diff --git a/src/css/admonitions.css b/src/css/admonitions.css
index 0bd3882..3b746d0 100644
--- a/src/css/admonitions.css
+++ b/src/css/admonitions.css
@@ -25,6 +25,7 @@
 
 .doc .admonitionblock.note td.icon i {
   background-image: url(/_/img/octicons-16.svg#view-clippy);
+  background-size: 15px 15px;
 }
 
 .admonitionblock.note .content {
@@ -41,6 +42,7 @@
 
 .doc .admonitionblock.tip td.icon i {
   background-image: url(/_/img/octicons-16.svg#view-light-bulb);
+  background-size: 15px 15px;
 }
 
 .doc .admonitionblock.important .icon {
@@ -53,6 +55,7 @@
 
 .doc .admonitionblock.important td.icon i {
   background-image: url(/_/img/octicons-16.svg#view-info);
+  background-size: 15px 15px;
 }
 
 .doc .admonitionblock.caution .icon {
@@ -65,6 +68,7 @@
 
 .doc .admonitionblock.caution td.icon i {
   background-image: url(/_/img/octicons-16.svg#view-alert);
+  background-size: 15px 15px;
 }
 
 .doc .admonitionblock.warning .icon {
@@ -78,4 +82,5 @@
 
 .doc .admonitionblock.warning td.icon i {
   background-image: url(/_/img/octicons-16.svg#view-stop);
+  background-size: 15px 15px;
 }