diff --git a/app/views/user/login.html.erb b/app/views/user/login.html.erb
index c8cbdbaf2..b93fe892a 100644
--- a/app/views/user/login.html.erb
+++ b/app/views/user/login.html.erb
@@ -64,10 +64,10 @@ function openid_signin(provider)
                 <%= image_tag "openid_logo.png", :alt => t('user.login.openid_providers.openid.title') %>
             </a>
             <a href="javascript: openid_signin('yahoo');" title="<%= h(t 'user.login.openid_providers.yahoo.title') %>">
-                <%= image_tag "yahoo.gif", :alt => t('user.login.openid_providers.yahoo.alt') %>
+                <%= image_tag "yahoo.png", :alt => t('user.login.openid_providers.yahoo.alt') %>
             </a>
             <a href="javascript: openid_signin('google');" title="<%= h(t 'user.login.openid_providers.google.title') %>">
-                <%= image_tag "google.gif", :alt => t('user.login.openid_providers.google.alt') %>
+                <%= image_tag "google.png", :alt => t('user.login.openid_providers.google.alt') %>
             </a><b>
             <a href="javascript: openid_signin('myopenid');" title="<%= h(t 'user.login.openid_providers.myopenid.title') %>">
                 <%= image_tag "myopenid.png", :alt => t('user.login.openid_providers.myopenid.alt') %>
diff --git a/public/images/google.gif b/public/images/google.gif
deleted file mode 100644
index ed6ba1093..000000000
Binary files a/public/images/google.gif and /dev/null differ
diff --git a/public/images/google.png b/public/images/google.png
new file mode 100644
index 000000000..c09460d64
Binary files /dev/null and b/public/images/google.png differ
diff --git a/public/images/yahoo.gif b/public/images/yahoo.gif
deleted file mode 100644
index 078f30971..000000000
Binary files a/public/images/yahoo.gif and /dev/null differ
diff --git a/public/images/yahoo.png b/public/images/yahoo.png
new file mode 100644
index 000000000..f6caa1520
Binary files /dev/null and b/public/images/yahoo.png differ