diff --git a/lib/pio/version.rb b/lib/pio/version.rb
index 84ab9b22..e44ed0e8 100644
--- a/lib/pio/version.rb
+++ b/lib/pio/version.rb
@@ -1,5 +1,5 @@
 # Base module.
 module Pio
   # gem version.
-  VERSION = '0.28.0'.freeze
+  VERSION = '0.28.1'.freeze
 end