diff --git a/pkg/helmexec/exec.go b/pkg/helmexec/exec.go
index c0eabe0e..49340b3e 100644
--- a/pkg/helmexec/exec.go
+++ b/pkg/helmexec/exec.go
@@ -423,9 +423,7 @@ func (helm *execer) ChartPull(chart string, flags ...string) error {
 	helmVersionConstraint, _ := semver.NewConstraint(">= 3.7.0")
 	var helmArgs []string
 	if helmVersionConstraint.Check(&helm.version) {
-		ociChartURLSplit := strings.Split(chart, ":")
-		ociChartURL := fmt.Sprintf("oci://%s", ociChartURLSplit[0])
-		ociChartTag := ociChartURLSplit[1]
+		ociChartURL, ociChartTag := resolveOciChart(chart)
 		tempDir, err := os.MkdirTemp("", "chart*")
 		if err != nil {
 			return err
@@ -447,9 +445,7 @@ func (helm *execer) ChartExport(chart string, path string, flags ...string) erro
 	helmVersionConstraint, _ := semver.NewConstraint(">= 3.7.0")
 	var helmArgs []string
 	if helmVersionConstraint.Check(&helm.version) {
-		ociChartURLSplit := strings.Split(chart, ":")
-		ociChartURL := fmt.Sprintf("oci://%s", ociChartURLSplit[0])
-		ociChartTag := ociChartURLSplit[1]
+		ociChartURL, ociChartTag := resolveOciChart(chart)
 		helmArgs = []string{"pull", ociChartURL, "--version", ociChartTag, "--untar"}
 	} else {
 		helmArgs = []string{"chart", "export", chart}
@@ -546,3 +542,21 @@ func (helm *execer) IsVersionAtLeast(versionStr string) bool {
 	ver := semver.MustParse(versionStr)
 	return helm.version.Equal(ver) || helm.version.GreaterThan(ver)
 }
+
+func resolveOciChart(ociChart string) (ociChartURL, ociChartTag string) {
+	var urlTagIndex int
+	// Get the last : index
+	// e.g.,
+	// 1. registry:443/helm-charts
+	// 2. registry/helm-charts:latest
+	// 3. registry:443/helm-charts:latest
+	if strings.LastIndex(ociChart, ":") <= strings.LastIndex(ociChart, "/") {
+		urlTagIndex = len(ociChart)
+		ociChartTag = ""
+	} else {
+		urlTagIndex = strings.LastIndex(ociChart, ":")
+		ociChartTag = ociChart[urlTagIndex+1:]
+	}
+	ociChartURL = fmt.Sprintf("oci://%s", ociChart[:urlTagIndex])
+	return ociChartURL, ociChartTag
+}
diff --git a/pkg/helmexec/exec_test.go b/pkg/helmexec/exec_test.go
index c399e663..4f6f1863 100644
--- a/pkg/helmexec/exec_test.go
+++ b/pkg/helmexec/exec_test.go
@@ -843,3 +843,42 @@ func Test_IsVersionAtLeast(t *testing.T) {
 		t.Error("helmexec.IsVersionAtLeast - 2.16.1 is atleast 3.2")
 	}
 }
+
+func Test_resolveOciChart(t *testing.T) {
+	tests := []struct {
+		name        string
+		chartPath   string
+		ociChartURL string
+		ociChartTag string
+	}{
+		{
+			name:        "normal",
+			chartPath:   "chart/nginx:v1",
+			ociChartURL: "oci://chart/nginx",
+			ociChartTag: "v1",
+		},
+		{
+			name:        "contains the port",
+			chartPath:   "chart:5000/nginx:v1",
+			ociChartURL: "oci://chart:5000/nginx",
+			ociChartTag: "v1",
+		},
+		{
+			name:        "no tag",
+			chartPath:   "chart:5000/nginx",
+			ociChartURL: "oci://chart:5000/nginx",
+			ociChartTag: "",
+		},
+	}
+	for i := range tests {
+		tt := tests[i]
+		t.Run(tt.name, func(t *testing.T) {
+			url, tag := resolveOciChart(tt.chartPath)
+			if tt.ociChartURL != url || tt.ociChartTag != tag {
+				actual := fmt.Sprintf("ociChartURL->%s  ociChartTag->%s", url, tag)
+				expected := fmt.Sprintf("ociChartURL->%s ociChartTag->%s", tt.ociChartURL, tt.ociChartTag)
+				t.Errorf("resolveOciChart()\nactual = %v\nexpect = %v", actual, expected)
+			}
+		})
+	}
+}