diff --git a/packages/build_scripts/commit_version.py b/packages/build_scripts/commit_version.py
index af5df92e416..93a001f4886 100644
--- a/packages/build_scripts/commit_version.py
+++ b/packages/build_scripts/commit_version.py
@@ -26,7 +26,7 @@ def main(argv):
         history = history.replace(".dev0", " (%s)" % today_str)
         open(history_path, "w").write(history)
         mod = open(mod_path, "r").read()
-        mod = re.sub("__version__ = '[\d\.]*\.dev0'",
+        mod = re.sub(r"__version__ = '[\d\.]*\.dev0'",
                     "__version__ = '%s'" % version,
                     mod)
         mod = open(mod_path, "w").write(mod)
diff --git a/packages/build_scripts/new_version.py b/packages/build_scripts/new_version.py
index f12605c4b54..7de8a8c8ef7 100644
--- a/packages/build_scripts/new_version.py
+++ b/packages/build_scripts/new_version.py
@@ -49,7 +49,7 @@ def main(argv):
     mod_path = os.path.join(PROJECT_DIRECTORY, source_dir, PROJECT_MODULE_FILENAME)
     mod = open(mod_path, "r").read()
     if not DEV_RELEASE:
-        mod = re.sub("__version__ = '[\d\.]+'",
+        mod = re.sub(r"__version__ = '[\d\.]+'",
                     "__version__ = '%s.dev0'" % new_version,
                     mod, 1)
     else: