diff --git a/fuzz/go.mod b/fuzz/go.mod
index ae1534b..faa0908 100644
--- a/fuzz/go.mod
+++ b/fuzz/go.mod
@@ -1,6 +1,6 @@
 module github.com/filecoin-project/go-amt-ipld/fuzz
 
-go 1.20
+go 1.21
 
 replace github.com/filecoin-project/go-amt-ipld/v4 => ../
 
diff --git a/fuzz/go.sum b/fuzz/go.sum
index e6b4e2d..b72b8cd 100644
--- a/fuzz/go.sum
+++ b/fuzz/go.sum
@@ -1,6 +1,7 @@
 github.com/Julusian/godocdown v0.0.0-20170816220326-6d19f8ff2df8/go.mod h1:INZr5t32rG59/5xeltqoCJoNY7e5x/3xoY9WSWVWg74=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dvyukov/go-fuzz v0.0.0-20220726122315-1d375ef9f9f6 h1:sE4tvxWw01v7K3MAHwKF2UF3xQbgy23PRURntuV1CkU=
 github.com/dvyukov/go-fuzz v0.0.0-20220726122315-1d375ef9f9f6/go.mod h1:11Gm+ccJnvAhCNLlf5+cS9KjtbaD5I5zaZpFMsTHWTw=
 github.com/elazarl/go-bindata-assetfs v1.0.1 h1:m0kkaHRKEu7tUIUFVwhGGGYClXvyl4RE03qmvRTNfbw=
@@ -70,6 +71,7 @@ github.com/stephens2424/writerset v1.0.2/go.mod h1:aS2JhsMn6eA7e82oNmW4rfsgAOp9C
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/warpfork/go-wish v0.0.0-20180510122957-5ad1f5abf436 h1:qOpVTI+BrstcjTZLm2Yz/3sOnqkzj3FQoh0g+E5s3Gc=
 github.com/warpfork/go-wish v0.0.0-20180510122957-5ad1f5abf436/go.mod h1:x6AKhvSSexNrVSrViXSHUEbICjmGXhtgABaHIySUSGw=
 github.com/whyrusleeping/cbor-gen v0.0.0-20200123233031-1cdf64d27158/go.mod h1:Xj/M2wWU+QdTdRbu/L/1dIZY8/Wb2K9pAhtroQuxJJI=
@@ -101,3 +103,4 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/yaml.v3 v3.0.0 h1:hjy8E9ON/egN1tAYqKb61G10WtihqetD4sz2H+8nIeA=
+gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/go.mod b/go.mod
index 5f9dd9d..47d5312 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/filecoin-project/go-amt-ipld/v4
 
-go 1.20
+go 1.21
 
 require (
 	github.com/ipfs/go-block-format v0.0.2