diff --git a/makesite.py b/makesite.py
index 2398f6a..fe12c22 100755
--- a/makesite.py
+++ b/makesite.py
@@ -87,7 +87,7 @@ def log(msg, *args):
 
 def truncate(text, words=25):
     """Remove tags and truncate text to the specified number of words."""
-    return " ".join(re.sub("(?s)<.*?>", " ", text).split()[:words])
+    return " ".join(re.sub(r"(?s)<.*?>", " ", text).split()[:words])
 
 
 def read_headers(text):
@@ -113,8 +113,8 @@ def slugify(value):
     value = (
         unicodedata.normalize("NFKD", value).encode("ascii", "ignore").decode("ascii")
     )
-    value = re.sub("[^\w\s-]", "", value).strip().lower()
-    return re.sub("[-\s]+", "-", value)
+    value = re.sub(r"[^\w\s-]", "", value).strip().lower()
+    return re.sub(r"[-\s]+", "-", value)
 
 
 def read_content(filename, params):
@@ -173,8 +173,8 @@ def clean_html_tag(text):
     """Remove HTML tags."""
     while True:
         original_text = text
-        text = re.sub("<\w+.*?>", "", text)
-        text = re.sub("<\/\w+>", "", text)
+        text = re.sub(r"<\w+.*?>", "", text)
+        text = re.sub(r"<\/\w+>", "", text)
         if original_text == text:
             break
     return text