diff --git a/pkg/controller/onepassworditem/onepassworditem_controller.go b/pkg/controller/onepassworditem/onepassworditem_controller.go
index 3c808bd..11bec45 100644
--- a/pkg/controller/onepassworditem/onepassworditem_controller.go
+++ b/pkg/controller/onepassworditem/onepassworditem_controller.go
@@ -3,6 +3,8 @@ package onepassworditem
 import (
 	"context"
 	"fmt"
+	"regexp"
+	"strings"
 
 	onepasswordv1 "github.com/1Password/onepassword-operator/pkg/apis/onepassword/v1"
 	kubeSecrets "github.com/1Password/onepassword-operator/pkg/kubernetessecrets"
@@ -15,6 +17,7 @@ import (
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/runtime"
+	kubeValidate "k8s.io/apimachinery/pkg/util/validation"
 	ctrl "sigs.k8s.io/controller-runtime"
 	kubeClient "sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/controller"
@@ -143,7 +146,7 @@ func (r *ReconcileOnePasswordItem) removeOnePasswordFinalizerFromOnePasswordItem
 }
 
 func (r *ReconcileOnePasswordItem) HandleOnePasswordItem(resource *onepasswordv1.OnePasswordItem, request reconcile.Request) error {
-	secretName := resource.GetName()
+	secretName := formatK8sSecretName(resource.GetName())
 	autoRestart := resource.Annotations[op.RestartDeploymentsAnnotation]
 
 	item, err := onepassword.GetOnePasswordItemByPath(r.opConnectClient, resource.Spec.ItemPath)
@@ -153,3 +156,27 @@ func (r *ReconcileOnePasswordItem) HandleOnePasswordItem(resource *onepasswordv1
 
 	return kubeSecrets.CreateKubernetesSecretFromItem(r.kubeClient, secretName, resource.Namespace, item, autoRestart)
 }
+
+// formatK8sSecretName replaces any characters not supported by K8s secret names
+//
+// K8s Secrets must be valid DNS subdomain names (https://kubernetes.io/docs/concepts/configuration/secret/#overview-of-secrets)
+func formatK8sSecretName(value string) string {
+	if errs := kubeValidate.IsDNS1123Subdomain(value); len(errs) == 0 {
+		return value
+	}
+	return createValidSecretName(value)
+}
+
+var invalidDNS1123Chars = regexp.MustCompile("[^a-z0-9-]+")
+
+func createValidSecretName(value string) string {
+	result := strings.ToLower(value)
+	result = invalidDNS1123Chars.ReplaceAllString(result, "-")
+
+	if len(result) > kubeValidate.DNS1123SubdomainMaxLength {
+		result = result[0:kubeValidate.DNS1123SubdomainMaxLength]
+	}
+
+	// only alphanumeric characters allowed at beginning and end of value
+	return strings.Trim(result, "-")
+}
diff --git a/pkg/controller/onepassworditem/onepassworditem_test.go b/pkg/controller/onepassworditem/onepassworditem_test.go
index 2639f18..40108d8 100644
--- a/pkg/controller/onepassworditem/onepassworditem_test.go
+++ b/pkg/controller/onepassworditem/onepassworditem_test.go
@@ -210,6 +210,38 @@ var tests = []testReconcileItem{
 			passKey: password,
 		},
 	},
+	{
+		testName: "Secret from 1Password item with invalid K8s secret name",
+		customResource: &onepasswordv1.OnePasswordItem{
+			TypeMeta: metav1.TypeMeta{
+				Kind:       onePasswordItemKind,
+				APIVersion: onePasswordItemAPIVersion,
+			},
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      "!my sECReT it3m%",
+				Namespace: namespace,
+			},
+			Spec: onepasswordv1.OnePasswordItemSpec{
+				ItemPath: itemPath,
+			},
+		},
+		existingSecret: nil,
+		expectedError:  nil,
+		expectedResultSecret: &corev1.Secret{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      "my-secret-it3m",
+				Namespace: namespace,
+				Annotations: map[string]string{
+					op.VersionAnnotation: fmt.Sprint(version),
+				},
+			},
+			Data: expectedSecretData,
+		},
+		opItem: map[string]string{
+			userKey: username,
+			passKey: password,
+		},
+	},
 }
 
 func TestReconcileOnePasswordItem(t *testing.T) {
@@ -257,8 +289,8 @@ func TestReconcileOnePasswordItem(t *testing.T) {
 			// watched resource .
 			req := reconcile.Request{
 				NamespacedName: types.NamespacedName{
-					Name:      name,
-					Namespace: namespace,
+					Name:      testData.customResource.ObjectMeta.Name,
+					Namespace: testData.customResource.ObjectMeta.Namespace,
 				},
 			}
 			_, err := r.Reconcile(req)