diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0499ca02..52f5074a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,9 @@
-## 1.7.1
+## 1.7.3
+### Bug fixes
+- Add `hr` style
+- Fixed option is an empty string
+
+## 1.7.2
 ### Bug fixes
 - Fix sidebar click event in mobile browser.
 
diff --git a/src/index.js b/src/index.js
index a7156f13..f6adb457 100644
--- a/src/index.js
+++ b/src/index.js
@@ -25,7 +25,7 @@ const script = document.currentScript || [].slice.call(document.getElementsByTag
 if (script) {
   for (const prop in OPTIONS) {
     const val = script.getAttribute('data-' + camel2kebab(prop))
-    OPTIONS[prop] = isNil(val) ? OPTIONS[prop] : (val || true)
+    OPTIONS[prop] = isNil(val) ? OPTIONS[prop] : (typeof OPTIONS[prop] === 'string' ? val : true)
   }
   if (OPTIONS.loadSidebar === true) OPTIONS.loadSidebar = '_sidebar.md'
   if (OPTIONS.loadNavbar === true) OPTIONS.loadNavbar = '_navbar.md'
diff --git a/src/themes/basic/_layout.css b/src/themes/basic/_layout.css
index 1ee467ad..b02891d7 100644
--- a/src/themes/basic/_layout.css
+++ b/src/themes/basic/_layout.css
@@ -287,6 +287,12 @@ body.sticky {
   }
 }
 
+.markdown-section hr {
+  border: none;
+  margin: 2em 0;
+  border-bottom: 1px solid #eee;
+}
+
 .markdown-section table {
   display: block;
   width: 100%;
diff --git a/src/themes/buble.css b/src/themes/buble.css
index cd6ed3f7..f19187d5 100644
--- a/src/themes/buble.css
+++ b/src/themes/buble.css
@@ -28,7 +28,7 @@ $sidebar-width: 16em;
     padding: 0;
   }
 
-  .active {
+  li.active {
     background-color: #eee;
 
     a {