diff --git a/src/Traits/AudioCodec.php b/src/Traits/AudioCodec.php
index b954721..4d29fa3 100644
--- a/src/Traits/AudioCodec.php
+++ b/src/Traits/AudioCodec.php
@@ -12,6 +12,9 @@ trait AudioCodec
      */
     public function AudioCodec($audioCodec)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->transcode(Transcode::audioCodec($audioCodec));
diff --git a/src/Traits/AudioFrequency.php b/src/Traits/AudioFrequency.php
index 14b7b1d..6b3c1e4 100644
--- a/src/Traits/AudioFrequency.php
+++ b/src/Traits/AudioFrequency.php
@@ -12,6 +12,9 @@ trait AudioFrequency
      */
     public function AudioFrequency($audioFrequency)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->transcode(Transcode::audioFrequency($audioFrequency));
diff --git a/src/Traits/BitRate.php b/src/Traits/BitRate.php
index 60d80ca..c9661bf 100644
--- a/src/Traits/BitRate.php
+++ b/src/Traits/BitRate.php
@@ -10,6 +10,9 @@ trait BitRate
      */
     public function BitRate($bitRate)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->bitRate($bitRate);
diff --git a/src/Traits/Crop.php b/src/Traits/Crop.php
index b7fc3b9..e4e9b8b 100644
--- a/src/Traits/Crop.php
+++ b/src/Traits/Crop.php
@@ -14,6 +14,9 @@ trait Crop
      */
     public function Crop($width, $height, $gravity = null)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         if (empty($gravity) === true) {
diff --git a/src/Traits/DPR.php b/src/Traits/DPR.php
index 7cadc4a..5009e86 100644
--- a/src/Traits/DPR.php
+++ b/src/Traits/DPR.php
@@ -12,6 +12,9 @@ trait DPR
      */
     public function DPR($dpr)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->delivery(Delivery::dpr($dpr));
diff --git a/src/Traits/Fill.php b/src/Traits/Fill.php
index 963d43c..fa27d61 100644
--- a/src/Traits/Fill.php
+++ b/src/Traits/Fill.php
@@ -14,6 +14,9 @@ trait Fill
      */
     public function Fill($width, $height, $gravity = null)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         if (empty($gravity) === true) {
diff --git a/src/Traits/Fit.php b/src/Traits/Fit.php
index 03b6c1e..063c3e5 100644
--- a/src/Traits/Fit.php
+++ b/src/Traits/Fit.php
@@ -14,6 +14,9 @@ trait Fit
      */
     public function Fit($width, $height, $aspectRatio = null)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->resize(Resize::fit($width, $height, $aspectRatio));
diff --git a/src/Traits/Flag.php b/src/Traits/Flag.php
index ecb3a9f..fdd8232 100644
--- a/src/Traits/Flag.php
+++ b/src/Traits/Flag.php
@@ -13,6 +13,9 @@ trait Flag
      */
     public function Flag($flag, ...$options)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->addFlag(TransformationFlag::$flag(...$options));
diff --git a/src/Traits/Format.php b/src/Traits/Format.php
index 8a25595..30b7ed3 100644
--- a/src/Traits/Format.php
+++ b/src/Traits/Format.php
@@ -13,6 +13,9 @@ trait Format
      */
     public function Format($format)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->delivery(Delivery::format(TransformationFormat::$format()));
diff --git a/src/Traits/KeyframeInterval.php b/src/Traits/KeyframeInterval.php
index bc94016..5688bcb 100644
--- a/src/Traits/KeyframeInterval.php
+++ b/src/Traits/KeyframeInterval.php
@@ -10,6 +10,9 @@ trait KeyframeInterval
      */
     public function KeyframeInterval($keyframeInterval)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->keyframeInterval($keyframeInterval);
diff --git a/src/Traits/Limit.php b/src/Traits/Limit.php
index f44bca7..808d9b0 100644
--- a/src/Traits/Limit.php
+++ b/src/Traits/Limit.php
@@ -14,6 +14,9 @@ trait Limit
      */
     public function Limit($width, $height, $aspectRatio = null)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->resize(Resize::limitFit($width, $height, $aspectRatio));
diff --git a/src/Traits/LimitFill.php b/src/Traits/LimitFill.php
index 27ca383..ad09095 100644
--- a/src/Traits/LimitFill.php
+++ b/src/Traits/LimitFill.php
@@ -14,6 +14,9 @@ trait LimitFill
      */
     public function LimitFill($width, $height, $gravity = null)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         if (empty($gravity) === true) {
diff --git a/src/Traits/MinimumFit.php b/src/Traits/MinimumFit.php
index fe2de77..6ca733e 100644
--- a/src/Traits/MinimumFit.php
+++ b/src/Traits/MinimumFit.php
@@ -14,6 +14,9 @@ trait MinimumFit
      */
     public function MinimumFit($width, $height, $aspectRatio = null)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->resize(Resize::minimumFit($width, $height, $aspectRatio));
diff --git a/src/Traits/Quality.php b/src/Traits/Quality.php
index c3b936d..1dd5339 100644
--- a/src/Traits/Quality.php
+++ b/src/Traits/Quality.php
@@ -10,6 +10,9 @@ trait Quality
      */
     public function Quality($quality)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->quality($quality);
diff --git a/src/Traits/Scale.php b/src/Traits/Scale.php
index adc79fc..db22ab6 100644
--- a/src/Traits/Scale.php
+++ b/src/Traits/Scale.php
@@ -14,6 +14,9 @@ trait Scale
      */
     public function Scale($width, $height, $aspectRatio = null)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->resize(Resize::scale($width, $height, $aspectRatio));
diff --git a/src/Traits/Thumb.php b/src/Traits/Thumb.php
index 03c1b4d..db0adaf 100644
--- a/src/Traits/Thumb.php
+++ b/src/Traits/Thumb.php
@@ -14,6 +14,9 @@ trait Thumb
      */
     public function Thumb($width, $height, $gravity = null)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         if (empty($gravity) === true) {
diff --git a/src/Traits/VideoCodec.php b/src/Traits/VideoCodec.php
index 7da47f0..0af7616 100644
--- a/src/Traits/VideoCodec.php
+++ b/src/Traits/VideoCodec.php
@@ -12,6 +12,9 @@ trait VideoCodec
      */
     public function VideoCodec($videoCodec)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->transcode(Transcode::videoCodec($videoCodec));
diff --git a/src/Traits/VideoSampling.php b/src/Traits/VideoSampling.php
index aaedefb..0171472 100644
--- a/src/Traits/VideoSampling.php
+++ b/src/Traits/VideoSampling.php
@@ -10,6 +10,9 @@ trait VideoSampling
      */
     public function VideoSampling($videoSampling)
     {
+        if (!$this->asset) {
+            return null;
+        }
         $clone = $this->clone();
 
         $clone->asset->videoSampling($videoSampling);