diff --git a/src/clj/commiteth/db/core.clj b/src/clj/commiteth/db/core.clj
index 31ee788..a33f2e0 100644
--- a/src/clj/commiteth/db/core.clj
+++ b/src/clj/commiteth/db/core.clj
@@ -1,12 +1,13 @@
 (ns commiteth.db.core
   (:require
-    [cheshire.core :refer [generate-string parse-string]]
-    [clojure.java.jdbc :as jdbc]
-    [conman.core :as conman]
-    [commiteth.config :refer [env]]
-    [mount.core :refer [defstate]]
-    [migratus.core :as migratus]
-    [mpg.core :as mpg])
+   [cheshire.core :refer [generate-string parse-string]]
+   [clojure.java.jdbc :as jdbc]
+   [conman.core :as conman]
+   [commiteth.config :refer [env]]
+   [mount.core :refer [defstate]]
+   [migratus.core :as migratus]
+   [mpg.core :as mpg]
+   [clojure.string :as str])
   (:import org.postgresql.util.PGobject
            java.sql.Array
            clojure.lang.IPersistentMap
@@ -75,7 +76,7 @@
     (let [conn      (.getConnection stmt)
           meta      (.getParameterMetaData stmt)
           type-name (.getParameterTypeName meta idx)]
-      (if-let [elem-type (when (= (first type-name) \_) (apply str (rest type-name)))]
+      (if-let [elem-type (when (= (first type-name) \_) (str/join (rest type-name)))]
         (.setObject stmt idx (.createArrayOf conn elem-type (to-array v)))
         (.setObject stmt idx (to-pg-json v))))))
 
diff --git a/src/clj/commiteth/db/repositories.clj b/src/clj/commiteth/db/repositories.clj
index 9477108..7f23f9a 100644
--- a/src/clj/commiteth/db/repositories.clj
+++ b/src/clj/commiteth/db/repositories.clj
@@ -20,10 +20,10 @@
 (defn get-enabled
   "Lists enabled repository id's for a given user-id"
   [user-id]
-  (->>
+  (mapcat
+   vals
     (jdbc/with-db-connection [con-db *db*]
-      (db/get-enabled-repositories con-db {:user_id user-id}))
-    (mapcat vals)))
+      (db/get-enabled-repositories con-db {:user_id user-id}))))
 
 (defn update-repo
   [repo-id updates]
diff --git a/src/clj/commiteth/eth/core.clj b/src/clj/commiteth/eth/core.clj
index 078435b..5afdc52 100644
--- a/src/clj/commiteth/eth/core.clj
+++ b/src/clj/commiteth/eth/core.clj
@@ -71,7 +71,7 @@
                             :gas   gas})]
     (eth-rpc
      "personal_sendTransaction"
-     [(if (not (nil? to))
+     [(if-not (nil? to)
         (merge args {:to to})
         args)
       (eth-password)])))
@@ -143,8 +143,7 @@
            (log/debug "address hash" hash "addr" addr)
            (->>
             (map-indexed (fn [idx _]
-                           (let [hash-ch-int (-> (nth hash idx)
-                                                 (hex-ch->num))
+                           (let [hash-ch-int (hex-ch->num (nth hash idx))
                                  ch (nth addr idx)
                                  ch-lower (lower-ch ch)
                                  ch-upper (upper-ch ch)]
diff --git a/src/clj/commiteth/github/core.clj b/src/clj/commiteth/github/core.clj
index faacbe7..4ba2152 100644
--- a/src/clj/commiteth/github/core.clj
+++ b/src/clj/commiteth/github/core.clj
@@ -82,15 +82,15 @@
   own login."
   [token]
   (let [all-repos-with-admin-access
-        (->>
-         (map #(merge
-                {:owner-login (get-in % [:owner :login])}
-                {:owner-type (get-in % [:owner :type])}
-                {:owner-avatar-url (get-in % [:owner :avatar_url])}
-                (select-keys % repo-fields))
-              (repos/repos (merge (auth-params token) {:type      "all"
-                                                       :all-pages true})))
-         (filter #(-> % :permissions :admin)))]
+        (filter #(-> % :permissions :admin)
+                (map #(merge
+                       {:owner-login (get-in % [:owner :login])}
+                       {:owner-type (get-in % [:owner :type])}
+                       {:owner-avatar-url (get-in % [:owner :avatar_url])}
+                       (select-keys % repo-fields))
+                     (repos/repos
+                      (merge (auth-params token) {:type      "all"
+                                                  :all-pages true}))))]
     (group-by :owner-login all-repos-with-admin-access)))
 
 (defn get-user
diff --git a/src/clj/commiteth/routes/home.clj b/src/clj/commiteth/routes/home.clj
index eb0cef1..3996c2c 100644
--- a/src/clj/commiteth/routes/home.clj
+++ b/src/clj/commiteth/routes/home.clj
@@ -25,5 +25,5 @@
   (GET "/" {{user :identity} :session}
        (home-page user))
   (GET "/logout" {session :session}
-       (-> (redirect "/")
-           (assoc :session (dissoc session :identity)))))
+       (assoc (redirect "/")
+              :session (dissoc session :identity))))
diff --git a/src/clj/commiteth/routes/redirect.clj b/src/clj/commiteth/routes/redirect.clj
index 7c84800..aa3f97c 100644
--- a/src/clj/commiteth/routes/redirect.clj
+++ b/src/clj/commiteth/routes/redirect.clj
@@ -44,7 +44,7 @@
         (response/redirect "/")
         (let [admin-token? (str/includes? scope "repo")
               token-key (if admin-token? :admin-token :token)
-              user (-> (get-or-create-user access-token)
-                       (assoc token-key access-token))]
-          (-> (response/redirect "/")
-            (assoc :session {:identity user})))))))
+              user (assoc (get-or-create-user access-token)
+                          token-key access-token)]
+          (assoc (response/redirect "/")
+                 :session {:identity user}))))))
diff --git a/src/clj/commiteth/routes/services.clj b/src/clj/commiteth/routes/services.clj
index ffa3019..bca7b7d 100644
--- a/src/clj/commiteth/routes/services.clj
+++ b/src/clj/commiteth/routes/services.clj
@@ -109,8 +109,9 @@
                 :let [b (update ob :balance decimal->str)]]
             [(:issue_id b)
              (conj b
-                   (let [claims (->> (bounties-db/bounty-claims (:issue_id b))
-                                     (map #(update % :balance decimal->str)))]
+                   (let [claims (map
+                                 #(update % :balance decimal->str)
+                                 (bounties-db/bounty-claims (:issue_id b)))]
                      {:claims claims}))]))))
 
 
diff --git a/src/clj/commiteth/scheduler.clj b/src/clj/commiteth/scheduler.clj
index 11a5983..3fbfb4b 100644
--- a/src/clj/commiteth/scheduler.clj
+++ b/src/clj/commiteth/scheduler.clj
@@ -181,7 +181,7 @@
 (mount/defstate scheduler
   :start (let [every-minute (rest
                              (periodic-seq (t/now)
-                                           (-> 1 t/minutes)))
+                                           (t/minutes 1)))
                stop-fn (chime-at every-minute
                                  run-periodic-tasks
                                  {:error-handler (fn [e]
diff --git a/src/clj/commiteth/util/digest.clj b/src/clj/commiteth/util/digest.clj
index 563d013..7732c66 100644
--- a/src/clj/commiteth/util/digest.clj
+++ b/src/clj/commiteth/util/digest.clj
@@ -1,9 +1,10 @@
 (ns commiteth.util.digest
-  (:import [javax.crypto]))
+  (:import [javax.crypto])
+  (:require [clojure.string :as str]))
 
 ;; credit: https://gist.github.com/visibletrap/4571244
 (defn hex-hmac-sha1 [key input]
-  (let [secret (javax.crypto.spec.SecretKeySpec. (. key getBytes "UTF-8") "HmacSHA1")
+  (let [secret (javax.crypto.spec.SecretKeySpec. (.getBytes key "UTF-8") "HmacSHA1")
         hmac-sha1 (doto (javax.crypto.Mac/getInstance "HmacSHA1") (.init secret))
-        bytes (. hmac-sha1 doFinal (. input getBytes "UTF-8"))]
-    (apply str (map (partial format "%02x") bytes))))
+        bytes (.doFinal hmac-sha1 (.getBytes input "UTF-8"))]
+    (str/join (map (partial format "%02x") bytes))))
diff --git a/src/clj/commiteth/util/png_rendering.clj b/src/clj/commiteth/util/png_rendering.clj
index 6679e06..0845bb0 100644
--- a/src/clj/commiteth/util/png_rendering.clj
+++ b/src/clj/commiteth/util/png_rendering.clj
@@ -26,8 +26,8 @@
 
 
 (defn gen-comment-image [address balance issue-url]
-  (let [qr-image  (-> (image->base64 (generate-qr-image address))
-                      (String. "ISO-8859-1"))
+  (let [qr-image  (String. (image->base64 (generate-qr-image address))
+                           "ISO-8859-1")
         html (:body (render "bounty.html"
                             {:qr-image  qr-image
                              :balance   balance
@@ -37,7 +37,7 @@
         {out :out err :err exit :exit}
         (sh command "-f" "png" "--quality" "80" "--width" "1336" "-" "-"
             :out-enc :bytes :in html)]
-    (if (= 0 exit)
+    (if (zero? exit)
       (do
         (log/debug "PNG generated succesfully" out err exit html)
         out)
diff --git a/src/cljs/commiteth/activity.cljs b/src/cljs/commiteth/activity.cljs
index 0abb971..9450c61 100644
--- a/src/cljs/commiteth/activity.cljs
+++ b/src/cljs/commiteth/activity.cljs
@@ -39,7 +39,7 @@
     [:div.description
      [item-description item]]
     [:div.footer-row
-     (when (not (= item-type "new-bounty"))
+     (when-not (= item-type "new-bounty")
        [:div.balance-badge (str "ETH " balance )])
      [:div.time (moment-timestamp updated)]]]])
 
diff --git a/src/cljs/commiteth/common.cljs b/src/cljs/commiteth/common.cljs
index c9b50f1..9d302f0 100644
--- a/src/cljs/commiteth/common.cljs
+++ b/src/cljs/commiteth/common.cljs
@@ -25,8 +25,7 @@
 (defn moment-timestamp [time]
   (let [now (.now js/Date.)
         js-time (clj->js time)]
-    (-> (js/moment.utc)
-        (.to js-time))))
+    (.to (js/moment.utc) js-time)))
 
 (defn issue-url [owner repo number]
   (str "https://github.com/" owner "/" repo "/issues/" number))
diff --git a/src/cljs/commiteth/core.cljs b/src/cljs/commiteth/core.cljs
index 1cca72e..1a53e65 100644
--- a/src/cljs/commiteth/core.cljs
+++ b/src/cljs/commiteth/core.cljs
@@ -119,7 +119,7 @@
         (into [:div.ui.items.top-hunters]
               (map-indexed (fn [idx hunter]
                              [:div.item
-                              [:div.leader-ordinal (str (+ 1 idx))]
+                              [:div.leader-ordinal (str (inc idx))]
                               [:div.ui..mini.circular.image
                                [:img {:src (:avatar-url hunter)}]]
                               [:div.content
diff --git a/src/cljs/commiteth/handlers.cljs b/src/cljs/commiteth/handlers.cljs
index 9046d7a..18236b3 100644
--- a/src/cljs/commiteth/handlers.cljs
+++ b/src/cljs/commiteth/handlers.cljs
@@ -69,7 +69,7 @@
 
 
 (defn assoc-in-if-not-empty [m path val]
-  (if (not (empty? val))
+  (if (seq val)
     (assoc-in m path val)
     m))
 
@@ -105,7 +105,7 @@
     (if-let [res (and ks (dissoc-in (get m k) ks))]
       (assoc m k res)
       (let [res (dissoc m k)]
-        (when-not (empty? res)
+        (when (seq res)
           res)))))
 
 (reg-event-fx
@@ -251,10 +251,12 @@
 (reg-event-db
  :repo-toggle-success
  (fn [db [_ repo]]
-   (assoc db :repos (update-repo-state (:repos db)
-                                       (:full_name repo)
-                                       {:busy? false
-                                        :enabled (:enabled repo)} ))))
+   (update-in db
+              [:repos]
+              update-repo-state
+              (:full_name repo)
+              {:busy? false
+               :enabled (:enabled repo)})))
 
 (reg-event-fx
  :repo-toggle-error
@@ -315,11 +317,10 @@
   [issue-id]
   (fn [error payout-hash]
     (when error
-      (do
-        (dispatch [:set-flash-message
-                   :error
-                   (str "Error sending transaction: " error)])
-        (dispatch [:payout-confirm-failed issue-id])))
+      (dispatch [:set-flash-message
+                 :error
+                 (str "Error sending transaction: " error)])
+      (dispatch [:payout-confirm-failed issue-id]))
     (when payout-hash
       (dispatch [:save-payout-hash issue-id payout-hash]))))
 
diff --git a/src/cljs/commiteth/update_address.cljs b/src/cljs/commiteth/update_address.cljs
index 016d333..8d8c9f0 100644
--- a/src/cljs/commiteth/update_address.cljs
+++ b/src/cljs/commiteth/update_address.cljs
@@ -11,7 +11,7 @@
         address (r/atom @(rf/subscribe [:get-in [:user :address]]))]
     (fn []
       (let [web3 (.-web3 js/window)
-            web3-accounts (into [] (when-not (nil? web3) (-> web3
+            web3-accounts (vec (when-not (nil? web3) (-> web3
                                                          .-eth
                                                          .-accounts
                                                          js->clj)))]
@@ -24,9 +24,9 @@
            (if-not (empty? web3-accounts)
              [dropdown {:class "address-input"} "Select address"
               address
-              (into []
-                    (for [acc web3-accounts]
-                      acc))]
+              (vec
+               (for [acc web3-accounts]
+                 acc))]
              [:div.ui.input.address-input
               [input address {:placeholder  "0x0000000000000000000000000000000000000000"
                               :auto-complete "off"