diff --git a/deploy/df-wiki/templates/pvc-structure.yaml b/deploy/df-wiki/templates/pvc-structure.yaml
index e32645053d0e30f47d09de205a82d3e753264caa..acbe7073e7a77902ee95ab2b60fcbede0353a6f4 100644
--- a/deploy/df-wiki/templates/pvc-structure.yaml
+++ b/deploy/df-wiki/templates/pvc-structure.yaml
@@ -9,6 +9,6 @@ spec:
   - ReadWriteMany
   resources:
     requests:
-      storage: 40Gi
+      storage: 30Gi
   storageClassName: isilon
   volumeMode: Filesystem
\ No newline at end of file