diff --git a/elasticsearch/values.yaml b/elasticsearch/values.yaml
index 3f3861ccb..db6caabf7 100644
--- a/elasticsearch/values.yaml
+++ b/elasticsearch/values.yaml
@@ -130,7 +130,7 @@ pod:
       container:
         memory_map_increase:
           privileged: true
-          readOnlyRootFilesystem: false
+          readOnlyRootFilesystem: true
         apache_proxy:
           readOnlyRootFilesystem: false
         elasticsearch_client:
@@ -139,53 +139,53 @@ pod:
             add:
               - IPC_LOCK
               - SYS_RESOURCE
-          readOnlyRootFilesystem: false
+          readOnlyRootFilesystem: true
     master:
       pod:
         runAsUser: 0
       container:
         memory_map_increase:
           privileged: true
-          readOnlyRootFilesystem: false
+          readOnlyRootFilesystem: true
         elasticsearch_master:
           privileged: true
           capabilities:
             add:
               - IPC_LOCK
               - SYS_RESOURCE
-          readOnlyRootFilesystem: false
+          readOnlyRootFilesystem: true
     es_cluster_wait:
       pod:
         runAsUser: 0
       container:
         elasticsearch_cluster_wait:
-          readOnlyRootFilesystem: false
+          readOnlyRootFilesystem: true
     snapshot_repository:
       pod:
         runAsUser: 0
       container:
         register_snapshot_repository:
-          readOnlyRootFilesystem: false
+          readOnlyRootFilesystem: true
     test:
       pod:
         runAsUser: 0
       container:
         helm_test:
-          readOnlyRootFilesystem: false
+          readOnlyRootFilesystem: true
     data:
       pod:
         runAsUser: 0
       container:
         memory_map_increase:
           privileged: true
-          readOnlyRootFilesystem: false
+          readOnlyRootFilesystem: true
         elasticsearch_data:
           privileged: true
           capabilities:
             add:
               - IPC_LOCK
               - SYS_RESOURCE
-          readOnlyRootFilesystem: false
+          readOnlyRootFilesystem: true
   affinity:
       anti:
         type: