diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9bda7dab..c9020d92 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 4.20.1 (2026-06-01)
+
+### Fixed
+- Corrected Usage Summary API documentation URLs to use `/usage_summary/` instead of `/usage_summaries/`.
+
 ### v4.20.0 (2026-05-04)
 * * *
 ### New Resources:
diff --git a/VERSION b/VERSION
index bafdf705..2c9b9c37 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.20.0
+4.20.1
diff --git a/src/Actions/Contracts/UsageSummaryActionsInterface.php b/src/Actions/Contracts/UsageSummaryActionsInterface.php
index 688278a5..d006558b 100644
--- a/src/Actions/Contracts/UsageSummaryActionsInterface.php
+++ b/src/Actions/Contracts/UsageSummaryActionsInterface.php
@@ -12,7 +12,7 @@
 {
 
     /**
-    *   @see https://apidocs.chargebee.com/docs/api/usage_summaries/retrieve-usage-summary-for-a-subscription?lang=php-v4
+    *   @see https://apidocs.chargebee.com/docs/api/usage_summary/retrieve-usage-summary-for-a-subscription?lang=php-v4
     *   @param array{
     *     limit?: int,
     *     offset?: string,
diff --git a/src/Actions/UsageSummaryActions.php b/src/Actions/UsageSummaryActions.php
index f3d9f655..466b9a3c 100644
--- a/src/Actions/UsageSummaryActions.php
+++ b/src/Actions/UsageSummaryActions.php
@@ -25,7 +25,7 @@ public function __construct(HttpClientFactory $httpClientFactory, Environment $e
     }
 
     /**
-    *   @see https://apidocs.chargebee.com/docs/api/usage_summaries/retrieve-usage-summary-for-a-subscription?lang=php-v4
+    *   @see https://apidocs.chargebee.com/docs/api/usage_summary/retrieve-usage-summary-for-a-subscription?lang=php-v4
     *   @param array{
     *     limit?: int,
     *     offset?: string,
diff --git a/src/Version.php b/src/Version.php
index 1b43c3c5..d70305a0 100644
--- a/src/Version.php
+++ b/src/Version.php
@@ -4,7 +4,7 @@
 
 final class Version
 {
-	const VERSION = '4.20.0';
+	const VERSION = '4.20.1';
 }
 
 ?>
\ No newline at end of file