tried a couple of things to be sure it works on the github

project.clj

@@ -4,7 +4,8 @@
   :license {:name "Eclipse Public License"
             :url "http://www.eclipse.org/legal/epl-v10.html"}
   :dependencies [[org.clojure/clojure "1.9.0-RC1"]
-                 [clj-http "3.7.0"]]
+                 [clj-http "3.7.0"]
+                 [hiccup "1.0.5"]]
   :main ^:skip-aot graphly.core
   :plugins [[lein-jupyter "0.1.10"]]
   :target-path "target/%s"