diff --git a/CHANGELOG.md b/CHANGELOG.md
index 041960456348..78792e06dfdc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 FEATURES:
 
+* **New Data Source:** `azurerm_network_security_group` [GH-623]
 * **New Data Source:** `azurerm_virtual_network` [GH-533]
 * **New Resource:** `azurerm_management_lock` [GH-575]
 * **New Resource:** `azurerm_network_watcher` [GH-571]