diff --git a/Readability.js b/Readability.js
index 13fde74c..639333d3 100644
--- a/Readability.js
+++ b/Readability.js
@@ -1361,9 +1361,32 @@ Readability.prototype = {
       if (!this._isSingleImage(tmp)) return;
 
       // If noscript has previous sibling and it only contains image,
-      // replace it with noscript content.
+      // replace it with noscript content. However, in some case there
+      // is possibility that img inside noscript has lower quality
+      // than the one in previous sibling, so we will keep the src
+      // and srcset attribute from old img as data attribute for
+      // img from noscript.
       var prevElement = noscript.previousElementSibling;
       if (prevElement && this._isSingleImage(prevElement)) {
+        var prevImg = prevElement;
+        if (prevImg.tagName !== "IMG") {
+          prevImg = prevElement.getElementsByTagName("img")[0];
+        }
+
+        var newImg = tmp.getElementsByTagName("img")[0];
+        var newImgSrc = newImg.getAttribute("src");
+        var newImgSrcset = newImg.getAttribute("srcset");
+        var prevImgSrc = prevImg.getAttribute("src");
+        var prevImgSrcset = prevImg.getAttribute("srcset");
+
+        if (prevImgSrc && prevImgSrc !== newImgSrc) {
+          newImg.setAttribute("data-old-src", prevImgSrc);
+        }
+
+        if (prevImgSrcset && prevImgSrcset !== newImgSrcset) {
+          newImg.setAttribute("data-old-srcset", prevImgSrcset);
+        }
+
         noscript.parentNode.replaceChild(tmp.children[0], prevElement);
       }
     });
diff --git a/test/test-pages/citylab-1/expected.html b/test/test-pages/citylab-1/expected.html
index 0d387e3d..4b328072 100644
--- a/test/test-pages/citylab-1/expected.html
+++ b/test/test-pages/citylab-1/expected.html
@@ -12,7 +12,7 @@
             <meta itemprop="width" content="300" />
             <meta itemprop="url" content="https://cdn.citylab.com/media/img/citylab/2019/04/mr1/300.jpg?mod=1556645448" />
             <picture>
-                <source srcset="https://cdn.citylab.com/media/img/citylab/2019/04/mr1/300.jpg?mod=1556645448" media="(max-width: 575px)" /><img src="https://cdn.citylab.com/media/img/citylab/2019/04/mr1/300.jpg?mod=1556645448" alt="" /></picture>
+                <source srcset="https://cdn.citylab.com/media/img/citylab/2019/04/mr1/300.jpg?mod=1556645448" media="(max-width: 575px)" /><img src="https://cdn.citylab.com/media/img/citylab/2019/04/mr1/300.jpg?mod=1556645448" alt="" data-old-srcset="https://cdn.citylab.com/media/img/citylab/2019/04/mr1/300.jpg?mod=1556645448" /></picture>
             <figcaption>
                 <span itemprop="caption">The Moulin Rouge cabaret in Paris</span> <span itemprop="creator">Benoit Tessier/Reuters</span>
             </figcaption>
diff --git a/test/test-pages/lazy-image-1/expected.html b/test/test-pages/lazy-image-1/expected.html
index cc9061e6..24895f74 100644
--- a/test/test-pages/lazy-image-1/expected.html
+++ b/test/test-pages/lazy-image-1/expected.html
@@ -19,7 +19,7 @@
                 <div>
                     <div>
                         <div>
-                            <p><img src="https://miro.medium.com/max/3788/1*5o3M5niyi911waUrKWVZ0Q.png" width="1894" height="970" role="presentation" />
+                            <p><img src="https://miro.medium.com/max/3788/1*5o3M5niyi911waUrKWVZ0Q.png" width="1894" height="970" role="presentation" data-old-src="https://miro.medium.com/max/60/1*5o3M5niyi911waUrKWVZ0Q.png?q=20" />
                             </p>
                         </div>
                     </div>
@@ -36,7 +36,7 @@
                 <div>
                     <div>
                         <div>
-                            <p><img src="https://miro.medium.com/max/1994/1*8uOdeOfnUzTaFIY1r7oAMg.png" width="997" height="230" role="presentation" />
+                            <p><img src="https://miro.medium.com/max/1994/1*8uOdeOfnUzTaFIY1r7oAMg.png" width="997" height="230" role="presentation" data-old-src="https://miro.medium.com/max/60/1*8uOdeOfnUzTaFIY1r7oAMg.png?q=20" />
                             </p>
                         </div>
                     </div>
@@ -57,7 +57,7 @@ <h2 id="dd40"> Add arguments to Node.js </h2>
                 <div>
                     <div>
                         <div>
-                            <p><img src="https://miro.medium.com/max/1698/1*e7gjTlzi55udTXbbPeEs2A.png" width="849" height="534" role="presentation" />
+                            <p><img src="https://miro.medium.com/max/1698/1*e7gjTlzi55udTXbbPeEs2A.png" width="849" height="534" role="presentation" data-old-src="https://miro.medium.com/max/60/1*e7gjTlzi55udTXbbPeEs2A.png?q=20" />
                             </p>
                         </div>
                     </div>
@@ -71,7 +71,7 @@ <h2 id="dd40"> Add arguments to Node.js </h2>
                 <div>
                     <div>
                         <div>
-                            <p><img src="https://miro.medium.com/max/1508/1*JJkRh7JihTUo2apW_9ZXAQ.png" width="754" height="306" role="presentation" />
+                            <p><img src="https://miro.medium.com/max/1508/1*JJkRh7JihTUo2apW_9ZXAQ.png" width="754" height="306" role="presentation" data-old-src="https://miro.medium.com/max/60/1*JJkRh7JihTUo2apW_9ZXAQ.png?q=20" />
                             </p>
                         </div>
                     </div>
@@ -85,7 +85,7 @@ <h2 id="9e54"> ClinicJs </h2>
                 <div>
                     <div>
                         <div>
-                            <p><img src="https://miro.medium.com/max/5760/1*6wi5BlNNnykjZs0PufrvLQ.png" width="2880" height="1534" role="presentation" />
+                            <p><img src="https://miro.medium.com/max/5760/1*6wi5BlNNnykjZs0PufrvLQ.png" width="2880" height="1534" role="presentation" data-old-src="https://miro.medium.com/max/60/1*6wi5BlNNnykjZs0PufrvLQ.png?q=20" />
                             </p>
                         </div>
                     </div>
@@ -134,7 +134,7 @@ <h2 id="9e54"> ClinicJs </h2>
                 <div>
                     <div>
                         <div>
-                            <p><img src="https://miro.medium.com/max/1694/1*cS9IXYGfMmgxaAUlC7oqOQ.png" width="847" height="362" role="presentation" />
+                            <p><img src="https://miro.medium.com/max/1694/1*cS9IXYGfMmgxaAUlC7oqOQ.png" width="847" height="362" role="presentation" data-old-src="https://miro.medium.com/max/60/1*cS9IXYGfMmgxaAUlC7oqOQ.png?q=20" />
                             </p>
                         </div>
                     </div>
@@ -179,7 +179,7 @@ <h2 id="9e54"> ClinicJs </h2>
                 <div>
                     <div>
                         <div>
-                            <p><img src="https://miro.medium.com/max/1860/1*87KlGgfbuWP38nAaQaj3xw.png" width="930" height="523" role="presentation" />
+                            <p><img src="https://miro.medium.com/max/1860/1*87KlGgfbuWP38nAaQaj3xw.png" width="930" height="523" role="presentation" data-old-src="https://miro.medium.com/max/60/1*87KlGgfbuWP38nAaQaj3xw.png?q=20" />
                             </p>
                         </div>
                     </div>
@@ -196,7 +196,7 @@ <h2 id="9e54"> ClinicJs </h2>
                 <div>
                     <div>
                         <div>
-                            <p><img src="https://miro.medium.com/max/1690/1*kfOK60PtmWx6iP681-qRcg.png" width="845" height="362" role="presentation" />
+                            <p><img src="https://miro.medium.com/max/1690/1*kfOK60PtmWx6iP681-qRcg.png" width="845" height="362" role="presentation" data-old-src="https://miro.medium.com/max/60/1*kfOK60PtmWx6iP681-qRcg.png?q=20" />
                             </p>
                         </div>
                     </div>
diff --git a/test/test-pages/seattletimes-1/expected.html b/test/test-pages/seattletimes-1/expected.html
index b8aec321..6af8fa34 100644
--- a/test/test-pages/seattletimes-1/expected.html
+++ b/test/test-pages/seattletimes-1/expected.html
@@ -24,7 +24,7 @@
         <p> As it tries to convince people it has lower prices, Whole Foods has been very careful to maintain the reputation built on products like MSC-certified halibut. </p>
         <div>
             <figure id="image-11519494">
-                <img data-ratio="1.5" data-caption="Amazon-owned Whole Foods touted a price cut on halibut as part of an announcement recently about lower prices on hundreds of items. (Ellen M. Banner / The Seattle Times)" alt="Amazon-owned Whole Foods touted a price cut on halibut as part of an announcement recently about lower prices on hundreds of items. (Ellen M. Banner / The Seattle Times)" src="https://static.seattletimes.com/wp-content/uploads/2019/04/120109-1020x680.jpg" srcset="https://static.seattletimes.com/wp-content/uploads/2019/04/120109-300x200.jpg 300w, https://static.seattletimes.com/wp-content/uploads/2019/04/120109-768x512.jpg 768w, https://static.seattletimes.com/wp-content/uploads/2019/04/120109-1024x683.jpg 1024w, https://static.seattletimes.com/wp-content/uploads/2019/04/120109-780x520.jpg 780w, https://static.seattletimes.com/wp-content/uploads/2019/04/120109-1020x680.jpg 1020w, https://static.seattletimes.com/wp-content/uploads/2019/04/120109-1560x1040.jpg 1560w, https://static.seattletimes.com/wp-content/uploads/2019/04/120109-375x250.jpg 375w" sizes="(max-width: 767px) calc(100vw - 20px), (max-width: 1019px) calc(100vw - 30px), (max-width: 1044px) calc(100vw - 60px), 970px" data-sizes="(max-width: 767px) calc(100vw - 20px), (max-width: 1019px) calc(100vw - 30px), (max-width: 1044px) calc(100vw - 60px), 970px" />
+                <img data-ratio="1.5" data-caption="Amazon-owned Whole Foods touted a price cut on halibut as part of an announcement recently about lower prices on hundreds of items. (Ellen M. Banner / The Seattle Times)" alt="Amazon-owned Whole Foods touted a price cut on halibut as part of an announcement recently about lower prices on hundreds of items. (Ellen M. Banner / The Seattle Times)" src="https://static.seattletimes.com/wp-content/uploads/2019/04/120109-1020x680.jpg" srcset="https://static.seattletimes.com/wp-content/uploads/2019/04/120109-300x200.jpg 300w, https://static.seattletimes.com/wp-content/uploads/2019/04/120109-768x512.jpg 768w, https://static.seattletimes.com/wp-content/uploads/2019/04/120109-1024x683.jpg 1024w, https://static.seattletimes.com/wp-content/uploads/2019/04/120109-780x520.jpg 780w, https://static.seattletimes.com/wp-content/uploads/2019/04/120109-1020x680.jpg 1020w, https://static.seattletimes.com/wp-content/uploads/2019/04/120109-1560x1040.jpg 1560w, https://static.seattletimes.com/wp-content/uploads/2019/04/120109-375x250.jpg 375w" sizes="(max-width: 767px) calc(100vw - 20px), (max-width: 1019px) calc(100vw - 30px), (max-width: 1044px) calc(100vw - 60px), 970px" data-sizes="(max-width: 767px) calc(100vw - 20px), (max-width: 1019px) calc(100vw - 30px), (max-width: 1044px) calc(100vw - 60px), 970px" data-old-src="https://www.seattletimes.com/wp-content/themes/st_refresh/img/lazy-loading-14x9.png" />
                 <figcaption>
                     <span class="caption">Amazon-owned Whole Foods touted a price cut on halibut as part of an announcement recently about lower prices on hundreds of items. (Ellen M. Banner / The Seattle Times)</span>
                 </figcaption>