb/Eloquent/Model.php
index 894ebe41a..d2baed730 100644
--- a/src/Jenssegers/Mongodb/Eloquent/Model.php
+++ b/src/Jenssegers/Mongodb/Eloquent/Model.php
@@ -84,7 +84,7 @@ public function fromDateTime($value)
             $value = parent::asDateTime($value);
         }
 
-        return new UTCDateTime($value->getTimestamp() * 1000);
+        return new UTCDateTime($value->format('Uv'));
     }
 
     /**
@@ -94,7 +94,7 @@ protected function asDateTime($value)
     {
         // Convert UTCDateTime instances.
         if ($value instanceof UTCDateTime) {
-            return Carbon::createFromTimestamp($value->toDateTime()->getTimestamp());
+            return Carbon::createFromTimestampMs($value->toDateTime()->format('Uv'));
         }
 
         return parent::asDateTime($value);
@@ -113,7 +113,7 @@ public function getDateFormat()
      */
     public function freshTimestamp()
     {
-        return new UTCDateTime(time() * 1000);
+        return new UTCDateTime(microtime(true) * 1000);
     }
 
     /**
diff --git a/src/Jenssegers/Mongodb/Query/Builder.php b/src/Jenssegers/Mongodb/Query/Builder.php
index c425f5165..78833fb69 100644
--- a/src/Jenssegers/Mongodb/Query/Builder.php
+++ b/src/Jenssegers/Mongodb/Query/Builder.php
@@ -924,18 +924,18 @@ protected function compileWheres()
                 if (is_array($where['value'])) {
                     array_walk_recursive($where['value'], function (&$item, $key) {
                         if ($item instanceof DateTime) {
-                            $item = new UTCDateTime($item->getTimestamp() * 1000);
+                            $item = new UTCDateTime($item->format('Uv'));
                         }
                     });
                 } else {
                     if ($where['value'] instanceof DateTime) {
-                        $where['value'] = new UTCDateTime($where['value']->getTimestamp() * 1000);
+                        $where['value'] = new UTCDateTime($where['value']->format('Uv'));
                     }
                 }
             } elseif (isset($where['values'])) {
                 array_walk_recursive($where['values'], function (&$item, $key) {
                     if ($item instanceof DateTime) {
-                        $item = new UTCDateTime($item->getTimestamp() * 1000);
+                        $item = new UTCDateTime($item->format('Uv'));
                     }
                 });
             }