diff --git a/Cargo.lock b/Cargo.lock
index a08dee5..52c8ed4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -592,7 +592,7 @@ dependencies = [
 
 [[package]]
 name = "rustlings"
-version = "2.2.1"
+version = "3.0.0"
 dependencies = [
  "assert_cmd 0.11.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/info.toml b/info.toml
index 632e6ee..4fbf9fd 100644
--- a/info.toml
+++ b/info.toml
@@ -52,7 +52,8 @@ because we want to assign a different typed value to an existing variable. Somet
 you may also like to reuse existing variable names because you are just converting
 values to different types like in this exercise.
 Fortunately Rust has a powerful solution to this problem: 'Shadowing'!
-You can read more about 'Shadowing' in the book's section 'Variables and Mutability'.
+You can read more about 'Shadowing' in the book's section 'Variables and Mutability': 
+https://doc.rust-lang.org/book/ch03-01-variables-and-mutability.html#shadowing
 Try to solve this exercise afterwards using this technique."""
 
 # IF