diff --git a/sdk/addressable_loader.go b/sdk/addressable_loader.go
index c0761b3..cf686ec 100644
--- a/sdk/addressable_loader.go
+++ b/sdk/addressable_loader.go
@@ -23,6 +23,7 @@ const (
 )
 
 func (sys *System) initializeAddressableDataloaders() {
+	sys.addressableLoaders = make([]*dataloader.Loader[string, []*nostr.Event], 4)
 	sys.addressableLoaders[kind_30000] = sys.createAddressableDataloader(30000)
 	sys.addressableLoaders[kind_30002] = sys.createAddressableDataloader(30002)
 	sys.addressableLoaders[kind_30015] = sys.createAddressableDataloader(30015)
diff --git a/sdk/replaceable_loader.go b/sdk/replaceable_loader.go
index e5f59ac..19aa3be 100644
--- a/sdk/replaceable_loader.go
+++ b/sdk/replaceable_loader.go
@@ -32,6 +32,7 @@ const (
 type EventResult dataloader.Result[*nostr.Event]
 
 func (sys *System) initializeReplaceableDataloaders() {
+	sys.replaceableLoaders = make([]*dataloader.Loader[string, *nostr.Event], 12)
 	sys.replaceableLoaders[kind_0] = sys.createReplaceableDataloader(0)
 	sys.replaceableLoaders[kind_3] = sys.createReplaceableDataloader(3)
 	sys.replaceableLoaders[kind_10000] = sys.createReplaceableDataloader(10000)