diff --git a/charts/sogo/templates/session-cron.yaml b/charts/sogo/templates/session-cron.yaml
index 28fbeaf..fffe65f 100644
--- a/charts/sogo/templates/session-cron.yaml
+++ b/charts/sogo/templates/session-cron.yaml
@@ -9,5 +9,5 @@ metadata:
     app.kubernetes.io/instance: {{ .Release.Name }}
     app.kubernetes.io/managed-by: {{ .Release.Service }}
 data:
-  cron: {{ printf "* * * * * sogo  /usr/sbin/sogo-tool expire-sessions %d > /dev/null 2>&1" (.Values.sogo.sessionCleanup.maxInactivity | default 60) | squote }}
+  cron: {{ (printf "* * * * * sogo  /usr/sbin/sogo-tool expire-sessions %d > /dev/null 2>&1" (.Values.sogo.sessionCleanup.maxInactivity | int)) | squote }}
 {{- end }}