diff --git a/examples/gift_card/aiken.lock b/examples/gift_card/aiken.lock
index d9ce1ad3..d76335d9 100644
--- a/examples/gift_card/aiken.lock
+++ b/examples/gift_card/aiken.lock
@@ -13,4 +13,4 @@ requirements = []
 source = "github"
 
 [etags]
-"aiken-lang/stdlib@main" = [{ secs_since_epoch = 1696594381, nanos_since_epoch = 842483000 }, "a721cf2738274f806efefb5a33c6ff9ae049476f0d45a42049b71793949f4d1d"]
+"aiken-lang/stdlib@main" = [{ secs_since_epoch = 1714410806, nanos_since_epoch = 706482000 }, "2a710731e0127ec3e21c6c3962a0254c98602e7428b33fc4fcaa67ab368ce1b1"]
diff --git a/examples/gift_card/validators/multi.ak b/examples/gift_card/validators/multi.ak
index 5d227961..de10d866 100644
--- a/examples/gift_card/validators/multi.ak
+++ b/examples/gift_card/validators/multi.ak
@@ -1,5 +1,5 @@
+use aiken/builtin
 use aiken/bytearray
-use aiken/cbor
 use aiken/dict
 use aiken/hash.{blake2b_256}
 use aiken/list
@@ -66,7 +66,7 @@ validator(creator: ByteArray) {
       Mint(total) -> {
         expect [input, ..] = inputs
         // Base is created from serializing a utxo ref being spent. Thus this guarantees a unique base
-        let base = cbor.serialise(input.output_reference)
+        let base = builtin.serialise_data(input.output_reference)
         // Create a list of expected token names
         let expected_minted_token_names =
           create_expected_minted_nfts(base, total, [])
diff --git a/examples/hello_world/aiken.lock b/examples/hello_world/aiken.lock
index 985d9775..2ea540a4 100644
--- a/examples/hello_world/aiken.lock
+++ b/examples/hello_world/aiken.lock
@@ -13,4 +13,4 @@ requirements = []
 source = "github"
 
 [etags]
-"aiken-lang/stdlib@main" = [{ secs_since_epoch = 1696594311, nanos_since_epoch = 857119000 }, "a721cf2738274f806efefb5a33c6ff9ae049476f0d45a42049b71793949f4d1d"]
+"aiken-lang/stdlib@main" = [{ secs_since_epoch = 1714410781, nanos_since_epoch = 118482000 }, "2a710731e0127ec3e21c6c3962a0254c98602e7428b33fc4fcaa67ab368ce1b1"]