diff --git a/srcd/superset/assets/src/uast/codemirror_override.less b/srcd/superset/assets/src/uast/codemirror_override.less
index b123c24f..05580d1e 100644
--- a/srcd/superset/assets/src/uast/codemirror_override.less
+++ b/srcd/superset/assets/src/uast/codemirror_override.less
@@ -12,17 +12,31 @@ http://ethanschoonover.com/solarized/img/solarized-palette.png
 
 @font-face {
   font-family: "Source Code Pro";
-  src: url("../../stylesheets/fonts/SourceCodePro-Black.ttf") format("truetype");
-  src: url("../../stylesheets/fonts/SourceCodePro-Bold.ttf") format("truetype");
-  src: url("../../stylesheets/fonts/SourceCodePro-ExtraLight.ttf")
-    format("truetype");
-  src: url("../../stylesheets/fonts/SourceCodePro-Light.ttf") format("truetype");
-  src: url("../../stylesheets/fonts/SourceCodePro-Medium.ttf")
-    format("truetype");
-  src: url("../../stylesheets/fonts/SourceCodePro-Semibold.ttf")
-    format("truetype");
-  src: url("../../stylesheets/fonts/SourceCodePro-Regular.ttf")
-    format("truetype");
+  src: url("../../stylesheets/fonts/SourceCodePro-Medium.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceCodePro-Black.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceCodePro-Bold.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceCodePro-LightIt.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceCodePro-Semibold.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceCodePro-BoldIt.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceCodePro-It.otf.woff2") format("woff2");
+  src: url("../../stylesheets/fonts/SourceCodePro-BlackIt.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceCodePro-MediumIt.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceCodePro-ExtraLight.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceCodePro-ExtraLightIt.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceCodePro-Light.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceCodePro-Regular.otf.woff2")
+    format("woff2");
 }
 
 .CodeMirror * {
diff --git a/srcd/superset/assets/src/uast/override.less b/srcd/superset/assets/src/uast/override.less
index cd25b846..e9ed3f6e 100644
--- a/srcd/superset/assets/src/uast/override.less
+++ b/srcd/superset/assets/src/uast/override.less
@@ -36,9 +36,30 @@ html {
 //## Font, line-height, and color for body text, headings, and more.
 
 @font-face {
-  font-family: "Source Sans Pro", "Helvetica Neue", Arial, sans-serif;
-  src: url("../../stylesheets/fonts/SourceSansPro-Regular.ttf")
-    format("truetype");
+  font-family: "Source Sans Pro";
+  src: url("../../stylesheets/fonts/SourceSansPro-Black.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceSansPro-BlackIt.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceSansPro-Bold.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceSansPro-BoldIt.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceSansPro-ExtraLight.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceSansPro-ExtraLightIt.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceSansPro-It.otf.woff2") format("woff2");
+  src: url("../../stylesheets/fonts/SourceSansPro-Light.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceSansPro-LightIt.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceSansPro-Semibold.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceSansPro-SemiboldIt.otf.woff2")
+    format("woff2");
+  src: url("../../stylesheets/fonts/SourceSansPro-Regular.otf.woff2")
+    format("woff2");
 }
 
 @font-family-sans-serif: "Source Sans Pro", "Helvetica Neue", Arial, sans-serif;
diff --git a/srcd/superset/assets/stylesheets/fonts/SourceCodePro-Black.otf.woff2 b/srcd/superset/assets/stylesheets/fonts/SourceCodePro-Black.otf.woff2
new file mode 100755
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deleted file mode 100755
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diff --git a/srcd/superset/assets/stylesheets/fonts/SourceCodePro-ExtraLight.otf.woff2 b/srcd/superset/assets/stylesheets/fonts/SourceCodePro-ExtraLight.otf.woff2
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deleted file mode 100755
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deleted file mode 100755
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diff --git a/srcd/superset/assets/stylesheets/fonts/SourceSansPro-ExtraLight.otf.woff2 b/srcd/superset/assets/stylesheets/fonts/SourceSansPro-ExtraLight.otf.woff2
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diff --git a/srcd/superset/assets/stylesheets/fonts/SourceSansPro-Light.otf.woff2 b/srcd/superset/assets/stylesheets/fonts/SourceSansPro-Light.otf.woff2
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index 5b75a972..00000000
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diff --git a/srcd/superset/assets/stylesheets/fonts/SourceSansPro-Regular.otf.woff2 b/srcd/superset/assets/stylesheets/fonts/SourceSansPro-Regular.otf.woff2
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index 6d0f7813..00000000
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diff --git a/srcd/superset/assets/stylesheets/fonts/SourceSansPro-SemiBold.ttf b/srcd/superset/assets/stylesheets/fonts/SourceSansPro-SemiBold.ttf
deleted file mode 100755
index d3ff6998..00000000
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diff --git a/srcd/superset/assets/stylesheets/fonts/SourceSansPro-SemiBoldItalic.ttf b/srcd/superset/assets/stylesheets/fonts/SourceSansPro-SemiBoldItalic.ttf
deleted file mode 100755
index 15725502..00000000
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diff --git a/srcd/superset/assets/stylesheets/fonts/SourceSansPro-Semibold.otf.woff2 b/srcd/superset/assets/stylesheets/fonts/SourceSansPro-Semibold.otf.woff2
new file mode 100755
index 00000000..8c27c184
Binary files /dev/null and b/srcd/superset/assets/stylesheets/fonts/SourceSansPro-Semibold.otf.woff2 differ
diff --git a/srcd/superset/assets/stylesheets/fonts/SourceSansPro-SemiboldIt.otf.woff2 b/srcd/superset/assets/stylesheets/fonts/SourceSansPro-SemiboldIt.otf.woff2
new file mode 100755
index 00000000..f963d781
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diff --git a/srcd/superset/assets/stylesheets/less/custom-brand.less b/srcd/superset/assets/stylesheets/less/custom-brand.less
index 39cf3c2c..972f6871 100644
--- a/srcd/superset/assets/stylesheets/less/custom-brand.less
+++ b/srcd/superset/assets/stylesheets/less/custom-brand.less
@@ -63,29 +63,35 @@
 
 @font-face {
   font-family: "Source Sans Pro";
-  src: url("../fonts/SourceSansPro-Black.ttf") format("truetype");
-  src: url("../fonts/SourceSansPro-BlackItalic.ttf") format("truetype");
-  src: url("../fonts/SourceSansPro-Bold.ttf") format("truetype");
-  src: url("../fonts/SourceSansPro-BoldItalic.ttf") format("truetype");
-  src: url("../fonts/SourceSansPro-ExtraLight.ttf") format("truetype");
-  src: url("../fonts/SourceSansPro-ExtraLightItalic.ttf") format("truetype");
-  src: url("../fonts/SourceSansPro-Italic.ttf") format("truetype");
-  src: url("../fonts/SourceSansPro-Light.ttf") format("truetype");
-  src: url("../fonts/SourceSansPro-LightItalic.ttf") format("truetype");
-  src: url("../fonts/SourceSansPro-SemiBold.ttf") format("truetype");
-  src: url("../fonts/SourceSansPro-SemiBoldItalic.ttf") format("truetype");
-  src: url("../fonts/SourceSansPro-Regular.ttf") format("truetype");
+  src: url("../fonts/SourceSansPro-Black.otf.woff2") format("woff2");
+  src: url("../fonts/SourceSansPro-BlackIt.otf.woff2") format("woff2");
+  src: url("../fonts/SourceSansPro-Bold.otf.woff2") format("woff2");
+  src: url("../fonts/SourceSansPro-BoldIt.otf.woff2") format("woff2");
+  src: url("../fonts/SourceSansPro-ExtraLight.otf.woff2") format("woff2");
+  src: url("../fonts/SourceSansPro-ExtraLightIt.otf.woff2") format("woff2");
+  src: url("../fonts/SourceSansPro-It.otf.woff2") format("woff2");
+  src: url("../fonts/SourceSansPro-Light.otf.woff2") format("woff2");
+  src: url("../fonts/SourceSansPro-LightIt.otf.woff2") format("woff2");
+  src: url("../fonts/SourceSansPro-Semibold.otf.woff2") format("woff2");
+  src: url("../fonts/SourceSansPro-SemiboldIt.otf.woff2") format("woff2");
+  src: url("../fonts/SourceSansPro-Regular.otf.woff2") format("woff2");
 }
 
 @font-face {
   font-family: "Source Code Pro";
-  src: url("../fonts/SourceCodePro-Black.ttf") format("truetype");
-  src: url("../fonts/SourceCodePro-Bold.ttf") format("truetype");
-  src: url("../fonts/SourceCodePro-ExtraLight.ttf") format("truetype");
-  src: url("../fonts/SourceCodePro-Light.ttf") format("truetype");
-  src: url("../fonts/SourceCodePro-Medium.ttf") format("truetype");
-  src: url("../fonts/SourceCodePro-Semibold.ttf") format("truetype");
-  src: url("../fonts/SourceCodePro-Regular.ttf") format("truetype");
+  src: url("../fonts/SourceCodePro-Medium.otf.woff2") format("woff2");
+  src: url("../fonts/SourceCodePro-Black.otf.woff2") format("woff2");
+  src: url("../fonts/SourceCodePro-Bold.otf.woff2") format("woff2");
+  src: url("../fonts/SourceCodePro-LightIt.otf.woff2") format("woff2");
+  src: url("../fonts/SourceCodePro-Semibold.otf.woff2") format("woff2");
+  src: url("../fonts/SourceCodePro-BoldIt.otf.woff2") format("woff2");
+  src: url("../fonts/SourceCodePro-It.otf.woff2") format("woff2");
+  src: url("../fonts/SourceCodePro-BlackIt.otf.woff2") format("woff2");
+  src: url("../fonts/SourceCodePro-MediumIt.otf.woff2") format("woff2");
+  src: url("../fonts/SourceCodePro-ExtraLight.otf.woff2") format("woff2");
+  src: url("../fonts/SourceCodePro-ExtraLightIt.otf.woff2") format("woff2");
+  src: url("../fonts/SourceCodePro-Light.otf.woff2") format("woff2");
+  src: url("../fonts/SourceCodePro-Regular.otf.woff2") format("woff2");
 }
 
 @font-family-sans-serif: "Source Sans Pro", "Helvetica Neue", Arial, sans-serif;