diff --git a/gui/wxpython/docs/wxGUI.html b/gui/wxpython/docs/wxGUI.html
index 7a30027769a..57d56a1b166 100644
--- a/gui/wxpython/docs/wxGUI.html
+++ b/gui/wxpython/docs/wxGUI.html
@@ -36,7 +36,7 @@ <h3>Layer Manager</h3>
 
 <center>
 <br>
-<img src="wxGUI_layer_manager.jpg" border="1" alt="screenshot"><br><br>
+<img src="wxGUI_layer_manager.png" border="1" alt="screenshot"><br><br>
 Figure: Layer Manager screenshot on Ubuntu
 </center>
 
diff --git a/gui/wxpython/docs/wxGUI_layer_manager.jpg b/gui/wxpython/docs/wxGUI_layer_manager.png
similarity index 100%
rename from gui/wxpython/docs/wxGUI_layer_manager.jpg
rename to gui/wxpython/docs/wxGUI_layer_manager.png