diff --git a/pythainlp/util/date.py b/pythainlp/util/date.py
index e9ad33c49..7185d0d2c 100644
--- a/pythainlp/util/date.py
+++ b/pythainlp/util/date.py
@@ -97,7 +97,7 @@
     ["ธันวาคม", "ธันวา", "ธ.ค.", "12"]
 ]
 thai_full_month_lists_regex = "(" + '|'.join(
-    [str('|'.join([j for j in i])) for i in thai_full_month_lists]
+    ['|'.join(i) for i in thai_full_month_lists]
 ) + ")"
 year_all_regex = r"(\d\d\d\d|\d\d)"
 dates_list = "(" + '|'.join(
diff --git a/setup.py b/setup.py
index 99304e68f..1a5cf2d3b 100644
--- a/setup.py
+++ b/setup.py
@@ -49,7 +49,8 @@
 
 requirements = [
     "requests>=2.22.0",
-    "backports.zoneinfo; python_version<'3.9'"
+    "backports.zoneinfo; python_version<'3.9'",
+    "tzdata; sys_platform == 'win32'"
 ]
 
 extras = {