diff --git a/README.md b/README.md
index 091e702..0586403 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@
 
 Keisan ([計算, to calculate](https://en.wiktionary.org/wiki/%E8%A8%88%E7%AE%97#Japanese)) is a Ruby library for parsing equations into an abstract syntax tree.
 This allows for safe evaluation of string representations of mathematical/logical expressions.
-It has support for variables, functions, conditionals, and loops, making it a Turing complete programming language.
+It has support for variables, functions, conditionals, and loops, making it a [Turing complete](https://github.com/project-eutopia/keisan/blob/master/spec/keisan/turing_machine_spec.rb) programming language.
 
 ## Installation
 
diff --git a/spec/readme_spec.rb b/spec/readme_spec.rb
index 88d1f97..669a312 100644
--- a/spec/readme_spec.rb
+++ b/spec/readme_spec.rb
@@ -13,7 +13,7 @@
       digest = Digest::SHA256.hexdigest(content)
 
       # cat README.md | sha256sum
-      expected_digest = "dd513ecb875f48179171a8ddbdce30504f3aa133219cb2ee1151cb00339741f6"
+      expected_digest = "6f410103fd872b5767d8b4ca836f9e7ed38803a5a059cb44b7cc8f9b84b9bf3c"
       if digest != expected_digest
         raise "Invalid README file detected with SHA256 digest of #{digest}. Use command `cat README.md | sha256sum` to get correct digest if your changes to the README are safe. Aborting README test."
       end