diff --git a/docs/cookbook.md b/docs/cookbook.md
index 5118cafa..c99da19d 100644
--- a/docs/cookbook.md
+++ b/docs/cookbook.md
@@ -25,9 +25,9 @@
                     <span style="font-weight: normal;">
                         apply coupon for discount: 
                     </span>
-                    9AF99B123C49D51EB547
+                    F988F082A3D18483B1C5
                 </div>
-                <button style="margin: 0 auto; display: block; width: 200px; height: 70px; border-radius: 14px; border: none; padding: 10px; font-size: 18px; background-color: #357296; color: white; cursor: pointer;" onclick="window.open('https://www.udemy.com/course/pysimplegui/?couponCode=9AF99B123C49D51EB547','_blank');">
+                <button style="margin: 0 auto; display: block; width: 200px; height: 70px; border-radius: 14px; border: none; padding: 10px; font-size: 18px; background-color: #357296; color: white; cursor: pointer;" onclick="window.open('https://www.udemy.com/course/pysimplegui/?couponCode=F988F082A3D18483B1C5','_blank');">
                     click here to visit course page
                 </button>
             </div>
diff --git a/docs/readme.md b/docs/readme.md
index 4922869b..046a2a64 100644
--- a/docs/readme.md
+++ b/docs/readme.md
@@ -9,8 +9,8 @@
       <img src="https://www.dropbox.com/s/6wzf3ebmj97v4zs/PySimpleGUI-GitHub-Udemy-Course.png?raw=1" width=200 alt="PySimpleGUI Udemy Course">
     </td>
     <td>
-      <h5>apply coupon for discount:<br>9AF99B123C49D51EB547</h6>
-      <a href="https://www.udemy.com/course/pysimplegui/?couponCode=9AF99B123C49D51EB547">click here to visit course page</a>
+      <h5>apply coupon for discount:<br>F988F082A3D18483B1C5</h6>
+      <a href="https://www.udemy.com/course/pysimplegui/?couponCode=F988F082A3D18483B1C5">click here to visit course page</a>
     </td>
   </tr>
 </table>
diff --git a/readme.md b/readme.md
index 4922869b..046a2a64 100644
--- a/readme.md
+++ b/readme.md
@@ -9,8 +9,8 @@
       <img src="https://www.dropbox.com/s/6wzf3ebmj97v4zs/PySimpleGUI-GitHub-Udemy-Course.png?raw=1" width=200 alt="PySimpleGUI Udemy Course">
     </td>
     <td>
-      <h5>apply coupon for discount:<br>9AF99B123C49D51EB547</h6>
-      <a href="https://www.udemy.com/course/pysimplegui/?couponCode=9AF99B123C49D51EB547">click here to visit course page</a>
+      <h5>apply coupon for discount:<br>F988F082A3D18483B1C5</h6>
+      <a href="https://www.udemy.com/course/pysimplegui/?couponCode=F988F082A3D18483B1C5">click here to visit course page</a>
     </td>
   </tr>
 </table>