diff --git a/go.mod b/go.mod
index 1669aef..428cbc2 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,8 @@
 module github.com/nabeken/aws-go-dynamodb/v2
 
-go 1.19
+go 1.21
+
+toolchain go1.23.0
 
 require (
 	github.com/aws/aws-sdk-go v1.55.5
@@ -9,7 +11,7 @@ require (
 	github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue v1.14.10
 	github.com/aws/aws-sdk-go-v2/feature/dynamodb/expression v1.7.32
 	github.com/aws/aws-sdk-go-v2/service/dynamodb v1.34.4
-	github.com/aws/smithy-go v1.20.3
+	github.com/aws/smithy-go v1.20.4
 	github.com/nabeken/aws-go-dynamodb v1.0.2
 	github.com/stretchr/testify v1.9.0
 )
diff --git a/go.sum b/go.sum
index 4bbb0bd..a67472b 100644
--- a/go.sum
+++ b/go.sum
@@ -21,8 +21,8 @@ github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.11.3 h1:dT3MqvG
 github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.11.3/go.mod h1:GlAeCkHwugxdHaueRr4nhPuY+WW+gR8UjlcqzPr1SPI=
 github.com/aws/aws-sdk-go-v2/service/internal/endpoint-discovery v1.9.16 h1:lhAX5f7KpgwyieXjbDnRTjPEUI0l3emSRyxXj1PXP8w=
 github.com/aws/aws-sdk-go-v2/service/internal/endpoint-discovery v1.9.16/go.mod h1:AblAlCwvi7Q/SFowvckgN+8M3uFPlopSYeLlbNDArhA=
-github.com/aws/smithy-go v1.20.3 h1:ryHwveWzPV5BIof6fyDvor6V3iUL7nTfiTKXHiW05nE=
-github.com/aws/smithy-go v1.20.3/go.mod h1:krry+ya/rV9RDcV/Q16kpu6ypI4K2czasz0NC3qS14E=
+github.com/aws/smithy-go v1.20.4 h1:2HK1zBdPgRbjFOHlfeQZfpC4r72MOb9bZkiFwggKO+4=
+github.com/aws/smithy-go v1.20.4/go.mod h1:irrKGvNn1InZwb2d7fkIRNucdfwR8R+Ts3wxYa/cJHg=
 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=