diff --git a/src/main/twirl/gitbucket/core/issues/issueinfo.scala.html b/src/main/twirl/gitbucket/core/issues/issueinfo.scala.html
index 06796b6..0e61892 100644
--- a/src/main/twirl/gitbucket/core/issues/issueinfo.scala.html
+++ b/src/main/twirl/gitbucket/core/issues/issueinfo.scala.html
@@ -74,7 +74,7 @@
 <span id="label-milestone">
   @issue.flatMap(_.milestoneId).map { milestoneId =>
     @milestones.collect { case (milestone, _, _) if(milestone.milestoneId == milestoneId) =>
-      <a class="strong small username" href="@helpers.url(repository)/issues?milestone=@milestone.title&state=open">@milestone.title</a>
+      <a class="strong small username" href="@helpers.url(repository)/issues?milestone=@helpers.urlEncode(milestone.title)&state=open">@milestone.title</a>
     }
   }.getOrElse {
     <span class="muted small">No milestone</span>
@@ -211,7 +211,7 @@
       $('#milestone-progress-area').empty();
     } else {
       $('#label-milestone').html($('<a class="strong small username">').text(title)
-        .attr('href', '@helpers.url(repository)/issues?milestone=' + title + '&state=open'));
+        .attr('href', '@helpers.url(repository)/issues?milestone=' + encodeURIComponent(title) + '&state=open'));
       if(progress){
         $('#milestone-progress-area').html(progress);
       }