diff --git a/analyzer-comments/crystal/two-fer/string_concatenation.md b/analyzer-comments/crystal/two-fer/string_concatenation.md
index 9da7cd280..c11da857c 100644
--- a/analyzer-comments/crystal/two-fer/string_concatenation.md
+++ b/analyzer-comments/crystal/two-fer/string_concatenation.md
@@ -1,6 +1,6 @@
 # string concatenation
 
-String concatenation is perfectly valid within Ruby, but a more common way to compose a string is with [string interpolation](http://ruby-for-beginners.rubymonstas.org/bonus/string_interpolation.html). For example:
+String concatenation is perfectly valid within Ruby, but a more common way to compose a string is with [string interpolation][interpolation]. For example:
 
 ```crystal
 # Rather than:
@@ -9,3 +9,5 @@ String concatenation is perfectly valid within Ruby, but a more common way to co
 # Consider:
 "One for #{name_variable}, one for me."
 ```
+
+[interpolation]: https://crystal-lang.org/reference/latest/syntax_and_semantics/literals/string.html#interpolation