diff --git a/charts/shield/Chart.yaml b/charts/shield/Chart.yaml
index d3041b1ca..629506c3a 100644
--- a/charts/shield/Chart.yaml
+++ b/charts/shield/Chart.yaml
@@ -13,5 +13,5 @@ maintainers:
   - name: mavimo
     email: marcovito.moscaritolo@sysdig.com
 type: application
-version: 0.1.3
+version: 0.1.4
 appVersion: "1.0.0"
diff --git a/charts/shield/values.schema.json b/charts/shield/values.schema.json
index 848a4575b..e880fcd6f 100644
--- a/charts/shield/values.schema.json
+++ b/charts/shield/values.schema.json
@@ -85,7 +85,7 @@
       "type": "object",
       "properties": {
         "access_key": {
-          "type": "string",
+          "type": [ "string", "null" ],
           "description": "Sysdig Agent Access Key",
           "examples": [
             "12345678-1234-1234-1234-123456789012"