diff --git a/example/project.clj b/example/project.clj
index b637568d..85b6628e 100644
--- a/example/project.clj
+++ b/example/project.clj
@@ -22,7 +22,7 @@
 
   :plugins [[lein-ring "0.8.13" :exclusions [org.clojure/clojure]]
             #_[lein-cljsbuild "1.1.2"]
-            [lein-figwheel "0.5.20"]
+            [lein-figwheel "0.5.21-SNAPSHOT"]
             #_[lein-npm "0.4.0"]]
 
   :node-dependencies [[source-map-support "0.2.8"]
@@ -116,7 +116,7 @@
 
   :profiles { :dev { :dependencies [;[cider/piggieback "0.2.1"]
 
-                                    [figwheel-sidecar "0.5.20"]
+                                    [figwheel-sidecar "0.5.21-SNAPSHOT"]
                                     [org.clojure/tools.namespace "0.2.11"]
                                     #_[org.clojure/tools.nrepl "0.2.12"]
                                     #_[leiningen-core "2.6.1"]
diff --git a/plugin/project.clj b/plugin/project.clj
index 1b749f9b..9224aa8f 100644
--- a/plugin/project.clj
+++ b/plugin/project.clj
@@ -1,4 +1,4 @@
-(defproject lein-figwheel "0.5.20"
+(defproject lein-figwheel "0.5.21-SNAPSHOT"
   :description "ClojureScript Autobuilder/Server which pushes changed files to the browser. This is the lein plugin."
   :url "https://github.com/bhauman/lein-figwheel"
   :license {:name "Eclipse Public License - v 1.0"
diff --git a/plugin/src/leiningen/figwheel.clj b/plugin/src/leiningen/figwheel.clj
index f6f3ae5f..502d8139 100644
--- a/plugin/src/leiningen/figwheel.clj
+++ b/plugin/src/leiningen/figwheel.clj
@@ -12,7 +12,7 @@
    [leiningen.figwheel.fuzzy :as fuz]
    [simple-lein-profile-merge.core :as lm]))
 
-(def _figwheel-version_ "0.5.20")
+(def _figwheel-version_ "0.5.21-SNAPSHOT")
 (def _rebel-readline-cljs-version_ "0.1.4")
 
 (defn make-subproject [project paths-to-add]
diff --git a/sidecar/project.clj b/sidecar/project.clj
index 152aab91..099ba87c 100644
--- a/sidecar/project.clj
+++ b/sidecar/project.clj
@@ -1,4 +1,4 @@
-(defproject figwheel-sidecar "0.5.20"
+(defproject figwheel-sidecar "0.5.21-SNAPSHOT"
   :description "ClojureScript Autobuilder/Server which pushes changed files to the browser."
   :url "https://github.com/bhauman/lein-figwheel"
   :license {:name "Eclipse Public License - v 1.0"
@@ -24,7 +24,7 @@
      org.clojure/clojure]]
    [co.deps/ring-etag-middleware "0.2.1"]
    [clj-stacktrace "0.2.8"]
-   [figwheel "0.5.20"
+   [figwheel "0.5.21-SNAPSHOT"
       :exclusions [org.clojure/tools.reader]]
    [hawk "0.2.11" :exclusions [org.clojure/clojure]]
 
diff --git a/sidecar/src/figwheel_sidecar/config.clj b/sidecar/src/figwheel_sidecar/config.clj
index 6197e49b..e85bdd9c 100644
--- a/sidecar/src/figwheel_sidecar/config.clj
+++ b/sidecar/src/figwheel_sidecar/config.clj
@@ -19,7 +19,7 @@
 
 #_(remove-ns 'figwheel-sidecar.config)
 
-(def _figwheel-version_ "0.5.20")
+(def _figwheel-version_ "0.5.21-SNAPSHOT")
 
 ;; needed to determine the default color setting because windows
 ;; obtained these detection patterns from Jline3
diff --git a/support/project.clj b/support/project.clj
index dc3d7690..3c2f6b57 100644
--- a/support/project.clj
+++ b/support/project.clj
@@ -1,4 +1,4 @@
-(defproject figwheel "0.5.20"
+(defproject figwheel "0.5.21-SNAPSHOT"
   :description "This project contains the client side code for Figwheel."
   :url "https://github.com/bhauman/lein-figwheel"
   :license {:name "Eclipse Public License - v 1.0"
diff --git a/support/src/figwheel/client.cljs b/support/src/figwheel/client.cljs
index cbc63a71..1acde057 100644
--- a/support/src/figwheel/client.cljs
+++ b/support/src/figwheel/client.cljs
@@ -15,7 +15,7 @@
   (:require-macros
    [cljs.core.async.macros :refer [go go-loop]]))
 
-(def _figwheel-version_ "0.5.20")
+(def _figwheel-version_ "0.5.21-SNAPSHOT")
 
 (def js-stringify
   (if (and (exists? js/JSON) (some? js/JSON.stringify))