diff --git a/labs/labs_03.md b/labs/labs_03.md
index a540c734723aa8fd6e1915f0512b68cd17c1587c..bbb58c657283aa1c9924551b0b843062023b148e 100644
--- a/labs/labs_03.md
+++ b/labs/labs_03.md
@@ -57,7 +57,7 @@ different precedence and associativity.
 
 ### An LL(1) grammar for Amy
 
-As usual, the [Amy specification](amy specification) will guide you when
+As usual, the [Amy specification](amy specification.pdf) will guide you when
 it comes to deciding what exactly should be accepted by your parser.
 Carefully read Section 2 (*Syntax*).