diff --git a/app/models/tag.rb b/app/models/tag.rb
index 8fab98fb5..46e55d74f 100644
--- a/app/models/tag.rb
+++ b/app/models/tag.rb
@@ -37,7 +37,7 @@ class Tag < ApplicationRecord
 
   HASHTAG_RE = %r{(?<![=/)\w])#(#{HASHTAG_NAME_PAT})}i
   HASHTAG_NAME_RE = /\A(#{HASHTAG_NAME_PAT})\z/i
-  HASHTAG_INVALID_CHARS_RE = /[^[:alnum:]#{HASHTAG_SEPARATORS}]/
+  HASHTAG_INVALID_CHARS_RE = /[^[:alnum:]\u0E47-\u0E4E#{HASHTAG_SEPARATORS}]/
 
   validates :name, presence: true, format: { with: HASHTAG_NAME_RE }
   validates :display_name, format: { with: HASHTAG_NAME_RE }