diff --git a/api/openapi-spec/swagger.json b/api/openapi-spec/swagger.json
index 3be69d41e88..d62f58bc189 100644
--- a/api/openapi-spec/swagger.json
+++ b/api/openapi-spec/swagger.json
@@ -34956,11 +34956,8 @@
       "description": "Data contains the secret data. Each key must be a valid DNS_SUBDOMAIN or leading dot followed by valid DNS_SUBDOMAIN. The serialized form of the secret data is a base64 encoded string, representing the arbitrary (possibly non-string) data value here. Described in https://tools.ietf.org/html/rfc4648#section-4",
       "type": "object",
       "additionalProperties": {
-       "type": "array",
-       "items": {
-        "type": "integer",
-        "format": "byte"
-       }
+       "type": "string",
+       "format": "byte"
       }
      },
      "metadata": {
diff --git a/cmd/libs/go2idl/openapi-gen/generators/openapi.go b/cmd/libs/go2idl/openapi-gen/generators/openapi.go
index ad12815610e..fec9acf78e9 100644
--- a/cmd/libs/go2idl/openapi-gen/generators/openapi.go
+++ b/cmd/libs/go2idl/openapi-gen/generators/openapi.go
@@ -446,10 +446,15 @@ func (g openAPITypeWriter) generateMapProperty(t *types.Type) error {
 	}
 	g.Do("Type: []string{\"object\"},\n", nil)
 	g.Do("AdditionalProperties: &spec.SchemaOrBool{\nSchema: &spec.Schema{\nSchemaProps: spec.SchemaProps{\n", nil)
+	typeString, format := common.GetOpenAPITypeFormat(elemType.String())
+	if typeString != "" {
+		g.generateSimpleProperty(typeString, format)
+		g.Do("},\n},\n},\n", nil)
+		return nil
+	}
 	switch elemType.Kind {
 	case types.Builtin:
-		typeString, format := common.GetOpenAPITypeFormat(elemType.String())
-		g.generateSimpleProperty(typeString, format)
+		return fmt.Errorf("please add type %v to getOpenAPITypeFormat function.", elemType)
 	case types.Struct:
 		g.generateReferenceProperty(t.Elem)
 	case types.Slice, types.Array:
@@ -465,10 +470,15 @@ func (g openAPITypeWriter) generateSliceProperty(t *types.Type) error {
 	elemType := resolveAliasAndPtrType(t.Elem)
 	g.Do("Type: []string{\"array\"},\n", nil)
 	g.Do("Items: &spec.SchemaOrArray{\nSchema: &spec.Schema{\nSchemaProps: spec.SchemaProps{\n", nil)
+	typeString, format := common.GetOpenAPITypeFormat(elemType.String())
+	if typeString != "" {
+		g.generateSimpleProperty(typeString, format)
+		g.Do("},\n},\n},\n", nil)
+		return nil
+	}
 	switch elemType.Kind {
 	case types.Builtin:
-		typeString, format := common.GetOpenAPITypeFormat(elemType.String())
-		g.generateSimpleProperty(typeString, format)
+		return fmt.Errorf("please add type %v to getOpenAPITypeFormat function.", elemType)
 	case types.Struct:
 		g.generateReferenceProperty(t.Elem)
 	default:
diff --git a/federation/apis/openapi-spec/swagger.json b/federation/apis/openapi-spec/swagger.json
index acf10e55ddd..108ad12232a 100644
--- a/federation/apis/openapi-spec/swagger.json
+++ b/federation/apis/openapi-spec/swagger.json
@@ -9273,11 +9273,8 @@
       "description": "Data contains the secret data. Each key must be a valid DNS_SUBDOMAIN or leading dot followed by valid DNS_SUBDOMAIN. The serialized form of the secret data is a base64 encoded string, representing the arbitrary (possibly non-string) data value here. Described in https://tools.ietf.org/html/rfc4648#section-4",
       "type": "object",
       "additionalProperties": {
-       "type": "array",
-       "items": {
-        "type": "integer",
-        "format": "byte"
-       }
+       "type": "string",
+       "format": "byte"
       }
      },
      "metadata": {
diff --git a/pkg/generated/openapi/zz_generated.openapi.go b/pkg/generated/openapi/zz_generated.openapi.go
index 245c859b4de..9d5d56737b5 100644
--- a/pkg/generated/openapi/zz_generated.openapi.go
+++ b/pkg/generated/openapi/zz_generated.openapi.go
@@ -12326,15 +12326,8 @@ var OpenAPIDefinitions *common.OpenAPIDefinitions = &common.OpenAPIDefinitions{
 							AdditionalProperties: &spec.SchemaOrBool{
 								Schema: &spec.Schema{
 									SchemaProps: spec.SchemaProps{
-										Type: []string{"array"},
-										Items: &spec.SchemaOrArray{
-											Schema: &spec.Schema{
-												SchemaProps: spec.SchemaProps{
-													Type:   []string{"integer"},
-													Format: "byte",
-												},
-											},
-										},
+										Type:   []string{"string"},
+										Format: "byte",
 									},
 								},
 							},