diff --git a/Packages/viewerbase/client/components/studyBrowser/thumbnailEntry/thumbnailEntry.styl b/Packages/viewerbase/client/components/studyBrowser/thumbnailEntry/thumbnailEntry.styl
index cc7b22178..c5a9fc4a8 100644
--- a/Packages/viewerbase/client/components/studyBrowser/thumbnailEntry/thumbnailEntry.styl
+++ b/Packages/viewerbase/client/components/studyBrowser/thumbnailEntry/thumbnailEntry.styl
@@ -42,8 +42,7 @@ $seriesCountBackgroundColor = #678696
       strong
         color: $activeColor
         font-size: 10px
-        // TODO: [design] try to find out what is the font-weight for Roboto-Black
-        font-weight: 500
+        font-weight: 900
 
       div
         background-color: $seriesCountBackgroundColor