diff --git a/update.py b/update.py
index f1d1664f..a9cb42c7 100644
--- a/update.py
+++ b/update.py
@@ -1,9 +1,78 @@
 import os
 import sys
-
+import json
+import re
 
 def update():
-    print("Updating not supported yet")
+    from Config import config
+
+    if getattr(sys, 'source_update_dir', False):
+        if not os.path.isdir(sys.source_update_dir):
+            os.makedirs(sys.source_update_dir)
+        source_path = sys.source_update_dir.rstrip("/")
+    else:
+        source_path = os.getcwd().rstrip("/")
+
+    updatesite_path = config.data_dir + "/" + config.updatesite
+
+    sites_json = json.load(open(config.data_dir + "/sites.json"))
+    updatesite_bad_files = sites_json.get(config.updatesite, {}).get("cache", {}).get("bad_files", {})
+    print(
+        "Update site path: %s, bad_files: %s, source path: %s, dist type: %s" %
+        (updatesite_path, len(updatesite_bad_files), source_path, config.dist_type)
+    )
+
+    inner_paths = json.load(open(updatesite_path + "/content.json"))["files"].keys()
+
+    # Keep file only in ZeroNet directory
+    inner_paths = [inner_path for inner_path in inner_paths if inner_path.startswith("core/")]
+
+    # Checking plugins
+    plugins_enabled = []
+    plugins_disabled = []
+    if os.path.isdir("%s/plugins" % source_path):
+        for dir in os.listdir("%s/plugins" % source_path):
+            if dir.startswith("disabled-"):
+                plugins_disabled.append(dir.replace("disabled-", ""))
+            else:
+                plugins_enabled.append(dir)
+        print("Plugins enabled:", plugins_enabled, "disabled:", plugins_disabled)
+
+    for inner_path in inner_paths:
+        if ".." in inner_path:
+            continue
+        inner_path = inner_path.replace("\\", "/")  # Make sure we have unix path
+        print(".", end=" ")
+        dest_path = source_path + "/" + re.sub("^(core|platform/[^/]+/)/", "", inner_path)
+        dest_path = dest_path.lstrip("/")
+        if not dest_path:
+            continue
+
+        # Keep plugin disabled/enabled status
+        match = re.match("plugins/([^/]+)", dest_path)
+        if match:
+            plugin_name = match.group(1).replace("disabled-", "")
+            if plugin_name in plugins_enabled:  # Plugin was enabled
+                dest_path = dest_path.replace("plugins/disabled-" + plugin_name, "plugins/" + plugin_name)
+            elif plugin_name in plugins_disabled:  # Plugin was disabled
+                dest_path = dest_path.replace("plugins/" + plugin_name, "plugins/disabled-" + plugin_name)
+            print("P", end=" ")
+
+        dest_dir = os.path.dirname(dest_path)
+        print(updatesite_path + "/" + inner_path, "->", dest_path)
+        if dest_dir and not os.path.isdir(dest_dir):
+            os.makedirs(dest_dir)
+
+        if dest_dir != dest_path.strip("/"):
+            data = open(updatesite_path + "/" + inner_path, "rb").read()
+
+            try:
+                open(dest_path, 'wb').write(data)
+            except Exception as err:
+                print(dest_path, err)
+
+    print("Done.")
+
     return False
 
 if __name__ == "__main__":