diff --git a/testUpdateHostsFile.py b/testUpdateHostsFile.py
index 55f6db55e..62616dbc9 100644
--- a/testUpdateHostsFile.py
+++ b/testUpdateHostsFile.py
@@ -1743,9 +1743,7 @@ class TestIsValidDomainFormat(BaseStdout):
         self.assertTrue(expected in output)
 
     def test_invalid_domain(self):
-        expected = (
-            "Do not include www.domain.com or http(s)://domain.com. Try again."
-        )
+        expected = "Do not include www.domain.com or http(s)://domain.com. Try again."
 
         for invalid_domain in [
             "www.subdomain.domain",
diff --git a/updateHostsFile.py b/updateHostsFile.py
index 5df7978e1..8eaff1717 100644
--- a/updateHostsFile.py
+++ b/updateHostsFile.py
@@ -1089,12 +1089,7 @@ def write_opening_header(final_file, **header_params):
                 ),
             )
     else:
-        write_data(
-            final_file,
-            "# Title: StevenBlack/hosts\n#\n".format(
-                ", ".join(header_params["extensions"])
-            ),
-        )
+        write_data(final_file, "# Title: StevenBlack/hosts\n#\n")
 
     write_data(
         final_file,
@@ -1210,6 +1205,11 @@ def update_readme_data(readme_file, **readme_updates):
         readme_data = json.load(f)
         readme_data[extensions_key] = generation_data
 
+    for denomination, data in readme_data.copy().items():
+        if "location" in data and data["location"] and "\\" in data["location"]:
+            # Windows compatibility: #1166
+            readme_data[denomination]["location"] = data["location"].replace("\\", "/")
+
     with open(readme_file, "w") as f:
         json.dump(readme_data, f)
 
diff --git a/updateReadme.py b/updateReadme.py
index b4b0be192..f7530d4ab 100644
--- a/updateReadme.py
+++ b/updateReadme.py
@@ -80,7 +80,10 @@ def main():
             source_rows += t.substitute(this_row) + "\n"
 
         with open(
-            os.path.join(data[key]["location"], README_FILENAME), "wt", encoding="utf-8", newline="\n"
+            os.path.join(data[key]["location"], README_FILENAME),
+            "wt",
+            encoding="utf-8",
+            newline="\n",
         ) as out:
             for line in open(README_TEMPLATE, encoding="utf-8", newline="\n"):
                 line = line.replace(