Bump version.

Bump version.

diff --git a/Gemfile.lock b/Gemfile.lock
index c9f7044..28c851b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    onebox (1.8.90)
+    onebox (1.8.91)
       htmlentities (~> 4.3)
       moneta (~> 1.0)
       multi_json (~> 1.11)
diff --git a/lib/onebox/version.rb b/lib/onebox/version.rb
index 7e4f59d..8a722ce 100644
--- a/lib/onebox/version.rb
+++ b/lib/onebox/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Onebox
-  VERSION = "1.8.90"
+  VERSION = "1.8.91"
 end

GitHub sha: 225862fc