diff --git a/dist/remarkdown-zero.attr.css b/dist/remarkdown-zero.attr.css
index c760cb4..516b06c 100644
--- a/dist/remarkdown-zero.attr.css
+++ b/dist/remarkdown-zero.attr.css
@@ -91,7 +91,7 @@
   margin: 1.5em 0 1.5em;
 }
 
-hr {
+[data-remarkdown] hr {
   height: 1.5em;
   line-height: 1.5em;
   margin: 1.5em 0 1.5em;
diff --git a/dist/remarkdown-zero.css b/dist/remarkdown-zero.css
index d7f1008..135296f 100644
--- a/dist/remarkdown-zero.css
+++ b/dist/remarkdown-zero.css
@@ -91,7 +91,7 @@
   margin: 1.5em 0 1.5em;
 }
 
-hr {
+.remarkdown hr {
   height: 1.5em;
   line-height: 1.5em;
   margin: 1.5em 0 1.5em;
diff --git a/dist/remarkdown.attr.css b/dist/remarkdown.attr.css
index c46402a..70c4ada 100644
--- a/dist/remarkdown.attr.css
+++ b/dist/remarkdown.attr.css
@@ -91,7 +91,7 @@
   margin: 1.5em 0 1.5em;
 }
 
-hr {
+[data-remarkdown] hr {
   height: 1.5em;
   line-height: 1.5em;
   margin: 1.5em 0 1.5em;
diff --git a/dist/remarkdown.css b/dist/remarkdown.css
index 4be1968..ff06ce0 100644
--- a/dist/remarkdown.css
+++ b/dist/remarkdown.css
@@ -91,7 +91,7 @@
   margin: 1.5em 0 1.5em;
 }
 
-hr {
+.remarkdown hr {
   height: 1.5em;
   line-height: 1.5em;
   margin: 1.5em 0 1.5em;
diff --git a/src/_styles.scss b/src/_styles.scss
index 4a9b29e..b71bd3a 100644
--- a/src/_styles.scss
+++ b/src/_styles.scss
@@ -340,12 +340,14 @@
 // Options: hr-center, hr-star, hr-hyphen
 
 @mixin rmd-output-hr {
-  hr {
-    height: $__rmd-line;
-    line-height: $__rmd-line;
-    margin: __rmd-margin("hr", "top") 0 __rmd-margin("hr", "bottom");
-    border: none;
-    color: inherit;
+  @include __rmd_selector {
+    hr {
+      height: $__rmd-line;
+      line-height: $__rmd-line;
+      margin: __rmd-margin("hr", "top") 0 __rmd-margin("hr", "bottom");
+      border: none;
+      color: inherit;
+    }
   }
   @include __rmd_selector("hr-center") {
     hr {