diff --git a/data/plz.py b/data/plz.py
index eca62a1..e1688c9 100755
--- a/data/plz.py
+++ b/data/plz.py
@@ -5,7 +5,7 @@ from typing import List, Tuple, Callable
 import argparse
 import requests
 import re
-import xlrd
+import openpyxl
 import tempfile
 import os
 import zipfile
@@ -92,7 +92,7 @@ def get_plz_url(button: re.Pattern) -> str:
 def download_excel(url: str, transform: Callable[[List[str]], Tuple]) -> List:
     f_name = None
     try:
-        f = tempfile.NamedTemporaryFile(delete=False)
+        f = tempfile.NamedTemporaryFile(suffix='.xlsx', delete=False)
         with requests.get(url, stream=True, headers={'User-Agent': 'Mozilla/5.0'}) as r:
             if r.status_code != 200:
                 raise RuntimeError(f'Unexpected response: {r.status_code} {r.reason}')
@@ -102,11 +102,14 @@ def download_excel(url: str, transform: Callable[[List[str]], Tuple]) -> List:
         f.close()
 
         rows = []
-        wb = xlrd.open_workbook(f_name)
-        sheet = wb.sheet_by_index(0)
-        for r in range(1, sheet.nrows):
-            row = sheet.row_values(r)
-            rows.append(transform(row))
+        wb = openpyxl.open(f_name)
+        sheet = wb.worksheets[0]
+        first = True
+        for row in sheet.rows:
+            if first:
+                first = False
+                continue
+            rows.append(transform([r.value for r in row]))
         return rows
     finally:
         if f_name is not None: