diff --git a/5_1_Resending_a_Transaction_with_RBF.md b/5_2_Resending_a_Transaction_with_RBF.md
similarity index 98%
rename from 5_1_Resending_a_Transaction_with_RBF.md
rename to 5_2_Resending_a_Transaction_with_RBF.md
index 76c8c1c..f168430 100644
--- a/5_1_Resending_a_Transaction_with_RBF.md
+++ b/5_2_Resending_a_Transaction_with_RBF.md
@@ -1,4 +1,4 @@
-# 4.1: Resending a Transaction with RBF
+# 5.2: Resending a Transaction with RBF
 
 > **NOTE:** This is a draft in progress, so that I can get some feedback from early reviewers. It is not yet ready for learning.