diff --git a/lib/keisan/version.rb b/lib/keisan/version.rb
index d0b6992..713edd4 100644
--- a/lib/keisan/version.rb
+++ b/lib/keisan/version.rb
@@ -1,3 +1,3 @@
 module Keisan
-  VERSION = "0.9.0"
+  VERSION = "0.9.1"
 end
diff --git a/spec/version_spec.rb b/spec/version_spec.rb
index d3b7e29..cbf7cde 100644
--- a/spec/version_spec.rb
+++ b/spec/version_spec.rb
@@ -2,6 +2,6 @@
 
 RSpec.describe Keisan do
   it "has the expected version number" do
-    expect(Keisan::VERSION).to eq "0.9.0"
+    expect(Keisan::VERSION).to eq "0.9.1"
   end
 end