diff --git a/tom/dependencies.py b/tom/dependencies.py
index 370b74a..08976f0 100644
--- a/tom/dependencies.py
+++ b/tom/dependencies.py
@@ -63,7 +63,7 @@ def get_deps_list(self, branch="master"):
         options_lines = options_file.splitlines()
         if branch == "3.7.x":
             filtered_lines = (
-                x for x in options_lines if re.match('\s*DEPS=".*\\$DEPS', x)
+                x for x in options_lines if re.match(r'\s*DEPS=".*\$DEPS', x)
             )
             only_deps = (re.sub("\\$?DEPS", "", x) for x in filtered_lines)
             only_deps = (re.sub('[=";]', "", x) for x in only_deps)
@@ -183,7 +183,7 @@ def extract_version_from_filename(self, dep, filename):
             version = re.search("w32-([0-9-]*)-rel", filename).group(1)
             separator = "-"
         else:
-            version = re.search("[-_]([0-9.]*)[\.-]", filename).group(1)
+            version = re.search(r"[-_]([0-9.]*)[\.-]", filename).group(1)
             separator = "."
         return (version, separator)
 
@@ -437,7 +437,7 @@ def update_deps_version(self, branches):
                 # \[([a-z0-9-]*)\] will match [PHP]
                 # \((.*?)\) will match (http://php.net/)
                 match = re.match(
-                    "\| \[([a-z0-9-]*)\]\((.*?)\) ", line, flags=re.IGNORECASE
+                    r"\| \[([a-z0-9-]*)\]\((.*?)\) ", line, flags=re.IGNORECASE
                 )
                 if match:
                     dep_title = match.group(1)
@@ -454,7 +454,7 @@ def update_deps_version(self, branches):
                     )
                     deps_table[dep] = collections.defaultdict(lambda: "-")
                 if has_notes:
-                    note = re.search("\| ([^|]*) \|$", line)
+                    note = re.search(r"\| ([^|]*) \|$", line)
                     if not note:
                         log.warn("didn't find note in line [%s]", line)
                         note = ""
diff --git a/tom/packages.py b/tom/packages.py
index 52d8b06..e431109 100644
--- a/tom/packages.py
+++ b/tom/packages.py
@@ -44,9 +44,9 @@ def is_branch_or_version(string):
     optionally followed by letter (3.12.5b) for aplha/beta/gamma...zeta,
     optionally followed by release (3.12.5-2).
     """
-    if string == "master" or re.match("3\.\\d+\.x$", string):
+    if string == "master" or re.match(r"3\.\d+\.x$", string):
         return "branch"
-    if re.match("3\\.\\d+\\.\\d+[a-z]?(-\\d+)?$", string):
+    if re.match(r"3\.\d+\.\d+[a-z]?(-\d+)?$", string):
         return "version"
     return None