diff --git a/data/gui/challenges.stkgui b/data/gui/challenges.stkgui
index f4195d991..46b5f3b57 100644
--- a/data/gui/challenges.stkgui
+++ b/data/gui/challenges.stkgui
@@ -17,6 +17,6 @@
 
     </div>
         
-    <button id="back" x="20" y="-40" width="250" height="35" align="left" text="Back to main menu"/>
+    <button id="back" x="20" y="-40" height="35" align="left" text="Back to main menu"/>
 
 </stkgui>
\ No newline at end of file
diff --git a/data/gui/credits.stkgui b/data/gui/credits.stkgui
index 63a5ae804..c558872c5 100644
--- a/data/gui/credits.stkgui
+++ b/data/gui/credits.stkgui
@@ -14,6 +14,6 @@
     
     </div>
     
-    <button id="back" x="20" y="-40" width="250" height="35" align="left" text="Back to main menu"/>
+    <button id="back" x="20" y="-40" height="35" align="left" text="Back to main menu"/>
 
 </stkgui>
\ No newline at end of file