diff --git a/README.md b/README.md
index d4f37d8..ebea3ea 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,7 @@ of the syntax and grammar are listed here.
 
   * Numbers are assumed to be base 10. If you prefix a number with 0x,
     it is treated as a hexadecimal. If it is prefixed with 0, it is
-    treated as an octal.
+    treated as an octal. Numbers can be in scientific notation: "1e10".
 
   * Boolean values: `true`, `false`, `on`, `off`, `yes`, `no`.