diff --git a/manifests/node-exporter-prometheusRule.yaml b/manifests/node-exporter-prometheusRule.yaml
index e24216fafa8211b7192df4fa63d8b890e68ab766..7f36e602cb23231f5b1dabe6cb874fd4d113ea73 100644
--- a/manifests/node-exporter-prometheusRule.yaml
+++ b/manifests/node-exporter-prometheusRule.yaml
@@ -21,7 +21,7 @@ spec:
         summary: Filesystem is predicted to run out of space within the next 24 hours.
       expr: |
         (
-          node_filesystem_avail_bytes{job="node-exporter",fstype!=""} / node_filesystem_size_bytes{job="node-exporter",fstype!=""} * 100 < 40
+          node_filesystem_avail_bytes{job="node-exporter",fstype!=""} / node_filesystem_size_bytes{job="node-exporter",fstype!=""} * 100 < 20
         and
           predict_linear(node_filesystem_avail_bytes{job="node-exporter",fstype!=""}[6h], 24*60*60) < 0
         and