diff --git a/docs/spec/overview.md b/docs/spec/overview.md
index 4c9034d11097832bce1c2f1f26e541482b16f608..0fec260e9b6d187ba790b8dcfeaf83dde4d7d07b 100644
--- a/docs/spec/overview.md
+++ b/docs/spec/overview.md
@@ -11,4 +11,5 @@ Please view the following documents (in roughly this order):
 1. tokens.md
 2. definitions.md
 3. statements.md
-4. expressions.md
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+4. expressions.md
+5. validation.md
\ No newline at end of file