diff --git a/oml/commands.py b/oml/commands.py
index 31d4464..96404da 100644
--- a/oml/commands.py
+++ b/oml/commands.py
@@ -110,8 +110,8 @@ def command_update_static(*args):
         r('git', 'clone', 'https://git.0x2620.org/oxjs.git', oxjs)
     elif os.path.exists(os.path.join(oxjs, '.git')):
         os.system('cd "%s" && git pull' % oxjs)
-    r('python2', os.path.join(oxjs, 'tools', 'build', 'build.py'))
-    r('python2', os.path.join(settings.static_path, 'py', 'build.py'))
+    r('python3', os.path.join(oxjs, 'tools', 'build', 'build.py'))
+    r('python3', os.path.join(settings.static_path, 'py', 'build.py'))
 
 def command_release(*args):
     """
diff --git a/static/py/build.py b/static/py/build.py
index fe52b40..22f5588 100644
--- a/static/py/build.py
+++ b/static/py/build.py
@@ -14,7 +14,7 @@ ox.file.write_json('../json/js.json', files, indent=4)
 ox.file.write_file(
     '%soml.min.js' % path,
     '\n'.join([
-        ox.js.minify(ox.file.read_file('%s%s' % (path, file)))
+        ox.js.minify(ox.file.read_file('%s%s' % (path, file)).decode('utf-8'))
         for file in files
     ])
 )