diff --git a/htman/htpasswd.py b/htman/htpasswd.py
index f485217..6c1611c 100644
--- a/htman/htpasswd.py
+++ b/htman/htpasswd.py
@@ -55,8 +55,9 @@ class HtpasswdFile:
         """
         self.entries = {}
         for line in open(self.filename, 'r').readlines():
-            username, pwhash = line.split(':', 1)
-            self.entries[username] = pwhash
+            if ":" in line:
+                username, pwhash = line.split(':', 1)
+                self.entries[username] = pwhash
 
     def save(self):
         """Write the htpasswd file to disk
@@ -96,5 +97,7 @@ class HtpasswdFile:
             self.entries.pop(username)
 
     def get_usernames(self):
-        return self.entries.keys()
+        names = self.entries.keys()
+        names.sort()
+        return names