(defproject com.nomistech/clojure-the-language "0.1.0-SNAPSHOT"
  :dependencies [[cheshire "5.4.0"]
                 [com.climate/claypoole "1.1.4"]
                 [com.taoensso/timbre "4.8.0"]
                 [org.clojure/clojure "1.9.0"]
                 [org.clojure/core.async "0.3.442"] 
                 [org.clojure/core.match "0.3.0-alpha4"]
                 [prismatic/schema "1.0.5"]
                 [slingshot "0.12.2"]]
  :repl-options {:init-ns user}
  :profiles {:dev {:dependencies [[org.clojure/tools.namespace "0.2.11"]
                                  [midje "1.7.0"]]
                   :source-paths ["dev"]
                   :plugins [[lein-midje "3.1.3"]]}})

(defproject com.nomistech/clojure-the-language "0.1.0-SNAPSHOT"
  :dependencies [[cheshire "5.4.0"]
                 [com.climate/claypoole "1.1.4"]
                 [com.taoensso/timbre "4.8.0"]
                 [org.clojure/clojure "1.9.0"]
                 [org.clojure/core.async "0.3.442"] 
                 [org.clojure/core.match "0.3.0-alpha4"]
                 [prismatic/schema "1.0.5"]
                 [slingshot "0.12.2"]]
  :repl-options {:init-ns user}
  :profiles {:dev {:dependencies [[org.clojure/tools.namespace "0.2.11"]
                                  [midje "1.9.1"]]
                   :source-paths ["dev"]
                   :plugins [[lein-midje "3.2.1"]]}})

Upgrade to Midje 1.9.1 nd lein-midje 3.2.1
Upgrade to Midje 1.9.1 nd lein-midje 3.2.1

simon-katz/nomis-clojure-the-language