diff --git a/static/css/clean-blog.css b/static/css/clean-blog.css
index 0bd8bf2..89ab72a 100755
--- a/static/css/clean-blog.css
+++ b/static/css/clean-blog.css
@@ -40,6 +40,9 @@ blockquote {
   color: #808080;
   font-style: italic;
 }
+pre {
+  background-color: transparent;
+}
 hr.small {
   max-width: 100px;
   margin: 15px auto;
diff --git a/static/css/code_blocks/darkly.css b/static/css/code_blocks/darkly.css
index b145f21..603db88 100644
--- a/static/css/code_blocks/darkly.css
+++ b/static/css/code_blocks/darkly.css
@@ -4,7 +4,7 @@
   http://sourcey.com
 */
 
-.highlight {
+pre {
   white-space: pre;
   overflow: auto;
   word-wrap: normal; /* horizontal scrolling */
diff --git a/static/css/code_blocks/monokai.css b/static/css/code_blocks/monokai.css
index 6cc658c..c6424dc 100644
--- a/static/css/code_blocks/monokai.css
+++ b/static/css/code_blocks/monokai.css
@@ -2,7 +2,7 @@
   Monokai Pygments Theme
 */
 
-.highlight {
+pre {
   white-space: pre;
   overflow: auto;
   word-wrap: normal; /* horizontal scrolling */
diff --git a/static/css/code_blocks/tomorrow.css b/static/css/code_blocks/tomorrow.css
index a64b14d..7b4e17f 100644
--- a/static/css/code_blocks/tomorrow.css
+++ b/static/css/code_blocks/tomorrow.css
@@ -2,7 +2,7 @@
   Tomorrow Pygments Theme
 */
 
-.highlight { background: #ffffff; color: #4d4d4c }
+pre { background: #ffffff; color: #4d4d4c }
 
 .hll { background-color: #d6d6d6 }
 .c { color: #8e908c } /* Comment */
diff --git a/static/css/code_blocks/tomorrow_night.css b/static/css/code_blocks/tomorrow_night.css
index 24fbf65..ed1ff41 100644
--- a/static/css/code_blocks/tomorrow_night.css
+++ b/static/css/code_blocks/tomorrow_night.css
@@ -2,7 +2,7 @@
   Tomorrow Night Pygments Theme
 */
 
-.highlight  { background: #1d1f21; color: #c5c8c6 }
+pre  { background: #1d1f21; color: #c5c8c6 }
 
 .hll { background-color: #373b41 }
 .c { color: #969896 } /* Comment */