diff --git a/Import.md b/Import.md
index 2ac1666..6ef49b3 100644
--- a/Import.md
+++ b/Import.md
@@ -210,7 +210,7 @@ mapping:
         replacement: ""
 ```
 
-### deduplication
+### deduplication `optional`
 
 Currently there's only one deduplication rule type:
 
@@ -235,6 +235,9 @@ deduplication:
     match_type: strict
 ```
 
+> [!NOTE]
+> This is optional, omit it from your config file to disable deduplication.
+
 ## New versions
 
 New schema versions will be created when a **new addition** or **bug fix** can't keep backwards compatibility. This is not valid for the time Version 1 remains in beta.