diff --git a/README.md b/README.md
index d5e181e..1c363c6 100644
--- a/README.md
+++ b/README.md
@@ -18,13 +18,14 @@ To generate a Dockerfile from spec:
 (defn- heap [heap] (str "-Xmx=" heap "m "))
 (defn- port [port] (str "-Dport=" port))
 
-(d/write-dockerfile! [:from     "java:8"
-                      :run      (lazy-seq ["mkdir" "-p" "/var/opt/folder"])
-                      :user     "nobody"
-                      :add      ["from" "to"]
-                      :workdir  "/var/opt/folder"
-                      :cmd      ["java" (heap 512) (port 512) ["-jar" "artifact.jar"]]]
-                      "path/to/dockerfile")       
+(-> [:from     "java:8"
+                :run      (lazy-seq ["mkdir" "-p" "/var/opt/folder"])
+                :user     "nobody"
+                :add      ["from" "to"]
+                :workdir  "/var/opt/folder"
+                :cmd      ["java" (heap 512) (port 512) ["-jar" "artifact.jar"]]]
+    (d/new-dockerfile)
+    (d/write! "path/to/dockerfile"))    
 ```
 
 The content of the generated Dockerfile will be:
@@ -44,10 +45,14 @@ To validate a dockerfile spec:
 (:require [cljocker.hh.dsl.docker :as d])
             
 (is (= [:valid]
-       (d/validate [:from "image" :cmd "echo"])))   
+       (-> [:from "image" :cmd "echo"]
+           (d/new-dockerfile)
+           (d/validate))))   
        
 (is (= [:invalid "first instruction must be FROM"]
-       (d/validate [:cmd "echo"])))
+       (-> [:cmd "echo"]
+           (d/new-dockerfile)
+           (d/validate))))
 ```
 
 
diff --git a/project.clj b/project.clj
index 66be106..1fc33cd 100644
--- a/project.clj
+++ b/project.clj
@@ -1,4 +1,4 @@
-(defproject minhtuannguyen/cljocker "0.1.7-SNAPSHOT"
+(defproject minhtuannguyen/cljocker "0.1.7"
   :description "a dockerfile dsl written in clojure"
   :url ""
   :license {:name "Eclipse Public License"