diff --git a/bin/cljsc.clj b/bin/cljsc.clj
index 3ae8a78b0d..41f817fcf0 100644
--- a/bin/cljsc.clj
+++ b/bin/cljsc.clj
@@ -6,14 +6,15 @@
 ;   the terms of this license.
 ;   You must not remove this notice, or any other, from this software.
 
-(require '[cljs.closure :as closure])
+(require '[cljs.closure :as closure]
+         '[clojure.edn :as edn])
 
 (defn transform-cl-args
   [args]
   (let [source (first args)
         opts-string (apply str (interpose " " (rest args)))
         options (when (> (count opts-string) 1)
-                  (try (read-string opts-string)
+                  (try (edn/read-string opts-string)
                     (catch Exception e
                       (binding [*out* *err*]
                         (println "Failed to parse command line args:" e)))))]
diff --git a/src/main/clojure/cljs/closure.clj b/src/main/clojure/cljs/closure.clj
index 55e7181f0b..459a9a7cba 100644
--- a/src/main/clojure/cljs/closure.clj
+++ b/src/main/clojure/cljs/closure.clj
@@ -17,6 +17,7 @@
             [cljs.env :as env]
             [cljs.foreign.node :refer [package-json-entries node-file-seq->libs-spec*]]
             [cljs.js-deps :as deps]
+            [clojure.edn :as edn]
             [clojure.java.io :as io]
             [clojure.java.shell :as sh]
             [clojure.reflect]
@@ -2231,7 +2232,7 @@
   ([]
    (get-upstream-deps* (. (Thread/currentThread) (getContextClassLoader))))
   ([classloader]
-   (let [upstream-deps (map #(read-string (slurp %))
+   (let [upstream-deps (map #(edn/read-string (slurp %))
                          (enumeration-seq (. classloader (getResources "deps.cljs"))))]
      (apply merge-with
        (fn [a b]
diff --git a/src/main/clojure/cljs/repl/browser.clj b/src/main/clojure/cljs/repl/browser.clj
index 9b333127e4..39e7f8e296 100644
--- a/src/main/clojure/cljs/repl/browser.clj
+++ b/src/main/clojure/cljs/repl/browser.clj
@@ -299,7 +299,7 @@
   (constrain-order order
     (fn []
       (binding [*out* (or (and repl (.get outs repl)) *out*)]
-        (print (read-string content))
+        (print (edn/read-string content))
         (.flush *out*))))
   (server/send-and-close conn 200 "ignore__"))
 
@@ -322,7 +322,7 @@
       (fn [val] (deliver return-value val)))
     (let [ret @return-value]
       (try
-        (read-string ret)
+        (edn/read-string ret)
         (catch Exception e
           {:status :error
            :value (str "Could not read return value: " ret)})))))
diff --git a/src/main/clojure/cljs/repl/reflect.clj b/src/main/clojure/cljs/repl/reflect.clj
index 48302db567..5f591306d0 100644
--- a/src/main/clojure/cljs/repl/reflect.clj
+++ b/src/main/clojure/cljs/repl/reflect.clj
@@ -11,6 +11,7 @@
   (:require [cljs.repl.server :as server]
             [cljs.analyzer :as analyzer]
             [cljs.compiler :as compiler]
+            [clojure.edn :as edn]
             [clojure.string :as str]
             [clojure.pprint :as pprint]))
 
@@ -48,7 +49,7 @@
 (defn- url-decode [encoded & [encoding]]
   (java.net.URLDecoder/decode encoded (or encoding "UTF-8")))
 
-(def read-url-string (comp read-string url-decode))
+(def read-url-string (comp edn/read-string url-decode))
 
 (defn parse-param
   "Parses the query parameter of a path of the form \"/reflect?var=foo\"
diff --git a/src/main/clojure/cljs/repl/server.clj b/src/main/clojure/cljs/repl/server.clj
index 18aacfd561..9e697b38c5 100644
--- a/src/main/clojure/cljs/repl/server.clj
+++ b/src/main/clojure/cljs/repl/server.clj
@@ -8,7 +8,8 @@
 
 (ns cljs.repl.server
   (:refer-clojure :exclude [loaded-libs])
-  (:require [clojure.string :as str])
+  (:require [clojure.string :as str]
+            [clojure.edn :as edn])
   (:import java.io.BufferedReader
            java.io.InputStreamReader
            java.io.ByteArrayOutputStream
@@ -191,7 +192,7 @@
                          handler))
                      handlers)]
         (if (= :post (:method request))
-          (handler (read-string (:content request)) conn opts )
+          (handler (edn/read-string (:content request)) conn opts )
           (handler request conn opts))
         (send-404 conn (:path request))))
     (catch Throwable t