diff --git a/sigal/writer.py b/sigal/writer.py
index 6ef1570..67ef5df 100644
--- a/sigal/writer.py
+++ b/sigal/writer.py
@@ -23,9 +23,9 @@
 import importlib
 import logging
 import os
+import shutil
 import sys
 import types
-from distutils.dir_util import copy_tree
 
 import jinja2
 from jinja2 import ChoiceLoader, Environment, FileSystemLoader, PrefixLoader
@@ -95,7 +95,10 @@ class AbstractWriter:
 
         # Copy the theme files in the output dir
         self.theme_path = os.path.join(self.output_dir, 'static')
-        copy_tree(os.path.join(self.theme, 'static'), self.theme_path)
+        if os.path.isdir(self.theme_path):
+            shutil.rmtree(self.theme_path)
+        # FIXME: use dirs_exist_ok when minimum Python is 3.8
+        shutil.copytree(os.path.join(self.theme, 'static'), self.theme_path)
 
     def generate_context(self, album):
         """Generate the context dict for the given path."""