diff --git a/charts/caduser/v0.1.0/templates/postgresql-objectstore.yaml b/charts/caduser/v0.1.0/templates/postgresql-objectstore.yaml
index 7aeb2e0..c81ae77 100644
--- a/charts/caduser/v0.1.0/templates/postgresql-objectstore.yaml
+++ b/charts/caduser/v0.1.0/templates/postgresql-objectstore.yaml
@@ -7,6 +7,12 @@ metadata:
   labels:
     {{- include "caduser.labels" . | nindent 4 }}
 spec:
+  instanceSidecarConfiguration:
+    env:
+      - name: AWS_REQUEST_CHECKSUM_CALCULATION
+        value: when_required
+      - name: AWS_RESPONSE_CHECKSUM_VALIDATION
+        value: when_required
   configuration:
     destinationPath: {{ .Values.postgresql.backup.destinationPath }}
     endpointURL: {{ .Values.postgresql.backup.s3.endpointURL }}