diff --git a/static/css/admonition.css b/static/css/admonition.css
index 9edddef6..9baf3459 100644
--- a/static/css/admonition.css
+++ b/static/css/admonition.css
@@ -86,18 +86,42 @@ div.tip p.admonition-title:before {
 
 div.danger p.admonition-title:before,
 div.error p.admonition-title:before {
-  content: "\f06a\00a0";
+  height: 20px;
+  width: 23px;
+  background-size: 20px 20px;
+  content: "";
+  background-repeat: no-repeat;
+  background-image: url('data:image/svg+xml; utf8, <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path fill="%23b94a48" d="M504 256c0 136.997-111.043 248-248 248S8 392.997 8 256C8 119.083 119.043 8 256 8s248 111.083 248 248zm-248 50c-25.405 0-46 20.595-46 46s20.595 46 46 46 46-20.595 46-46-20.595-46-46-46zm-43.673-165.346l7.418 136c.347 6.364 5.609 11.346 11.982 11.346h48.546c6.373 0 11.635-4.982 11.982-11.346l7.418-136c.375-6.874-5.098-12.654-11.982-12.654h-63.383c-6.884 0-12.356 5.78-11.981 12.654z"></path></svg>');
+  vertical-align: -20%;
 }
 div.warning p.admonition-title:before,
 div.caution p.admonition-title:before,
 div.attention p.admonition-title:before {
-  content: "\f071\00a0";
+  height: 20px;
+  width: 23px;
+  background-size: 20px 20px;
+  content: "";
+  background-repeat: no-repeat;
+  background-image: url('data:image/svg+xml; utf8, <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512"><path fill="%23c09853" d="M569.517 440.013C587.975 472.007 564.806 512 527.94 512H48.054c-36.937 0-59.999-40.055-41.577-71.987L246.423 23.985c18.467-32.009 64.72-31.951 83.154 0l239.94 416.028zM288 354c-25.405 0-46 20.595-46 46s20.595 46 46 46 46-20.595 46-46-20.595-46-46-46zm-43.673-165.346l7.418 136c.347 6.364 5.609 11.346 11.982 11.346h48.546c6.373 0 11.635-4.982 11.982-11.346l7.418-136c.375-6.874-5.098-12.654-11.982-12.654h-63.383c-6.884 0-12.356 5.78-11.981 12.654z"></path></svg>');
+  vertical-align: -20%;
 }
 div.important p.admonition-title:before,
 div.note p.admonition-title:before {
-  content: "\f05a\00a0";
+  height: 20px;
+  width: 23px;
+  background-size: 20px 20px;
+  content: "";
+  background-repeat: no-repeat;
+  background-image: url('data:image/svg+xml; utf8, <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path fill="%23468847" d="M256 8C119.043 8 8 119.083 8 256c0 136.997 111.043 248 248 248s248-111.003 248-248C504 119.083 392.957 8 256 8zm0 110c23.196 0 42 18.804 42 42s-18.804 42-42 42-42-18.804-42-42 18.804-42 42-42zm56 254c0 6.627-5.373 12-12 12h-88c-6.627 0-12-5.373-12-12v-24c0-6.627 5.373-12 12-12h12v-64h-12c-6.627 0-12-5.373-12-12v-24c0-6.627 5.373-12 12-12h64c6.627 0 12 5.373 12 12v100h12c6.627 0 12 5.373 12 12v24z"></path></svg>');
+  vertical-align: -20%;
 }
 div.hint p.admonition-title:before,
 div.tip p.admonition-title:before {
-  content: "\f0eb\00a0";
+  height: 20px;
+  width: 23px;
+  background-size: 20px 20px;
+  content: "";
+  background-repeat: no-repeat;
+  background-image: url('data:image/svg+xml; utf8, <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 352 512"><path fill="%233a87ad" d="M176 80c-52.94 0-96 43.06-96 96 0 8.84 7.16 16 16 16s16-7.16 16-16c0-35.3 28.72-64 64-64 8.84 0 16-7.16 16-16s-7.16-16-16-16zM96.06 459.17c0 3.15.93 6.22 2.68 8.84l24.51 36.84c2.97 4.46 7.97 7.14 13.32 7.14h78.85c5.36 0 10.36-2.68 13.32-7.14l24.51-36.84c1.74-2.62 2.67-5.7 2.68-8.84l.05-43.18H96.02l.04 43.18zM176 0C73.72 0 0 82.97 0 176c0 44.37 16.45 84.85 43.56 115.78 16.64 18.99 42.74 58.8 52.42 92.16v.06h48v-.12c-.01-4.77-.72-9.51-2.15-14.07-5.59-17.81-22.82-64.77-62.17-109.67-20.54-23.43-31.52-53.15-31.61-84.14-.2-73.64 59.67-128 127.95-128 70.58 0 128 57.42 128 128 0 30.97-11.24 60.85-31.65 84.14-39.11 44.61-56.42 91.47-62.1 109.46a47.507 47.507 0 0 0-2.22 14.3v.1h48v-.05c9.68-33.37 35.78-73.18 52.42-92.16C335.55 260.85 352 220.37 352 176 352 78.8 273.2 0 176 0z"></path></svg>');
+  vertical-align: -20%;
 }