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--- a/guide/diff_ops.html
+++ b/guide/diff_ops.html
@@ -292,7 +292,7 @@ <h2>Partial Derivatives<a class="headerlink" href="#Partial-Derivatives" title="
 <div class="math notranslate nohighlight">
 \[\mathbf{D} f [n] = f[n+1] - f[n]\]</div>
 <p>As we will see below, this is the forward finite difference approximation. This could be implemented in <strong>matrix-form</strong>, in which case it would look like this:</p>
-<center><p><img alt="6e72bdaf42704efe8c7c7fa01b0bdb77" class="no-scaled-link" src="../_images/matrix-form.png" style="width: 400px;"/></p>
+<center><p><img alt="9e72b53961dd4586bbc911d507631a5e" class="no-scaled-link" src="../_images/matrix-form.png" style="width: 400px;"/></p>
 </center><p>Or, it could be instead implemented via a for loop, in which the case of large input signals, would not require storing a large matrix:</p>
 <div class="nbinput nblast docutils container">
 <div class="prompt highlight-none notranslate"><div class="highlight"><pre><span></span>[1]:
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