diff --git a/rag/persistency.go b/rag/persistency.go
index 9cabda9..9462fe8 100644
--- a/rag/persistency.go
+++ b/rag/persistency.go
@@ -19,7 +19,7 @@ import (
 
 // CollectionState represents the persistent state of a collection
 type CollectionState struct {
-	ExternalSources []ExternalSource           `json:"external_sources"`
+	ExternalSources []*ExternalSource          `json:"external_sources"`
 	Index           map[string][]engine.Result `json:"index"`
 }
 
@@ -29,7 +29,7 @@ type PersistentKB struct {
 	path         string
 	assetDir     string
 	maxChunkSize int
-	sources      []ExternalSource
+	sources      []*ExternalSource
 
 	index map[string][]engine.Result
 }
@@ -48,7 +48,7 @@ func loadDB(path string) (*CollectionState, error) {
 		if err := json.Unmarshal(data, &legacyFiles); err != nil {
 			return nil, err
 		}
-		state.ExternalSources = []ExternalSource{}
+		state.ExternalSources = []*ExternalSource{}
 		state.Index = map[string][]engine.Result{}
 	}
 
@@ -68,7 +68,7 @@ func NewPersistentCollectionKB(stateFile, assetDir string, store Engine, maxChun
 			Engine:       store,
 			assetDir:     assetDir,
 			maxChunkSize: maxChunkSize,
-			sources:      []ExternalSource{},
+			sources:      []*ExternalSource{},
 			index:        map[string][]engine.Result{},
 		}
 		persistentKB.Lock()
@@ -104,7 +104,7 @@ func (db *PersistentKB) Reset() error {
 	for f := range db.index {
 		os.Remove(filepath.Join(db.assetDir, f))
 	}
-	db.sources = []ExternalSource{}
+	db.sources = []*ExternalSource{}
 	db.index = map[string][]engine.Result{}
 	db.save()
 	db.Unlock()
@@ -368,14 +368,14 @@ func chunkFile(fpath string, maxchunksize int) ([]string, error) {
 }
 
 // GetExternalSources returns the list of external sources for this collection
-func (db *PersistentKB) GetExternalSources() []ExternalSource {
+func (db *PersistentKB) GetExternalSources() []*ExternalSource {
 	db.Lock()
 	defer db.Unlock()
 	return db.sources
 }
 
 // AddExternalSource adds an external source to the collection
-func (db *PersistentKB) AddExternalSource(source ExternalSource) error {
+func (db *PersistentKB) AddExternalSource(source *ExternalSource) error {
 	db.Lock()
 	defer db.Unlock()
 
diff --git a/rag/source_manager.go b/rag/source_manager.go
index 6bf014d..a201937 100644
--- a/rag/source_manager.go
+++ b/rag/source_manager.go
@@ -22,8 +22,8 @@ type ExternalSource struct {
 
 // SourceManager manages external sources for collections
 type SourceManager struct {
-	sources     map[string][]ExternalSource // collection name -> sources
-	collections map[string]*PersistentKB    // collection name -> collection
+	sources     map[string][]*ExternalSource // collection name -> sources
+	collections map[string]*PersistentKB     // collection name -> collection
 	mu          sync.RWMutex
 	ctx         context.Context
 	cancel      context.CancelFunc
@@ -33,7 +33,7 @@ type SourceManager struct {
 func NewSourceManager() *SourceManager {
 	ctx, cancel := context.WithCancel(context.Background())
 	return &SourceManager{
-		sources:     make(map[string][]ExternalSource),
+		sources:     make(map[string][]*ExternalSource),
 		collections: make(map[string]*PersistentKB),
 		ctx:         ctx,
 		cancel:      cancel,
@@ -72,14 +72,14 @@ func (sm *SourceManager) AddSource(collectionName, url string, updateInterval ti
 	}
 
 	// Add the source to the collection's persistent storage
-	if err := collection.AddExternalSource(source); err != nil {
+	if err := collection.AddExternalSource(&source); err != nil {
 		return err
 	}
 
-	sm.sources[collectionName] = append(sm.sources[collectionName], source)
+	sm.sources[collectionName] = append(sm.sources[collectionName], &source)
 
 	// Trigger an immediate update
-	go sm.updateSource(collectionName, source, collection)
+	go sm.updateSource(collectionName, &source, collection)
 
 	return nil
 }
@@ -116,7 +116,10 @@ func (sm *SourceManager) RemoveSource(collectionName, url string) error {
 }
 
 // updateSource updates a single source
-func (sm *SourceManager) updateSource(collectionName string, source ExternalSource, collection *PersistentKB) {
+func (sm *SourceManager) updateSource(collectionName string, source *ExternalSource, collection *PersistentKB) {
+
+	// update LastUpdate
+	source.LastUpdate = time.Now()
 
 	xlog.Info("Updating source", "url", source.URL)
 	content, err := sources.SourceRouter(source.URL)
diff --git a/test/e2e/persistency_test.go b/test/e2e/persistency_test.go
index 72a3279..82d8773 100644
--- a/test/e2e/persistency_test.go
+++ b/test/e2e/persistency_test.go
@@ -123,7 +123,7 @@ var _ = Describe("Persistency", func() {
 				LastUpdate:     time.Now(),
 			}
 
-			err := kb.AddExternalSource(source)
+			err := kb.AddExternalSource(&source)
 			Expect(err).To(BeNil())
 
 			sources := kb.GetExternalSources()
@@ -144,10 +144,10 @@ var _ = Describe("Persistency", func() {
 				LastUpdate:     time.Now(),
 			}
 
-			err := kb.AddExternalSource(source)
+			err := kb.AddExternalSource(&source)
 			Expect(err).To(BeNil())
 
-			err = kb.AddExternalSource(source)
+			err = kb.AddExternalSource(&source)
 			Expect(err).ToNot(BeNil())
 		})
 	})
diff --git a/test/e2e/source_manager_test.go b/test/e2e/source_manager_test.go
index b97b6dd..52cdf12 100644
--- a/test/e2e/source_manager_test.go
+++ b/test/e2e/source_manager_test.go
@@ -76,7 +76,7 @@ var _ = Describe("SourceManager", func() {
 				UpdateInterval: DefaultUpdateInterval,
 				LastUpdate:     time.Now(),
 			}
-			err := kb.AddExternalSource(source)
+			err := kb.AddExternalSource(&source)
 			Expect(err).To(BeNil())
 
 			// Register the collection
@@ -142,7 +142,7 @@ var _ = Describe("SourceManager", func() {
 			sourceManager.Start()
 
 			// Wait for at least one update cycle and verify the source was updated
-			Eventually(func() []rag.ExternalSource {
+			Eventually(func() []*rag.ExternalSource {
 				return kb.GetExternalSources()
 			}, TestTimeout, TestPollingInterval).Should(HaveLen(1))