diff --git a/6_3_Sending_a_Transaction_with_Data.md b/6_4_Sending_a_Transaction_with_Data.md
similarity index 99%
rename from 6_3_Sending_a_Transaction_with_Data.md
rename to 6_4_Sending_a_Transaction_with_Data.md
index 010e160..9c2c406 100644
--- a/6_3_Sending_a_Transaction_with_Data.md
+++ b/6_4_Sending_a_Transaction_with_Data.md
@@ -1,4 +1,4 @@
-# 6.3: Sending a Transaction with Data
+# 6.4: Sending a Transaction with Data
 
 > **NOTE:** This is a draft in progress, so that I can get some feedback from early reviewers. It is not yet ready for learning.