Add this to your user-config in your dotfile:

;; Require clojure-mode for ClojureScript indenting
(require 'clojure-mode)

;; ClojureScript indenting
 (define-clojure-indent
   (dom/a             :defn)
   (dom/abbr          :defn)
   (dom/address       :defn)
   (dom/area          :defn)
   (dom/article       :defn)
   (dom/aside         :defn)
   (dom/audio         :defn)
   (dom/b             :defn)
   (dom/base          :defn)
   (dom/bdi           :defn)
   (dom/bdo           :defn)
   (dom/big           :defn)
   (dom/blockquote    :defn)
   (dom/body          :defn)
   (dom/br            :defn)
   (dom/button        :defn)
   (dom/canvas        :defn)
   (dom/caption       :defn)
   (dom/cite          :defn)
   (dom/code          :defn)
   (dom/col           :defn)
   (dom/colgroup      :defn)
   (dom/data          :defn)
   (dom/datalist      :defn)
   (dom/dd            :defn)
   (dom/del           :defn)
   (dom/details       :defn)
   (dom/dfn           :defn)
   (dom/dialog        :defn)
   (dom/dl            :defn)
   (dom/dt            :defn)
   (dom/em            :defn)
   (dom/embed         :defn)
   (dom/fieldset      :defn)
   (dom/figcaption    :defn)
   (dom/figure        :defn)
   (dom/footer        :defn)
   (dom/form          :defn)
   (dom/h1            :defn)
   (dom/h2            :defn)
   (dom/h3            :defn)
   (dom/h4            :defn)
   (dom/h5            :defn)
   (dom/h6            :defn)
   (dom/head          :defn)
   (dom/header        :defn)
   (dom/hr            :defn)
   (dom/html          :defn)
   (dom/i             :defn)
   (dom/iframe        :defn)
   (dom/img           :defn)
   (dom/ins           :defn)
   (dom/kbd           :defn)
   (dom/keygen        :defn)
   (dom/label         :defn)
   (dom/legend        :defn)
   (dom/li            :defn)
   (dom/link          :defn)
   (dom/main          :defn)
   (dom/map           :defn)
   (dom/mark          :defn)
   (dom/menu          :defn)
   (dom/menuitem      :defn)
   (dom/meta          :defn)
   (dom/meter         :defn)
   (dom/nav           :defn)
   (dom/noscript      :defn)
   (dom/object        :defn)
   (dom/ol            :defn)
   (dom/optgroup      :defn)
   (dom/output        :defn)
   (dom/p             :defn)
   (dom/param         :defn)
   (dom/picture       :defn)
   (dom/pre           :defn)
   (dom/progress      :defn)
   (dom/q             :defn)
   (dom/rp            :defn)
   (dom/rt            :defn)
   (dom/ruby          :defn)
   (dom/s             :defn)
   (dom/samp          :defn)
   (dom/script        :defn)
   (dom/section       :defn)
   (dom/small         :defn)
   (dom/source        :defn)
   (dom/span          :defn)
   (dom/strong        :defn)
   (dom/style         :defn)
   (dom/sub           :defn)
   (dom/summary       :defn)
   (dom/sup           :defn)
   (dom/table         :defn)
   (dom/tbody         :defn)
   (dom/td            :defn)
   (dom/tfoot         :defn)
   (dom/th            :defn)
   (dom/thead         :defn)
   (dom/time          :defn)
   (dom/title         :defn)
   (dom/tr            :defn)
   (dom/track         :defn)
   (dom/u             :defn)
   (dom/ul            :defn)
   (dom/var           :defn)
   (dom/video         :defn)
   (dom/wbr           :defn)
   (dom/div :defn)
   (testing '(:defn (1)))
   (specification '(:defn (1)))
   (behaviour '(:defn (1)))
   (defui '(:defn (1))))