diff --git a/docs/call reference.md b/docs/call reference.md
index 7967da2a..9e1ba7d3 100644
--- a/docs/call reference.md	
+++ b/docs/call reference.md	
@@ -25,9 +25,9 @@
                     <span style="font-weight: normal;">
                         apply coupon for discount: 
                     </span>
-                    2E43BB0C9E0997247E30
+                    5C14671AABA040B06FDC
                 </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/?referralCode=68B3C3DE22776E5F8EFE','_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=5C14671AABA040B06FDC','_blank');">
                     click here to visit course page
                 </button>
             </div>
diff --git a/docs/cookbook.md b/docs/cookbook.md
index 011373bb..d16e133a 100644
--- a/docs/cookbook.md
+++ b/docs/cookbook.md
@@ -25,9 +25,9 @@
                     <span style="font-weight: normal;">
                         apply coupon for discount: 
                     </span>
-                    2E43BB0C9E0997247E30
+                    5C14671AABA040B06FDC
                 </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/?referralCode=68B3C3DE22776E5F8EFE','_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=5C14671AABA040B06FDC','_blank');">
                     click here to visit course page
                 </button>
             </div>
diff --git a/readme_creator/markdown input files/5_call_reference.md b/readme_creator/markdown input files/5_call_reference.md
index 321885e5..7fa1dce3 100644
--- a/readme_creator/markdown input files/5_call_reference.md	
+++ b/readme_creator/markdown input files/5_call_reference.md	
@@ -25,9 +25,9 @@
                     <span style="font-weight: normal;">
                         apply coupon for discount: 
                     </span>
-                    2E43BB0C9E0997247E30
+                    5C14671AABA040B06FDC
                 </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/?referralCode=68B3C3DE22776E5F8EFE','_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=5C14671AABA040B06FDC','_blank');">
                     click here to visit course page
                 </button>
             </div>
diff --git a/readme_creator/output/call reference.md b/readme_creator/output/call reference.md
index 7967da2a..9e1ba7d3 100644
--- a/readme_creator/output/call reference.md	
+++ b/readme_creator/output/call reference.md	
@@ -25,9 +25,9 @@
                     <span style="font-weight: normal;">
                         apply coupon for discount: 
                     </span>
-                    2E43BB0C9E0997247E30
+                    5C14671AABA040B06FDC
                 </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/?referralCode=68B3C3DE22776E5F8EFE','_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=5C14671AABA040B06FDC','_blank');">
                     click here to visit course page
                 </button>
             </div>