diff --git a/doc/api/index.md b/doc/api/index.md
index 8c098f64d2d2d7..3f28eb7b0db414 100644
--- a/doc/api/index.md
+++ b/doc/api/index.md
@@ -8,7 +8,7 @@
 * [About this documentation](documentation.html)
 * [Usage and example](synopsis.html)
 
-<div class="line"></div>
+<hr class="line"/>
 
 * [Assertion testing](assert.html)
 * [Async hooks](async_hooks.html)
@@ -63,6 +63,6 @@
 * [Worker threads](worker_threads.html)
 * [Zlib](zlib.html)
 
-<div class="line"></div>
+<hr class="line"/>
 
 * [Code repository and issue tracker](https://github.com/nodejs/node)
diff --git a/doc/api_assets/style.css b/doc/api_assets/style.css
index a143fd88013b4c..dcd969101334fe 100644
--- a/doc/api_assets/style.css
+++ b/doc/api_assets/style.css
@@ -524,7 +524,7 @@ a code {
 
 #column2 .line {
   margin: 0 .5rem;
-  background-color: #707070;
+  border-color: #707070;
 }
 
 #column2 ul li:last-child {