diff --git a/amazon/ipv4.txt b/amazon/ipv4.txt
index 2603149d..e3af464e 100644
--- a/amazon/ipv4.txt
+++ b/amazon/ipv4.txt
@@ -1250,6 +1250,7 @@
 15.221.35.0/24
 15.221.36.0/22
 15.221.4.0/23
+15.221.40.0/21
 15.221.48.0/24
 15.221.49.0/24
 15.221.50.0/24
diff --git a/amazon/ipv4_merged.txt b/amazon/ipv4_merged.txt
index fd3a09dd..bc5ab768 100644
--- a/amazon/ipv4_merged.txt
+++ b/amazon/ipv4_merged.txt
@@ -139,6 +139,7 @@
 15.221.33.0/24
 15.221.34.0/23
 15.221.36.0/22
+15.221.40.0/21
 15.221.48.0/22
 15.221.52.0/23
 15.222.0.0/15