diff --git a/install.py b/install.py
index <HASH>..<HASH> 100644
--- a/install.py
+++ b/install.py
@@ -324,9 +324,9 @@ def install(inst, version):
     elif version is None:  # install the stable version
         subprocess.check_call([pycmd, '-m', 'pip', 'install',
                                '--upgrade', 'openquake.engine'])
-    #elif '.' in version:  # install an official version
-    #    subprocess.check_call([pycmd, '-m', 'pip', 'install',
-    #                           '--upgrade', 'openquake.engine==' + version])
+    elif '.' in version:  # install an official version
+        subprocess.check_call([pycmd, '-m', 'pip', 'install',
+                               '--upgrade', 'openquake.engine==' + version])
     else:  # install a branch from github (only for user or server)
         commit = latest_commit(version)
         print('Installing commit', commit)
reset change for the installing of official version