diff --git a/server/resolvers/update_webhook.go b/server/resolvers/update_webhook.go
index 741669e..d9ea6b7 100644
--- a/server/resolvers/update_webhook.go
+++ b/server/resolvers/update_webhook.go
@@ -70,11 +70,7 @@ func UpdateWebhookResolver(ctx context.Context, params model.UpdateWebhookReques
 	}
 
 	if params.Headers != nil {
-		for key, val := range params.Headers {
-			webhook.Headers[key] = val
-		}
-
-		headerBytes, err := json.Marshal(webhook.Headers)
+		headerBytes, err := json.Marshal(params.Headers)
 		if err != nil {
 			log.Debug("failed to marshall headers: ", err)
 			return nil, err
diff --git a/server/test/resolvers_test.go b/server/test/resolvers_test.go
index 3c83b58..44feaff 100644
--- a/server/test/resolvers_test.go
+++ b/server/test/resolvers_test.go
@@ -13,7 +13,7 @@ import (
 
 func TestResolvers(t *testing.T) {
 	databases := map[string]string{
-		constants.DbTypeSqlite: "../../data.db",
+		constants.DbTypeSqlite: "../../test.db",
 		// constants.DbTypeArangodb: "http://localhost:8529",
 		// constants.DbTypeMongodb:  "mongodb://localhost:27017",
 		// constants.DbTypeScyllaDB: "127.0.0.1:9042",
diff --git a/server/test/update_webhook_test.go b/server/test/update_webhook_test.go
index aadb45b..cb96b72 100644
--- a/server/test/update_webhook_test.go
+++ b/server/test/update_webhook_test.go
@@ -27,7 +27,10 @@ func updateWebhookTest(t *testing.T, s TestSetup) {
 		webhook, err := db.Provider.GetWebhookByEventName(ctx, constants.UserDeletedWebhookEvent)
 		assert.NoError(t, err)
 		assert.NotNil(t, webhook)
-		webhook.Headers["x-new-test"] = "new-test"
+		// it should completely replace headers
+		webhook.Headers = map[string]interface{}{
+			"x-new-test": "test",
+		}
 
 		res, err := resolvers.UpdateWebhookResolver(ctx, model.UpdateWebhookRequest{
 			ID:      webhook.ID,
@@ -45,8 +48,11 @@ func updateWebhookTest(t *testing.T, s TestSetup) {
 		assert.Equal(t, webhook.ID, updatedWebhook.ID)
 		assert.Equal(t, refs.StringValue(webhook.EventName), refs.StringValue(updatedWebhook.EventName))
 		assert.Equal(t, refs.StringValue(webhook.Endpoint), refs.StringValue(updatedWebhook.Endpoint))
-		assert.Len(t, updatedWebhook.Headers, 2)
+		assert.Len(t, updatedWebhook.Headers, 1)
 		assert.False(t, refs.BoolValue(updatedWebhook.Enabled))
+		for key, val := range updatedWebhook.Headers {
+			assert.Equal(t, val, webhook.Headers[key])
+		}
 
 		res, err = resolvers.UpdateWebhookResolver(ctx, model.UpdateWebhookRequest{
 			ID:      webhook.ID,