diff --git a/README.md b/README.md
index 6671216..ca49ea5 100644
--- a/README.md
+++ b/README.md
@@ -76,7 +76,7 @@ Similar to `pcall` and `loadstring` calls, `load` returns status as the first va
 * maxlength (number) -- specify max length for all table elements.
 * metatostring (True/false) -- use `__tostring` metamethod when serializing tables (**v0.29**);
 set to `false` to disable and serialize the table as is, even when `__tostring` is present.
-* numformat (string; "%.17g") -- specify format for numeric values (shortest possible round-trippable double).
+* numformat (string; "%.17g") -- specify format for numeric values as shortest possible round-trippable double (**v0.30**).
 Use "%.16g" for better readability and "%.17g" (the default value) to preserve floating point precision.
 * valignore (table) -- allows to specify a list of values to ignore (as keys).
 * keyallow (table) -- allows to specify the list of keys to be serialized.