diff --git a/doc/install.rst b/doc/install.rst
index 3af60dad5..d4457899e 100644
--- a/doc/install.rst
+++ b/doc/install.rst
@@ -77,7 +77,7 @@ Go to http://python.org . This site is a headquarter of the
 Python. Look at Left sidebar and "Quick Links", Click "Windows
 Installer" to download.
 
-.. image:: pythonorg.jpg
+.. image:: pythonorg.png
 
 .. note::
 
diff --git a/doc/pythonorg.jpg b/doc/pythonorg.png
similarity index 100%
rename from doc/pythonorg.jpg
rename to doc/pythonorg.png