diff --git a/app/javascript/mastodon/features/account/components/header.js b/app/javascript/mastodon/features/account/components/header.js
index f929f1162d..f5fce482a1 100644
--- a/app/javascript/mastodon/features/account/components/header.js
+++ b/app/javascript/mastodon/features/account/components/header.js
@@ -5,9 +5,7 @@ import emojify from '../../../emoji';
 import escapeTextContentForBrowser from 'escape-html';
 import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
 import IconButton from '../../../components/icon_button';
-import Motion from 'react-motion/lib/Motion';
-import spring from 'react-motion/lib/spring';
-import { connect } from 'react-redux';
+import Avatar from '../../../components/avatar';
 import ImmutablePureComponent from 'react-immutable-pure-component';
 
 const messages = defineMessages({
@@ -130,7 +128,6 @@ export default class Header extends ImmutablePureComponent {
     me: PropTypes.number.isRequired,
     onFollow: PropTypes.func.isRequired,
     intl: PropTypes.object.isRequired,
-    autoPlayGif: PropTypes.bool.isRequired,
   };
 
   render () {
@@ -180,9 +177,10 @@ export default class Header extends ImmutablePureComponent {
       <div className='account__header__wrapper'>
         <div className='account__header' style={{ backgroundImage: `url(${account.get('header')})` }}>
           <div>
-            <Avatar account={account} autoPlayGif={this.props.autoPlayGif} />
-
-            <span className='account__header__display-name' dangerouslySetInnerHTML={displayNameHTML} />
+            <a href={account.get('url')} target='_blank' rel='noopener'>
+              <span className='account__header__avatar'><Avatar src={account.get('avatar')} animate size={90} /></span>
+              <span className='account__header__display-name' dangerouslySetInnerHTML={displayNameHTML} />
+            </a>
             <span className='account__header__username'>@{account.get('acct')} {lockedIcon}</span>
             <div className='account__header__content' dangerouslySetInnerHTML={{ __html: emojify(text) }} />
 
diff --git a/app/javascript/styles/_mixins.scss b/app/javascript/styles/_mixins.scss
index 67d768a6c6..455062135a 100644
--- a/app/javascript/styles/_mixins.scss
+++ b/app/javascript/styles/_mixins.scss
@@ -1,5 +1,5 @@
 @mixin avatar-radius() {
-  border-radius: 4px;
+  border-radius: $ui-avatar-border-size;
   background: transparent no-repeat;
   background-position: 50%;
   background-clip: padding-box;
diff --git a/app/javascript/styles/about.scss b/app/javascript/styles/about.scss
index 3512bdcb45..7145d0092f 100644
--- a/app/javascript/styles/about.scss
+++ b/app/javascript/styles/about.scss
@@ -172,16 +172,14 @@
   text-align: center;
 
   .avatar {
-    width: 80px;
-    height: 80px;
+    @include avatar-size(80px);
     margin: 0 auto;
     margin-bottom: 15px;
 
     img {
+      @include avatar-radius();
+      @include avatar-size(80px);
       display: block;
-      width: 80px;
-      height: 80px;
-      border-radius: 48px;
     }
   }
 
diff --git a/app/javascript/styles/accounts.scss b/app/javascript/styles/accounts.scss
index 801817d80e..10f8bd2b9c 100644
--- a/app/javascript/styles/accounts.scss
+++ b/app/javascript/styles/accounts.scss
@@ -46,17 +46,16 @@
   }
 
   .avatar {
-    width: 120px;
+    @include avatar-size(120px);
     margin: 0 auto;
     margin-bottom: 15px;
     position: relative;
     z-index: 2;
 
     img {
-      width: 120px;
-      height: 120px;
+      @include avatar-radius();
+      @include avatar-size(120px);
       display: block;
-      border-radius: 120px;
     }
   }
 
@@ -283,16 +282,14 @@
     }
 
     .avatar {
-      width: 60px;
-      height: 60px;
+      @include avatar-size(60px);
       float: left;
       margin-right: 15px;
 
       img {
+        @include avatar-radius();
+        @include avatar-size(60px);
         display: block;
-        width: 60px;
-        height: 60px;
-        border-radius: 60px;
       }
     }
 
@@ -359,15 +356,14 @@
     }
 
     & > div {
+      @include avatar-size(48px);
       float: left;
       margin-right: 10px;
-      width: 48px;
-      height: 48px;
     }
 
     .avatar {
+      @include avatar-radius();
       display: block;
-      border-radius: 4px;
     }
 
     .display-name {
diff --git a/app/javascript/styles/components.scss b/app/javascript/styles/components.scss
index e1176a654c..025ef2f64b 100644
--- a/app/javascript/styles/components.scss
+++ b/app/javascript/styles/components.scss
@@ -1004,12 +1004,11 @@
 }
 
 .account__header__avatar {
-  background-size: 90px 90px;
+  @include avatar-radius();
+  @include avatar-size(90px);
   display: block;
-  height: 90px;
   margin: 0 auto 10px;
   overflow: hidden;
-  width: 90px;
 }
 
 .account-authorize {
diff --git a/app/javascript/styles/stream_entries.scss b/app/javascript/styles/stream_entries.scss
index fcec32d447..490e36faba 100644
--- a/app/javascript/styles/stream_entries.scss
+++ b/app/javascript/styles/stream_entries.scss
@@ -64,19 +64,17 @@
 
     .status__avatar {
       position: absolute;
+      @include avatar-size(48px);
       left: 14px;
       top: 14px;
-      width: 48px;
-      height: 48px;
 
       & > div {
-        width: 48px;
-        height: 48px;
+        @include avatar-size(48px);
       }
 
       img {
+        @include avatar-radius();
         display: block;
-        border-radius: 4px;
       }
     }
 
@@ -164,12 +162,11 @@
     }
 
     .avatar {
-      width: 48px;
-      height: 48px;
+      @include avatar-size(48px);
 
       img {
+        @include avatar-radius();
         display: block;
-        border-radius: 4px;
       }
     }
 
diff --git a/app/javascript/styles/variables.scss b/app/javascript/styles/variables.scss
index 8362096e1c..bf8c12bc04 100644
--- a/app/javascript/styles/variables.scss
+++ b/app/javascript/styles/variables.scss
@@ -26,3 +26,6 @@ $ui-base-color: $classic-base-color !default;             // Darkest
 $ui-primary-color: $classic-primary-color !default;       // Lighter
 $ui-secondary-color: $classic-secondary-color !default;   // Lightest
 $ui-highlight-color: $classic-highlight-color !default;   // Vibrant
+
+// Avatar border size (8% default, 100% for rounded avatars)
+$ui-avatar-border-size: 8%;