diff --git a/assets/styles/layouts/_page-register.scss b/assets/styles/layouts/_page-register.scss
index d8955fa..164d052 100644
--- a/assets/styles/layouts/_page-register.scss
+++ b/assets/styles/layouts/_page-register.scss
@@ -64,8 +64,8 @@ $body-font: 'Spectral', serif;
   &--social-button {
     display: flex;
     align-items: center;
-    padding: 5px 15px;
-    width: 250px;
+    padding: 15px 20px;
+    width: 300px;
     background: $grey-blue;
     border: none;
     border-radius: 5px;
@@ -82,6 +82,7 @@ $body-font: 'Spectral', serif;
       fill: $dark-blue;
       margin-right: 15px;
       width: 30px;
+      height: 30px;
     }
   }
   &--social-button:hover {
diff --git a/composer.json b/composer.json
index b9b024d..8d2f0bc 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,11 @@
 		"platform": {
 			"php": "7.4"
 		},
-    "sort-packages": true
+    "sort-packages": true,
+		"allow-plugins": {
+			"composer/installers": true,
+			"dealerdirect/phpcodesniffer-composer-installer": true
+		}
 	},
 	"require": {
 		"php": ">=7.4",
diff --git a/page-register.php b/page-register.php
index f111633..57c5ff9 100644
--- a/page-register.php
+++ b/page-register.php
@@ -32,6 +32,19 @@ do_action( 'pb_custom_signup_form_handler' )
 			<path fill="#B01109" d="M39.549 37.515c0 .667-.553 1.205-1.232 1.205H1.232A1.217 1.217 0 0 1 0 37.515V1.25C0 .585.553.045 1.232.045h37.083c.681 0 1.234.54 1.234 1.205v36.265z"/>
 			<path fill="#EDEDED" d="M13.648 10.504c1.44 0 2.588.444 3.444 1.332.793.848 1.19 1.93 1.19 3.245v2.786c0 1.264-.452 2.346-1.354 3.244-.903.898-1.996 1.346-3.28 1.346h-1.705v7.225H8.986V10.504h4.662zm1.77 4.622c0-.5-.155-.903-.462-1.209-.307-.305-.717-.458-1.228-.458h-1.785v6.138h1.784c.468 0 .868-.163 1.197-.49.328-.327.492-.72.492-1.179v-2.802h.002zM20.644 29.682V10.489h4.429c1.169 0 2.222.3 3.16.902.803.511 1.377 1.301 1.722 2.374.188.57.282 1.25.282 2.034 0 1.286-.35 2.317-1.05 3.092a2.976 2.976 0 0 1-1.032.75c.657.245 1.215.73 1.674 1.455.302.49.526 1.123.672 1.899.073.397.11.842.11 1.33 0 1.215-.235 2.245-.705 3.092a4.154 4.154 0 0 1-1.55 1.591c-.75.45-1.497.674-2.238.674h-5.474zm3.193-11.356h1.236c.918 0 1.534-.438 1.847-1.317.115-.327.172-.73.172-1.21 0-.795-.197-1.397-.595-1.806-.365-.377-.84-.567-1.424-.567h-1.236v4.9zm0 8.494h1.236c1 0 1.695-.505 2.081-1.515.136-.347.204-.746.204-1.195 0-1.072-.21-1.85-.626-2.342-.376-.45-.93-.672-1.66-.672h-1.235v5.724z"/>
 		</symbol>
+		<symbol id="logo-google" viewBox="0 0 50 50">
+			<path d="M 25.996094 48 C 13.3125 48 2.992188 37.683594 2.992188 25 C 2.992188 12.316406 13.3125 2 25.996094 2 C 31.742188 2 37.242188 4.128906 41.488281 7.996094 L 42.261719 8.703125 L 34.675781 16.289063 L 33.972656 15.6875 C 31.746094 13.78125 28.914063 12.730469 25.996094 12.730469 C 19.230469 12.730469 13.722656 18.234375 13.722656 25 C 13.722656 31.765625 19.230469 37.269531 25.996094 37.269531 C 30.875 37.269531 34.730469 34.777344 36.546875 30.53125 L 24.996094 30.53125 L 24.996094 20.175781 L 47.546875 20.207031 L 47.714844 21 C 48.890625 26.582031 47.949219 34.792969 43.183594 40.667969 C 39.238281 45.53125 33.457031 48 25.996094 48 Z"></path>
+		</symbol>
+		<symbol id="logo-twitter" viewBox="0 0 50 50">
+			<path d="M 50.0625 10.4375 C 48.214844 11.257813 46.234375 11.808594 44.152344 12.058594 C 46.277344 10.785156 47.910156 8.769531 48.675781 6.371094 C 46.691406 7.546875 44.484375 8.402344 42.144531 8.863281 C 40.269531 6.863281 37.597656 5.617188 34.640625 5.617188 C 28.960938 5.617188 24.355469 10.21875 24.355469 15.898438 C 24.355469 16.703125 24.449219 17.488281 24.625 18.242188 C 16.078125 17.8125 8.503906 13.71875 3.429688 7.496094 C 2.542969 9.019531 2.039063 10.785156 2.039063 12.667969 C 2.039063 16.234375 3.851563 19.382813 6.613281 21.230469 C 4.925781 21.175781 3.339844 20.710938 1.953125 19.941406 C 1.953125 19.984375 1.953125 20.027344 1.953125 20.070313 C 1.953125 25.054688 5.5 29.207031 10.199219 30.15625 C 9.339844 30.390625 8.429688 30.515625 7.492188 30.515625 C 6.828125 30.515625 6.183594 30.453125 5.554688 30.328125 C 6.867188 34.410156 10.664063 37.390625 15.160156 37.472656 C 11.644531 40.230469 7.210938 41.871094 2.390625 41.871094 C 1.558594 41.871094 0.742188 41.824219 -0.0585938 41.726563 C 4.488281 44.648438 9.894531 46.347656 15.703125 46.347656 C 34.617188 46.347656 44.960938 30.679688 44.960938 17.09375 C 44.960938 16.648438 44.949219 16.199219 44.933594 15.761719 C 46.941406 14.3125 48.683594 12.5 50.0625 10.4375 Z"></path>
+		</symbol>
+		<symbol id="logo-facebook" viewBox="0 0 50 50">
+			<path d="M25,3C12.85,3,3,12.85,3,25c0,11.03,8.125,20.137,18.712,21.728V30.831h-5.443v-5.783h5.443v-3.848 c0-6.371,3.104-9.168,8.399-9.168c2.536,0,3.877,0.188,4.512,0.274v5.048h-3.612c-2.248,0-3.033,2.131-3.033,4.533v3.161h6.588 l-0.894,5.783h-5.694v15.944C38.716,45.318,47,36.137,47,25C47,12.85,37.15,3,25,3z"></path>
+		</symbol>
+		<symbol id="logo-linkedin" viewBox="0 0 50 50">
+			<path d="M41,4H9C6.24,4,4,6.24,4,9v32c0,2.76,2.24,5,5,5h32c2.76,0,5-2.24,5-5V9C46,6.24,43.76,4,41,4z M17,20v19h-6V20H17z M11,14.47c0-1.4,1.2-2.47,3-2.47s2.93,1.07,3,2.47c0,1.4-1.12,2.53-3,2.53C12.2,17,11,15.87,11,14.47z M39,39h-6c0,0,0-9.26,0-10 c0-2-1-4-3.5-4.04h-0.08C27,24.96,26,27.02,26,29c0,0.91,0,10,0,10h-6V20h6v2.56c0,0,1.93-2.56,5.81-2.56 c3.97,0,7.19,2.73,7.19,8.26V39z"></path>
+		</symbol>
+</svg>
 	</defs>
 </svg>
 	<header class="header" role="banner">
@@ -42,10 +55,10 @@ do_action( 'pb_custom_signup_form_handler' )
 						<?php
 						$custom_logo_id = get_theme_mod( 'custom_logo' );
 						printf(
-								'<img class="header__logo--img" src="%1$s" srcset="%2$s" alt="%3$s" />',
-								wp_get_attachment_image_src( $custom_logo_id, 'logo' )[0],
-								wp_get_attachment_image_srcset( $custom_logo_id, 'large' ),
-								/* translators: %s name of network */
+							'<img class="header__logo--img" src="%1$s" srcset="%2$s" alt="%3$s" />',
+							wp_get_attachment_image_src( $custom_logo_id, 'logo' )[0],
+							wp_get_attachment_image_srcset( $custom_logo_id, 'large' ),
+							/* translators: %s name of network */
 								sprintf( __( 'Logo for %s', 'pressbooks-aldine' ), get_bloginfo( 'name', 'display' ) )
 						);
 						?>
@@ -83,19 +96,13 @@ do_action( 'pb_custom_signup_form_handler' )
 	<section class="signup--section">
 		<h2 class="signup--header-title"><?php _e( 'Or sign up with one of the following:', 'pressbooks-aldine' ); ?></h2>
 		<div class="signup--social-buttons">
-			<button class="signup--social-button google"><svg xmlns="http://www.w3.org/2000/svg" x="0px" y="0px"
-															  width="50" height="50"
-															  viewBox="0 0 50 50"><path d="M 25.996094 48 C 13.3125 48 2.992188 37.683594 2.992188 25 C 2.992188 12.316406 13.3125 2 25.996094 2 C 31.742188 2 37.242188 4.128906 41.488281 7.996094 L 42.261719 8.703125 L 34.675781 16.289063 L 33.972656 15.6875 C 31.746094 13.78125 28.914063 12.730469 25.996094 12.730469 C 19.230469 12.730469 13.722656 18.234375 13.722656 25 C 13.722656 31.765625 19.230469 37.269531 25.996094 37.269531 C 30.875 37.269531 34.730469 34.777344 36.546875 30.53125 L 24.996094 30.53125 L 24.996094 20.175781 L 47.546875 20.207031 L 47.714844 21 C 48.890625 26.582031 47.949219 34.792969 43.183594 40.667969 C 39.238281 45.53125 33.457031 48 25.996094 48 Z"></path></svg><div class="signup--social-button-name">Google</button>
-			<button class="signup--social-button twitter"><svg xmlns="http://www.w3.org/2000/svg" x="0px" y="0px"
-															   width="50" height="50"
-															   viewBox="0 0 50 50"><path d="M 50.0625 10.4375 C 48.214844 11.257813 46.234375 11.808594 44.152344 12.058594 C 46.277344 10.785156 47.910156 8.769531 48.675781 6.371094 C 46.691406 7.546875 44.484375 8.402344 42.144531 8.863281 C 40.269531 6.863281 37.597656 5.617188 34.640625 5.617188 C 28.960938 5.617188 24.355469 10.21875 24.355469 15.898438 C 24.355469 16.703125 24.449219 17.488281 24.625 18.242188 C 16.078125 17.8125 8.503906 13.71875 3.429688 7.496094 C 2.542969 9.019531 2.039063 10.785156 2.039063 12.667969 C 2.039063 16.234375 3.851563 19.382813 6.613281 21.230469 C 4.925781 21.175781 3.339844 20.710938 1.953125 19.941406 C 1.953125 19.984375 1.953125 20.027344 1.953125 20.070313 C 1.953125 25.054688 5.5 29.207031 10.199219 30.15625 C 9.339844 30.390625 8.429688 30.515625 7.492188 30.515625 C 6.828125 30.515625 6.183594 30.453125 5.554688 30.328125 C 6.867188 34.410156 10.664063 37.390625 15.160156 37.472656 C 11.644531 40.230469 7.210938 41.871094 2.390625 41.871094 C 1.558594 41.871094 0.742188 41.824219 -0.0585938 41.726563 C 4.488281 44.648438 9.894531 46.347656 15.703125 46.347656 C 34.617188 46.347656 44.960938 30.679688 44.960938 17.09375 C 44.960938 16.648438 44.949219 16.199219 44.933594 15.761719 C 46.941406 14.3125 48.683594 12.5 50.0625 10.4375 Z"></path></svg>Twitter</button>
-			<button class="signup--social-button facebook"><svg xmlns="http://www.w3.org/2000/svg" x="0px" y="0px"
-																width="50" height="50"
-																viewBox="0 0 50 50">    <path d="M25,3C12.85,3,3,12.85,3,25c0,11.03,8.125,20.137,18.712,21.728V30.831h-5.443v-5.783h5.443v-3.848 c0-6.371,3.104-9.168,8.399-9.168c2.536,0,3.877,0.188,4.512,0.274v5.048h-3.612c-2.248,0-3.033,2.131-3.033,4.533v3.161h6.588 l-0.894,5.783h-5.694v15.944C38.716,45.318,47,36.137,47,25C47,12.85,37.15,3,25,3z"></path></svg>Facebook</button>
-			<button class="signup--social-button linkedin"><svg xmlns="http://www.w3.org/2000/svg" x="0px" y="0px"
-																width="50" height="50"
-																viewBox="0 0 50 50">    <path d="M41,4H9C6.24,4,4,6.24,4,9v32c0,2.76,2.24,5,5,5h32c2.76,0,5-2.24,5-5V9C46,6.24,43.76,4,41,4z M17,20v19h-6V20H17z M11,14.47c0-1.4,1.2-2.47,3-2.47s2.93,1.07,3,2.47c0,1.4-1.12,2.53-3,2.53C12.2,17,11,15.87,11,14.47z M39,39h-6c0,0,0-9.26,0-10 c0-2-1-4-3.5-4.04h-0.08C27,24.96,26,27.02,26,29c0,0.91,0,10,0,10h-6V20h6v2.56c0,0,1.93-2.56,5.81-2.56 c3.97,0,7.19,2.73,7.19,8.26V39z"></path></svg>LinkedIn</button>
+			<button class="signup--social-button google"><svg class="logo-google"><use xlink:href="#logo-google" /></svg>Google</button>
+			<button class="signup--social-button twitter"><svg class="logo-twitter"><use xlink:href="#logo-twitter" /></svg>Twitter</button>
+			<button class="signup--social-button facebook"><svg class="logo-facebook"><use xlink:href="#logo-facebook" /></svg>Facebook</button>
+			<button class="signup--social-button linkedin"><svg class="logo-linkedin"><use xlink:href="#logo-linkedin" /></svg>LinkedIn</button>
 		</div>
 	</section>
 </div>
 <?php do_action( 'pb_custom_signup_after_wrapper' ); ?>
+</body>
+</html>