diff --git a/lib/phlex/pdf/version.rb b/lib/phlex/pdf/version.rb
index c831079..58e479e 100644
--- a/lib/phlex/pdf/version.rb
+++ b/lib/phlex/pdf/version.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 module Phlex
-  module Pdf
+  module PDF
     VERSION = "0.1.2"
   end
 end
diff --git a/phlex-pdf.gemspec b/phlex-pdf.gemspec
index b8d47da..f3ca09d 100644
--- a/phlex-pdf.gemspec
+++ b/phlex-pdf.gemspec
@@ -4,7 +4,7 @@ require_relative "lib/phlex/pdf/version"
 
 Gem::Specification.new do |spec|
   spec.name = "phlex-pdf"
-  spec.version = Phlex::Pdf::VERSION
+  spec.version = Phlex::PDF::VERSION
   spec.authors = ["Brad Gessler"]
   spec.email = ["bradgessler@gmail.com"]
 
diff --git a/sig/phlex/pdf.rbs b/sig/phlex/pdf.rbs
index d4a00c8..e839579 100644
--- a/sig/phlex/pdf.rbs
+++ b/sig/phlex/pdf.rbs
@@ -1,5 +1,5 @@
 module Phlex
-  module Pdf
+  module PDF
     VERSION: String
     # See the writing guide of rbs: https://github.com/ruby/rbs#guides
   end