diff --git a/_includes/paper.html b/_includes/paper.html
index f374375..76c1d34 100644
--- a/_includes/paper.html
+++ b/_includes/paper.html
@@ -11,7 +11,7 @@
       </div>
       <div class="tags">
         {%- for t in post.tags -%}
-        <span class={{t}}><a href="{{site.topics_page[t]}}#{{t}}">{{t}}</a></span>
+        <span class="{{t}}"><a href="{{site.topics_page[t]}}#{{t}}">{{t}}</a></span>
         {%- endfor -%}
       </div>
       </div>