diff --git a/files/routes/login.py b/files/routes/login.py
index e8a63a14e3..981d7c7e50 100644
--- a/files/routes/login.py
+++ b/files/routes/login.py
@@ -268,10 +268,10 @@ def sign_up_post(v):
 			"password") == request.values.get("password_confirm"):
 		return new_signup("Passwords did not match. Please try again.")
 
-	if not valid_username_regex.fullmatch(username, flags=re.A):
+	if not valid_username_regex.fullmatch(username):
 		return new_signup("Invalid username")
 
-	if not valid_password_regex.fullmatch(request.values.get("password"), flags=re.A):
+	if not valid_password_regex.fullmatch(request.values.get("password")):
 		return new_signup("Password must be between 8 and 100 characters.")
 
 	email = request.values.get("email").strip().lower()
diff --git a/files/routes/settings.py b/files/routes/settings.py
index 0da71bbe3b..2e49d8f284 100644
--- a/files/routes/settings.py
+++ b/files/routes/settings.py
@@ -532,7 +532,7 @@ def settings_security_post(v):
 		if request.values.get("new_password") != request.values.get("cnf_password"):
 			return render_template("settings_security.html", v=v, error="Passwords do not match.")
 
-		if not valid_password_regex.fullmatch(request.values.get("new_password"), flags=re.A):
+		if not valid_password_regex.fullmatch(request.values.get("new_password")):
 			return render_template("settings_security.html", v=v, error="Password must be between 8 and 100 characters.")
 
 		if not v.verifyPass(request.values.get("old_password")):
@@ -859,7 +859,7 @@ def settings_name_change(v):
 						   v=v,
 						   error="You didn't change anything")
 
-	if not valid_username_regex.fullmatch(new_name, flags=re.A):
+	if not valid_username_regex.fullmatch(new_name):
 		return render_template("settings_profile.html",
 						   v=v,
 						   error="This isn't a valid username.")
diff --git a/files/routes/subs.py b/files/routes/subs.py
index 7b1fbd12ad..caf3819f3d 100644
--- a/files/routes/subs.py
+++ b/files/routes/subs.py
@@ -273,7 +273,7 @@ def create_sub2(v):
 	if not name: abort(400)
 	name = name.strip().lower()
 
-	if not valid_sub_regex.fullmatch(name, flags=re.A):
+	if not valid_sub_regex.fullmatch(name):
 		return render_template("sub/create_sub.html", v=v, error="Sub name not allowed."), 400
 
 	sub = g.db.query(Sub).filter_by(name=name).one_or_none()