diff --git a/app/styles/components/_contribution-list.scss b/app/styles/components/_contribution-list.scss
index d6c781c..a156397 100644
--- a/app/styles/components/_contribution-list.scss
+++ b/app/styles/components/_contribution-list.scss
@@ -47,11 +47,13 @@ ul.contribution-list {
       .avatars {
         display: inline-flex;
         align-items: center;
+        vertical-align: middle;
 
         img.avatar {
           margin-right: 0;
           margin-left: -0.6rem;
           border: 2px solid $item-background-color;
+          box-sizing: content-box;
           z-index: 1;
           position: relative;
 
@@ -78,6 +80,7 @@ ul.contribution-list {
           font-size: 0.8rem;
           font-weight: 500;
           border: 2px solid $item-background-color;
+          box-sizing: content-box;
           z-index: 0;
           position: relative;
         }