diff --git a/What-is-rule-file-and-how-to-write-one.md b/v3.x-What-is-rule-file-and-how-to-write-one.md
similarity index 100%
rename from What-is-rule-file-and-how-to-write-one.md
rename to v3.x-What-is-rule-file-and-how-to-write-one.md