diff --git a/lib/csp.js b/lib/csp.js
index cebc050c8..b343ea011 100644
--- a/lib/csp.js
+++ b/lib/csp.js
@@ -19,7 +19,7 @@ const defaultDirectives = {
     'https://www.slideshare.net/api/oembed/2',
     '\'unsafe-inline\'' // this is ignored by browsers supporting nonces/hashes
   ],
-  styleSrc: [config.serverURL + '/build/', '\'unsafe-inline\'', 'https://github.githubassets.com'], // unsafe-inline is required for some libs, plus used in views
+  styleSrc: [config.serverURL + '/build/', config.serverURL + '/css/', '\'unsafe-inline\'', 'https://github.githubassets.com'], // unsafe-inline is required for some libs, plus used in views
   objectSrc: ['*'], // Chrome PDF viewer treats PDFs as objects :/
   formAction: ['\'self\'']
 }