diff --git a/github-markdown.css b/github-markdown.css
index 6d9c129..44e43be 100644
--- a/github-markdown.css
+++ b/github-markdown.css
@@ -389,6 +389,7 @@
 
 .markdown-body table th {
   font-weight: bold;
+  text-align: left;
 }
 
 .markdown-body table th,