diff --git a/pkg/argocd/argocd.go b/pkg/argocd/argocd.go
index 5847ee57..e2868b69 100644
--- a/pkg/argocd/argocd.go
+++ b/pkg/argocd/argocd.go
@@ -503,6 +503,12 @@ func GetImagesFromApplication(app *v1alpha1.Application) image.ContainerImageLis
 	return images
 }
 
+func GetImagesFromImageList(app *v1alpha1.Application) image.ContainerImageList {
+	images := make(image.ContainerImageList, 0)
+	images = append(images, *parseImageList(app.Annotations)...)
+	return images
+}
+
 // GetApplicationTypeByName first retrieves application with given appName and
 // returns its application type
 func GetApplicationTypeByName(client ArgoCD, appName string) (ApplicationType, error) {
diff --git a/pkg/argocd/update.go b/pkg/argocd/update.go
index 855bbdd0..aba999b4 100644
--- a/pkg/argocd/update.go
+++ b/pkg/argocd/update.go
@@ -416,15 +416,15 @@ func marshalParamsOverride(app *v1alpha1.Application, originalData []byte) ([]by
 		}
 
 		if strings.HasPrefix(app.Annotations[common.WriteBackTargetAnnotation], common.HelmPrefix) {
-			images := GetImagesFromApplication(app)
+			images := GetImagesFromImageList(app)
 
 			for _, c := range images {
-				helmAnnotationParamName, helmAnnotationParamVersion := getHelmParamNamesFromAnnotation(app.Annotations, c.ImageName)
+				helmAnnotationParamName, helmAnnotationParamVersion := getHelmParamNamesFromAnnotation(app.Annotations, c.ImageAlias)
 				if helmAnnotationParamName == "" {
-					return nil, fmt.Errorf("could not find an image-name annotation for image %s", c.ImageName)
+					return nil, fmt.Errorf("could not find an image-name annotation for image %s", c.ImageAlias)
 				}
 				if helmAnnotationParamVersion == "" {
-					return nil, fmt.Errorf("could not find an image-tag annotation for image %s", c.ImageName)
+					return nil, fmt.Errorf("could not find an image-tag annotation for image %s", c.ImageAlias)
 				}
 
 				helmParamName := getHelmParam(appSource.Helm.Parameters, helmAnnotationParamName)
@@ -437,11 +437,16 @@ func marshalParamsOverride(app *v1alpha1.Application, originalData []byte) ([]by
 					return nil, fmt.Errorf("%s parameter not found", helmAnnotationParamVersion)
 				}
 
-				// Build string with YAML format to merge with originalData values
-				helmValues := fmt.Sprintf("%s: %s\n%s: %s", helmAnnotationParamName, helmParamName.Value, helmAnnotationParamVersion, helmParamVersion.Value)
-
 				var mergedParams *conflate.Conflate
-				mergedParams, err = conflate.FromData(originalData, []byte(helmValues))
+				mergedParams, err = conflate.FromData(originalData)
+				if err != nil {
+					return nil, err
+				}
+
+				err = mergedParams.AddGo(
+					dotToObj(helmAnnotationParamName, helmParamName.Value),
+					dotToObj(helmAnnotationParamVersion, helmParamVersion.Value),
+				)
 				if err != nil {
 					return nil, err
 				}
@@ -481,6 +486,24 @@ func marshalParamsOverride(app *v1alpha1.Application, originalData []byte) ([]by
 	return override, nil
 }
 
+func dotToObj(key string, value string) map[string]interface{} {
+	keys := strings.Split(key, ".")
+	obj := make(map[string]interface{})
+
+	current := obj
+	for i, k := range keys {
+		if i == len(keys)-1 {
+			current[k] = value
+		} else {
+			currentMap := make(map[string]interface{})
+			current[k] = currentMap
+			current = currentMap
+		}
+	}
+
+	return obj
+}
+
 func mergeHelmOverride(t *helmOverride, o *helmOverride) {
 	for _, param := range o.Helm.Parameters {
 		idx := slices.IndexFunc(t.Helm.Parameters, func(tp v1alpha1.HelmParameter) bool { return tp.Name == param.Name })