diff --git a/charts/nextcloud-mcp-server/.cz.toml b/charts/nextcloud-mcp-server/.cz.toml
index 905754c..dafdc7b 100644
--- a/charts/nextcloud-mcp-server/.cz.toml
+++ b/charts/nextcloud-mcp-server/.cz.toml
@@ -1,6 +1,6 @@
 [tool.commitizen]
 name = "cz_conventional_commits"
-version = "0.57.39"
+version = "0.57.40"
 tag_format = "nextcloud-mcp-server-$version"
 version_scheme = "semver"
 update_changelog_on_bump = true
diff --git a/charts/nextcloud-mcp-server/CHANGELOG.md b/charts/nextcloud-mcp-server/CHANGELOG.md
index 8109a7a..3b31012 100644
--- a/charts/nextcloud-mcp-server/CHANGELOG.md
+++ b/charts/nextcloud-mcp-server/CHANGELOG.md
@@ -14,6 +14,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Configurable resource limits
 - Grafana dashboard annotations
 
+## nextcloud-mcp-server-0.57.40 (2026-02-07)
+
+### Fix
+
+- use CalDAV time-range filter for calendar date range queries
+
 ## nextcloud-mcp-server-0.57.39 (2026-02-07)
 
 ## nextcloud-mcp-server-0.57.38 (2026-02-07)
diff --git a/charts/nextcloud-mcp-server/Chart.yaml b/charts/nextcloud-mcp-server/Chart.yaml
index 066183c..046bf2d 100644
--- a/charts/nextcloud-mcp-server/Chart.yaml
+++ b/charts/nextcloud-mcp-server/Chart.yaml
@@ -2,7 +2,7 @@ apiVersion: v2
 name: nextcloud-mcp-server
 description: A Helm chart for Nextcloud MCP Server - enables AI assistants to interact with Nextcloud
 type: application
-version: 0.57.39
+version: 0.57.40
 appVersion: "0.63.2"
 keywords:
   - nextcloud