diff --git a/docs/_static/css/default.css b/docs/_static/css/default.css
new file mode 100644
index 00000000..ed7cf80a
--- /dev/null
+++ b/docs/_static/css/default.css
@@ -0,0 +1,6 @@
+/* Customize logo width */
+
+.wy-side-nav-search > a img.logo {
+	width: 6em;
+	background: white;
+}
diff --git a/docs/conf.py b/docs/conf.py
index 8f972ae1..12ae5f35 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -109,6 +109,8 @@
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ['_static']
 
+html_css_files = ['css/default.css']
+
 # Custom sidebar templates, must be a dictionary that maps document names
 # to template names.
 #