diff --git a/github-markdown.css b/github-markdown.css
index 370d2d3..cecd6de 100644
--- a/github-markdown.css
+++ b/github-markdown.css
@@ -827,13 +827,11 @@
 .markdown-body img {
   max-width: 100%;
   box-sizing: initial;
-  background-color: #fff;
 }
 
 .dark .markdown-body img {
   max-width: 100%;
   box-sizing: initial;
-  background-color: #0d1117;
 }