diff --git a/library/packaging/homebrew b/library/packaging/homebrew
index aafb7aaa87..2ecac0c4ac 100644
--- a/library/packaging/homebrew
+++ b/library/packaging/homebrew
@@ -112,6 +112,8 @@ class Homebrew(object):
 
     VALID_PACKAGE_CHARS = r'''
         \w                  # alphanumeric characters (i.e., [a-zA-Z0-9_])
+        .                   # dots
+        \+                  # plusses
         -                   # dashes
     '''