diff --git a/plugins/notifiers/client.go b/plugins/notifiers/client.go
index 683c0b02c..eb053e2cd 100644
--- a/plugins/notifiers/client.go
+++ b/plugins/notifiers/client.go
@@ -2,6 +2,8 @@ package notifiers
 
 import (
 	"errors"
+	"fmt"
+	"github.com/mitchellh/mapstructure"
 	"net/http"
 	"time"
 
@@ -17,12 +19,20 @@ const (
 	ProviderTypeSlack = "slack"
 )
 
+// slackConfig is a map of workspace name to config
+type slackConfig map[string]interface{}
+
+func (c slackConfig) Decode(v interface{}) error {
+	return mapstructure.Decode(c, v)
+}
+
 type Config struct {
 	Provider string `mapstructure:"provider" validate:"omitempty,oneof=slack"`
 
 	// slack
-	AccessToken string                 `mapstructure:"access_token" validate:"required_without=Workspaces"`
-	Workspaces  []slack.SlackWorkspace `mapstructure:"workspaces" validate:"required_without=AccessToken,dive"`
+	AccessToken string `mapstructure:"access_token" validate:"required_without=slackConfig"`
+	//Workspaces      []slack.SlackWorkspace `mapstructure:"workspaces" validate:"required_without=AccessToken,dive"`
+	slackConfig slackConfig `mapstructure:"workspace_config" validate:"omitempty,dive"`
 
 	// custom messages
 	Messages domain.NotificationMessages
@@ -46,11 +56,11 @@ func NewClient(config *Config) (Client, error) {
 func NewSlackConfig(config *Config) (*slack.Config, error) {
 
 	// validation
-	if config.AccessToken == "" && len(config.Workspaces) == 0 {
-		return nil, errors.New("slack access token or workspaces must be provided")
+	if config.AccessToken == "" && config.slackConfig == nil {
+		return nil, errors.New("slack access token or workSpaceConfig must be provided")
 	}
-	if config.AccessToken != "" && len(config.Workspaces) != 0 {
-		return nil, errors.New("slack access token and workspaces cannot be provided at the same time")
+	if config.AccessToken != "" && config.slackConfig != nil {
+		return nil, errors.New("slack access token and workSpaceConfig cannot be provided at the same time")
 	}
 
 	var slackConfig *slack.Config
@@ -69,8 +79,13 @@ func NewSlackConfig(config *Config) (*slack.Config, error) {
 		return slackConfig, nil
 	}
 
+	var workSpaceConfig slack.WorkSpaceConfig
+	if err := config.slackConfig.Decode(&workSpaceConfig); err != nil {
+		return nil, fmt.Errorf("invalid slack workspace config: %w", err)
+	}
+
 	slackConfig = &slack.Config{
-		Workspaces: config.Workspaces,
+		Workspaces: workSpaceConfig.Workspaces,
 		Messages:   config.Messages,
 	}
 
diff --git a/plugins/notifiers/client_test.go b/plugins/notifiers/client_test.go
index c30cf12bd..7f13f9907 100644
--- a/plugins/notifiers/client_test.go
+++ b/plugins/notifiers/client_test.go
@@ -31,11 +31,13 @@ func TestNewSlackConfig(t *testing.T) {
 				config: &Config{
 					Provider:    ProviderTypeSlack,
 					AccessToken: "foo",
-					Workspaces: []slack.SlackWorkspace{
-						{
-							WorkspaceName: "default",
-							AccessToken:   "bar",
-							Criteria:      "1==1",
+					slackConfig: slackConfig{
+						"workspaces": []slack.SlackWorkspace{
+							{
+								WorkspaceName: "default",
+								AccessToken:   "bar",
+								Criteria:      "1==1",
+							},
 						},
 					},
 				},
@@ -65,16 +67,18 @@ func TestNewSlackConfig(t *testing.T) {
 			args: args{
 				config: &Config{
 					Provider: ProviderTypeSlack,
-					Workspaces: []slack.SlackWorkspace{
-						{
-							WorkspaceName: "A",
-							AccessToken:   "foo",
-							Criteria:      "$email contains '@abc'",
-						},
-						{
-							WorkspaceName: "B",
-							AccessToken:   "bar",
-							Criteria:      "$email contains '@xyz'",
+					slackConfig: slackConfig{
+						"workspaces": []slack.SlackWorkspace{
+							{
+								WorkspaceName: "A",
+								AccessToken:   "foo",
+								Criteria:      "$email contains '@abc'",
+							},
+							{
+								WorkspaceName: "B",
+								AccessToken:   "bar",
+								Criteria:      "$email contains '@xyz'",
+							},
 						},
 					},
 				},
diff --git a/plugins/notifiers/slack/client.go b/plugins/notifiers/slack/client.go
index 3a11c795e..60a8f2c07 100644
--- a/plugins/notifiers/slack/client.go
+++ b/plugins/notifiers/slack/client.go
@@ -34,6 +34,10 @@ type userResponse struct {
 	Error string `json:"error"`
 }
 
+type WorkSpaceConfig struct {
+	Workspaces []SlackWorkspace `mapstructure:"workspaces"`
+}
+
 type SlackWorkspace struct {
 	WorkspaceName string `mapstructure:"workspace" validate:"required"`
 	AccessToken   string `mapstructure:"access_token" validate:"required"`