diff --git a/README.md b/README.md
index 668fa7dd..a722f3ac 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,15 @@ The integration will be discussed on the Pull Request.
 
 **Important**: You will have to find a maintainer willing to take care of the package while published if you want your app to be validated.
 
----
+#### Helper script
+
+You can use the <code>add_or_update.py</code> python script to add or update
+your app from one of the 2 json files.
+
+Usage:
+
+```bash
+python ./add_or_update.py [community.json OR official.json] [github url [github url [github url ...]]]
+```
 
 #### More information on [yunohost.org/packaging_apps](https://yunohost.org/packaging_apps)
-
diff --git a/add_or_update.py b/add_or_update.py
new file mode 100644
index 00000000..603e410b
--- /dev/null
+++ b/add_or_update.py
@@ -0,0 +1,64 @@
+import os
+import sys
+import json
+
+from urllib2 import urlopen
+
+states = {
+    1: "notworking",
+    2: "inprogress",
+    3: "working",
+}
+
+if __name__ == '__main__':
+    if not len(sys.argv[1:]):
+        print("I need a json file as first argument and a list of github urls")
+        sys.exit(0)
+
+    if len(sys.argv[1:]) < 2:
+        print("I need a list of github urls after the json file")
+        sys.exit(0)
+
+    if not os.path.exists(sys.argv[1]):
+        print("The json file '%s' doesn't exist" % sys.argv[1])
+
+    content = json.load(open(sys.argv[1], "r"))
+
+    for url in sys.argv[2:]:
+        if not url.startswith("https://github.com"):
+            sys.stderr.write("WARNING: url '%s' doesn't starts with https://github.com, skip it\n" % url)
+
+        owner, repo = filter(None, url.split("/"))[-2:]
+        project_name = filter(None, url.split("/"))[-1].replace("_ynh", "")
+
+        github_data = json.load(urlopen("https://api.github.com/repos/%(owner)s/%(repo)s/commits" % {"owner": owner, "repo": repo}))
+
+        if project_name not in content:
+            content[project_name] = {}
+        else:
+            print("INFO: project already in '%s', I'm updating it" % sys.argv[1])
+
+        content[project_name]["url"] = url
+        content[project_name]["revision"] = github_data[0]["sha"]
+        content[project_name]["branch"] = "master"
+
+        if sys.argv[1] == "official.json":
+            content[project_name]["state"] = "validated"
+
+        else:
+            got_state = False
+            while not got_state:
+                answer = input("Give me a state for this repository (digit or name) in:\n%s\n\nState: " % "\n".join(["%s: %s" % x for x in sorted(states.items(), key=lambda x: x[0])]) + "\n")
+
+                if answer in states:
+                    answer = states[answer]
+                    got_state = True
+                elif answer in states.values():
+                    got_state = True
+                else:
+                    print("Invalid state.\n")
+
+            content[project_name]["state"] = answer
+
+    open(sys.argv[1], "w").write("\n".join(json.dumps(content, indent=4, sort_keys=True).split(" \n")) + "\n")
+    os.system("git diff")
diff --git a/community.json b/community.json
index 924a1bed..1e4ff0b5 100644
--- a/community.json
+++ b/community.json
@@ -1,16 +1,16 @@
 {
-    "243": {
-        "branch": "master",
-        "revision": "b9d58efeac78feb7f74e723c999ff25ab7ab8b52",
-        "state": "ready",
-        "url": "https://github.com/M5oul/243_ynh"
-    },
     "20euros": {
         "branch": "master",
         "revision": "c8d5fadc9f042a92f14b753eff3ffc948322cf2d",
         "state": "ready",
         "url": "https://github.com/M5oul/20euros_ynh"
     },
+    "243": {
+        "branch": "master",
+        "revision": "b9d58efeac78feb7f74e723c999ff25ab7ab8b52",
+        "state": "ready",
+        "url": "https://github.com/M5oul/243_ynh"
+    },
     "adhocserver": {
         "branch": "master",
         "revision": "d1a728b9b99608bac69b55372cddf1aa3f4a5557",