diff --git a/css/ebi-css-build/_ebi_theme_settings.scss b/css/ebi-css-build/_ebi_theme_settings.scss
index 61e37ca657cc88e47d688783872d51c1942361bf..cacb03fc45b925cde47c57d9c0bb58cf35c4dfd8 100644
--- a/css/ebi-css-build/_ebi_theme_settings.scss
+++ b/css/ebi-css-build/_ebi_theme_settings.scss
@@ -33,7 +33,7 @@ $dark-gray: #8a8a8a;
 
 $body-background: $ebi-colour-white;
 $body-font-color: $ebi-colour-dark;
-$body-font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
+$body-font-family: 'Fira Sans', Helvetica, Arial, sans-serif;
 $body-font-family-serif: 'EB Garamond', 'georgia', serif;
 
 // Label tweaks
diff --git a/css/ebi-css-build/ebi-global.scss b/css/ebi-css-build/ebi-global.scss
index 4f215acdffee795504b7c4a3fea4ef03ca394c8a..ddf7516375f42e7f087a29f26334feea042520f8 100644
--- a/css/ebi-css-build/ebi-global.scss
+++ b/css/ebi-css-build/ebi-global.scss
@@ -10,9 +10,10 @@
 @import 'ebi_color_styles';
 @import 'ebi_clearable_inputs';
 @import 'embl_selector'; // EMBL Dropdown selector for .masthead-black-bar
+@import 'https://code.cdn.mozilla.net/fonts/fira.css';
 
 @mixin ebi-base-styles {
-  body h1, body h2, body h3 { font-weight: 300; }
+  body h1, body h2, body h3, body h4, body h5 { font-weight: 600; }
 
   li { word-wrap: break-word; }
 
@@ -114,7 +115,7 @@
 
   // Breadcrumbs
   .breadcrumbs { padding-top: 0.5rem; }
-  body .breadcrumbs a { color: #888; }
+  body .breadcrumbs a { color: $medium-gray; border-bottom: none; }
 
   @include ebi-code-styles;
 
diff --git a/libraries/Choices/assets/styles/scss/base.scss b/libraries/Choices/assets/styles/scss/base.scss
index de61bbf73f8c69680934cb21aa5305ff1f5390ae..3eee8ecd30577ed69429d2ecbd273b2a042088ee 100755
--- a/libraries/Choices/assets/styles/scss/base.scss
+++ b/libraries/Choices/assets/styles/scss/base.scss
@@ -29,7 +29,7 @@ html, body {
 }
 
 body {
-  font-family: "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
+  font-family: 'Fira Sans', Helvetica, Arial, "Lucida Grande", sans-serif;
   font-size: 16px;
   line-height: 1.4;
   color: #FFFFFF;