diff --git a/README.md b/README.md
index 85d95b5..b29c319 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ Squib::Deck.new do
 end
 ```
 
-That script just created a deck of with 1 image at 825x1125 with the string "Hello, World" in the upper-left corner.
+We just created a deck with 1 card, 825x1125 pixels, with the string "Hello, World" in the upper-left corner, saved to a PNG.
 
 ## Installation
 
diff --git a/squib.gemspec b/squib.gemspec
index 4bdc479..19fdf25 100644
--- a/squib.gemspec
+++ b/squib.gemspec
@@ -39,7 +39,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rspec", "~> 3.0"
   spec.add_development_dependency "rspec-mocks", "~> 3.0"
   spec.add_development_dependency "redcarpet", '~> 3.1.2'
-  spec.add_development_dependency "github-markup", '~> 1.2.1'
+  spec.add_development_dependency "github-markup", '~> 1.3'
   spec.add_development_dependency "yard"
   spec.add_development_dependency "coveralls"