diff --git a/filter_easyjson.go b/filter_easyjson.go
index f9e7cc8..690d3a9 100644
--- a/filter_easyjson.go
+++ b/filter_easyjson.go
@@ -39,7 +39,7 @@ func easyjsonDecodeFilter(in *jlexer.Lexer, out *Filter) {
 				out.IDs = (out.IDs)[:0]
 			}
 			for !in.IsDelim(']') {
-				id := [32]byte{}
+				id := ID{}
 				b := in.UnsafeBytes()
 				if len(b) == 64 {
 					hex.Decode(id[:], b)
@@ -76,7 +76,7 @@ func easyjsonDecodeFilter(in *jlexer.Lexer, out *Filter) {
 				out.Authors = (out.Authors)[:0]
 			}
 			for !in.IsDelim(']') {
-				pk := [32]byte{}
+				pk := PubKey{}
 				b := in.UnsafeBytes()
 				if len(b) == 64 {
 					hex.Decode(pk[:], b)
diff --git a/khatru/README.md b/khatru/README.md
index a559ff1..a8c190a 100644
--- a/khatru/README.md
+++ b/khatru/README.md
@@ -64,9 +64,9 @@ func main() {
 	relay.RejectEvent = append(relay.RejectEvent,
 		// built-in policies
 		policies.ValidateKind,
+		policies.RejectUnprefixedNostrReferences,
 
 		// define your own policies
-		policies.PreventLargeTags(100),
 		func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
 			if event.PubKey == nostr.MustPubKeyFromHex("fa984bd7dbb282f07e16e7ae87b26a2a7b9b90b7246a44771f0cf5ae58018f52") {
 				return true, "we don't allow this person to write here"
diff --git a/khatru/examples/readme-demo/main.go b/khatru/examples/readme-demo/main.go
index 27f7e59..f9503c2 100644
--- a/khatru/examples/readme-demo/main.go
+++ b/khatru/examples/readme-demo/main.go
@@ -50,7 +50,7 @@ func main() {
 	relay.OnEvent = policies.SeqEvent(
 		// built-in policies
 		policies.ValidateKind,
-		policies.PreventLargeTags(100),
+		policies.RejectUnprefixedNostrReferences,
 
 		// define your own policies
 		func(ctx context.Context, event nostr.Event) (reject bool, msg string) {
diff --git a/signature.go b/signature.go
index 29b6cd1..d2db38e 100644
--- a/signature.go
+++ b/signature.go
@@ -42,7 +42,7 @@ func (evt *Event) Sign(secretKey [32]byte) error {
 
 	sk, pk := btcec.PrivKeyFromBytes(secretKey[:])
 	pkBytes := pk.SerializeCompressed()[1:]
-	evt.PubKey = [32]byte(pkBytes)
+	evt.PubKey = PubKey(pkBytes)
 
 	h := sha256.Sum256(evt.Serialize())
 	sig, err := schnorr.Sign(sk, h[:], schnorr.FastSign())