diff --git a/cache.go b/cache.go
index 4050281..f6c7d4f 100644
--- a/cache.go
+++ b/cache.go
@@ -127,6 +127,15 @@ func (c *Cache) Get(key string) ([]byte, bool) {
 	return val, true
 }
 
+func (c *Cache) GetJSON(key string, recv any) bool {
+	b, ok := c.Get(key)
+	if !ok {
+		return ok
+	}
+	json.Unmarshal(b, recv)
+	return true
+}
+
 func (c *Cache) Set(key string, value []byte) {
 	err := c.DB.Update(func(txn *badger.Txn) error {
 		return txn.Set([]byte(key), value)
@@ -136,6 +145,11 @@ func (c *Cache) Set(key string, value []byte) {
 	}
 }
 
+func (c *Cache) SetJSON(key string, value any) {
+	j, _ := json.Marshal(value)
+	c.Set(key, j)
+}
+
 func (c *Cache) SetWithTTL(key string, value []byte, ttl time.Duration) {
 	err := c.DB.Update(func(txn *badger.Txn) error {
 		return txn.Set([]byte(key), value)
@@ -146,3 +160,8 @@ func (c *Cache) SetWithTTL(key string, value []byte, ttl time.Duration) {
 	c.expiringKeys[key] = time.Now().Add(ttl)
 	c.refreshTimers <- struct{}{}
 }
+
+func (c *Cache) SetJSONWithTTL(key string, value any, ttl time.Duration) {
+	j, _ := json.Marshal(value)
+	c.SetWithTTL(key, j, ttl)
+}
diff --git a/nostr.go b/nostr.go
index 47acc00..dd795c9 100644
--- a/nostr.go
+++ b/nostr.go
@@ -100,14 +100,8 @@ func getEvent(ctx context.Context, code string) (*nostr.Event, error) {
 
 	if author != "" {
 		// fetch relays for author
-		ctx, cancel := context.WithTimeout(ctx, time.Millisecond*1500)
-		defer cancel()
-
-		for _, relay := range sdk.FetchRelaysForPubkey(ctx, pool, author, relays...) {
-			if relay.Outbox {
-				relays = append(relays, relay.URL)
-			}
-		}
+		authorRelays := relaysForPubkey(ctx, author, relays...)
+		relays = append(relays, authorRelays...)
 	}
 
 	for len(relays) < 5 {
@@ -136,17 +130,9 @@ func getLastNotes(ctx context.Context, code string) []*nostr.Event {
 	if pp == nil {
 		return nil
 	}
-	relays := pp.Relays
 
-	{
-		ctx, cancel := context.WithTimeout(ctx, time.Millisecond*1500)
-		defer cancel()
-		for _, relay := range sdk.FetchRelaysForPubkey(ctx, pool, pp.PublicKey, pp.Relays...) {
-			if relay.Outbox {
-				relays = append(relays, relay.URL)
-			}
-		}
-	}
+	pubkeyRelays := relaysForPubkey(ctx, pp.PublicKey, pp.Relays...)
+	relays := append(pp.Relays, pubkeyRelays...)
 
 	ctx, cancel := context.WithTimeout(ctx, time.Second*4)
 	defer cancel()
@@ -166,3 +152,18 @@ func getLastNotes(ctx context.Context, code string) []*nostr.Event {
 	}
 	return lastNotes
 }
+
+func relaysForPubkey(ctx context.Context, pubkey string, extraRelays ...string) []string {
+	pubkeyRelays := make([]string, 12)
+	if ok := cache.GetJSON("io:"+pubkey, &pubkeyRelays); !ok {
+		ctx, cancel := context.WithTimeout(ctx, time.Millisecond*1500)
+		for _, relay := range sdk.FetchRelaysForPubkey(ctx, pool, pubkey, extraRelays...) {
+			if relay.Outbox {
+				pubkeyRelays = append(pubkeyRelays, relay.URL)
+			}
+		}
+		cancel()
+		cache.SetJSONWithTTL("io:"+pubkey, pubkeyRelays, time.Hour*24*7)
+	}
+	return pubkeyRelays
+}
diff --git a/render.go b/render.go
index 76c4ada..a28cfa2 100644
--- a/render.go
+++ b/render.go
@@ -71,15 +71,12 @@ func render(w http.ResponseWriter, r *http.Request) {
 		key := "ln:" + event.PubKey
 		var lastNotes []*nostr.Event
 
-		if b, ok := cache.Get(key); ok {
-			json.Unmarshal(b, &lastNotes)
-		} else {
+		if ok := cache.GetJSON(key, &lastNotes); !ok {
 			ctx, cancel := context.WithTimeout(r.Context(), time.Second*4)
 			lastNotes = getLastNotes(ctx, code)
 			cancel()
 			if !s.DisableCache {
-				b, _ := json.Marshal(lastNotes)
-				cache.SetWithTTL(key, b, time.Hour*24)
+				cache.SetJSONWithTTL(key, lastNotes, time.Hour*24)
 			}
 		}