diff --git a/cmd/webhook.go b/cmd/webhook.go
index dca5a79..f8f0a9d 100644
--- a/cmd/webhook.go
+++ b/cmd/webhook.go
@@ -14,6 +14,7 @@ import (
 	admissionv1 "k8s.io/api/admission/v1"
 	corev1 "k8s.io/api/core/v1"
 	k8serrors "k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/serializer"
@@ -225,6 +226,22 @@ func createPatch(pod *corev1.Pod, sidecarConfigTemplate *Config, annotations map
 	tempSidecarConfig, _ := deepcopy.Anything(sidecarConfigTemplate)
 	sidecarConfig := tempSidecarConfig.(*Config)
 
+	// Defines the resources for the kerberos sidecar container.
+	// Had to be defined here, the unmarshalling was not working correctly
+	// when it was defined in the configmap definition
+	sidecarResources := corev1.ResourceRequirements{
+		Requests: corev1.ResourceList{
+			corev1.ResourceCPU:    resource.MustParse("1m"),
+			corev1.ResourceMemory: resource.MustParse("2.2M"),
+		},
+		Limits: corev1.ResourceList{
+			corev1.ResourceCPU:    resource.MustParse("5m"),
+			corev1.ResourceMemory: resource.MustParse("20M"),
+		},
+	}
+
+	sidecarConfig.Containers[0].Resources = sidecarResources
+
 	// Add container and volume to the patch
 	patch = append(patch, addContainer(pod.Spec.Containers, sidecarConfig.Containers, "/spec/containers")...)
 	patch = append(patch, addVolume(pod.Spec.Volumes, sidecarConfig.Volumes, "/spec/volumes")...)