diff --git a/apptrust/commands/flags.go b/apptrust/commands/flags.go
index 49d6a86..27c7788 100644
--- a/apptrust/commands/flags.go
+++ b/apptrust/commands/flags.go
@@ -50,7 +50,7 @@ const (
 	SourceTypeReleaseBundlesFlag      = "source-type-release-bundles"
 	SourceTypeApplicationVersionsFlag = "source-type-application-versions"
 	PropertiesFlag                    = "properties"
-	DeletePropertyFlag                = "delete-property"
+	DeletePropertiesFlag              = "delete-properties"
 )
 
 // Flag keys mapped to their corresponding components.Flag definition.
@@ -83,7 +83,7 @@ var flagsMap = map[string]components.Flag{
 	SourceTypeReleaseBundlesFlag:      components.NewStringFlag(SourceTypeReleaseBundlesFlag, "List of semicolon-separated (;) release bundles in the form of 'name=releaseBundleName1, version=version1; name=releaseBundleName2, version=version2' to be included in the new version.", func(f *components.StringFlag) { f.Mandatory = false }),
 	SourceTypeApplicationVersionsFlag: components.NewStringFlag(SourceTypeApplicationVersionsFlag, "List of semicolon-separated (;) application versions in the form of 'application-key=app1, version=version1; application-key=app2, version=version2' to be included in the new version.", func(f *components.StringFlag) { f.Mandatory = false }),
 	PropertiesFlag:                    components.NewStringFlag(PropertiesFlag, "Sets or updates custom properties for the application version in format 'key1=value1[,value2,...];key2=value3[,value4,...]'", func(f *components.StringFlag) { f.Mandatory = false }),
-	DeletePropertyFlag:                components.NewStringFlag(DeletePropertyFlag, "Remove a property key and all its values", func(f *components.StringFlag) { f.Mandatory = false }),
+	DeletePropertiesFlag:              components.NewStringFlag(DeletePropertiesFlag, "Remove a property key and all its values", func(f *components.StringFlag) { f.Mandatory = false }),
 }
 
 var commandFlags = map[string][]string{
@@ -142,7 +142,7 @@ var commandFlags = map[string][]string{
 		serverId,
 		TagFlag,
 		PropertiesFlag,
-		DeletePropertyFlag,
+		DeletePropertiesFlag,
 	},
 
 	PackageBind: {
diff --git a/apptrust/commands/version/update_app_version_cmd.go b/apptrust/commands/version/update_app_version_cmd.go
index abebb18..d612443 100644
--- a/apptrust/commands/version/update_app_version_cmd.go
+++ b/apptrust/commands/version/update_app_version_cmd.go
@@ -101,8 +101,8 @@ func (uv *updateAppVersionCommand) buildRequestPayload(ctx *components.Context)
 	}
 
 	// Handle delete properties
-	if ctx.IsFlagSet(commands.DeletePropertyFlag) {
-		deleteProps := utils.ParseSliceFlag(ctx.GetStringFlagValue(commands.DeletePropertyFlag))
+	if ctx.IsFlagSet(commands.DeletePropertiesFlag) {
+		deleteProps := utils.ParseSliceFlag(ctx.GetStringFlagValue(commands.DeletePropertiesFlag))
 		request.DeleteProperties = deleteProps
 	}
 
diff --git a/apptrust/commands/version/update_app_version_cmd_test.go b/apptrust/commands/version/update_app_version_cmd_test.go
index 948cd26..63e8657 100644
--- a/apptrust/commands/version/update_app_version_cmd_test.go
+++ b/apptrust/commands/version/update_app_version_cmd_test.go
@@ -132,7 +132,7 @@ func TestUpdateAppVersionCommand_FlagsSuite(t *testing.T) {
 			name: "delete properties only",
 			ctxSetup: func(ctx *components.Context) {
 				ctx.Arguments = []string{"app-key", "1.0.0"}
-				ctx.AddStringFlag(commands.DeletePropertyFlag, "legacy_param;toBeDeleted")
+				ctx.AddStringFlag(commands.DeletePropertiesFlag, "legacy_param;toBeDeleted")
 			},
 			expectsPayload: &model.UpdateAppVersionRequest{
 				DeleteProperties: []string{"legacy_param", "toBeDeleted"},
@@ -156,7 +156,7 @@ func TestUpdateAppVersionCommand_FlagsSuite(t *testing.T) {
 				ctx.Arguments = []string{"app-key", "1.0.0"}
 				ctx.AddStringFlag(commands.TagFlag, "release/1.2.3")
 				ctx.AddStringFlag(commands.PropertiesFlag, "status=rc,validated")
-				ctx.AddStringFlag(commands.DeletePropertyFlag, "old_param")
+				ctx.AddStringFlag(commands.DeletePropertiesFlag, "old_param")
 			},
 			expectsPayload: &model.UpdateAppVersionRequest{
 				Tag: "release/1.2.3",
diff --git a/apptrust/commands/version/version_utils.go b/apptrust/commands/version/version_utils.go
index a14c2b0..27c4c8b 100644
--- a/apptrust/commands/version/version_utils.go
+++ b/apptrust/commands/version/version_utils.go
@@ -39,13 +39,21 @@ func BuildPromotionParams(ctx *components.Context) (string, []string, []string,
 }
 
 // ParseArtifactProps extracts artifact properties from command context
-func ParseArtifactProps(ctx *components.Context) (map[string]string, error) {
+func ParseArtifactProps(ctx *components.Context) ([]model.ArtifactProperty, error) {
 	if propsStr := ctx.GetStringFlagValue(commands.PropsFlag); propsStr != "" {
-		props, err := utils.ParseMapFlag(propsStr)
+		props, err := utils.ParseListPropertiesFlag(propsStr)
 		if err != nil {
 			return nil, errorutils.CheckErrorf("failed to parse properties: %s", err.Error())
 		}
-		return props, nil
+
+		var artifactProps []model.ArtifactProperty
+		for key, values := range props {
+			artifactProps = append(artifactProps, model.ArtifactProperty{
+				Key:    key,
+				Values: values,
+			})
+		}
+		return artifactProps, nil
 	}
 	return nil, nil
 }
diff --git a/apptrust/model/promote_app_version_request.go b/apptrust/model/promote_app_version_request.go
index 4fe8aba..934f48a 100644
--- a/apptrust/model/promote_app_version_request.go
+++ b/apptrust/model/promote_app_version_request.go
@@ -15,10 +15,15 @@ var PromotionTypeValues = []string{
 }
 
 type CommonPromoteAppVersion struct {
-	PromotionType                string            `json:"promotion_type,omitempty"`
-	IncludedRepositoryKeys       []string          `json:"included_repository_keys,omitempty"`
-	ExcludedRepositoryKeys       []string          `json:"excluded_repository_keys,omitempty"`
-	ArtifactAdditionalProperties map[string]string `json:"artifact_additional_properties,omitempty"`
+	PromotionType                string             `json:"promotion_type,omitempty"`
+	IncludedRepositoryKeys       []string           `json:"included_repository_keys,omitempty"`
+	ExcludedRepositoryKeys       []string           `json:"excluded_repository_keys,omitempty"`
+	ArtifactAdditionalProperties []ArtifactProperty `json:"artifact_additional_properties,omitempty"`
+}
+
+type ArtifactProperty struct {
+	Key    string   `json:"key"`
+	Values []string `json:"values"`
 }
 
 type PromoteAppVersionRequest struct {
diff --git a/apptrust/model/release_app_version_request.go b/apptrust/model/release_app_version_request.go
index f0887f2..2547f0b 100644
--- a/apptrust/model/release_app_version_request.go
+++ b/apptrust/model/release_app_version_request.go
@@ -13,7 +13,7 @@ func NewReleaseAppVersionRequest(
 	promotionType string,
 	includedRepositoryKeys []string,
 	excludedRepositoryKeys []string,
-	artifactProperties map[string]string,
+	artifactProperties []ArtifactProperty,
 ) *ReleaseAppVersionRequest {
 	return &ReleaseAppVersionRequest{
 		CommonPromoteAppVersion: CommonPromoteAppVersion{
diff --git a/apptrust/service/versions/version_service_test.go b/apptrust/service/versions/version_service_test.go
index 7ff2221..82ad9db 100644
--- a/apptrust/service/versions/version_service_test.go
+++ b/apptrust/service/versions/version_service_test.go
@@ -212,7 +212,7 @@ func TestReleaseAppVersion(t *testing.T) {
 				model.PromotionTypeCopy,
 				[]string{"repo1", "repo2"},
 				[]string{"repo3"},
-				map[string]string{"key1": "value1"},
+				[]model.ArtifactProperty{{Key: "key1", Values: []string{"value1"}}},
 			),
 			sync:             true,
 			expectedEndpoint: "/v1/applications/test-app/versions/1.0.0/release",
@@ -229,7 +229,7 @@ func TestReleaseAppVersion(t *testing.T) {
 				model.PromotionTypeCopy,
 				[]string{"repo1", "repo2"},
 				[]string{"repo3"},
-				map[string]string{"key1": "value1"},
+				[]model.ArtifactProperty{{Key: "key1", Values: []string{"value1"}}},
 			),
 			sync:             false,
 			expectedEndpoint: "/v1/applications/test-app/versions/1.0.0/release",