diff --git a/go.mod b/go.mod
index 6911a9a..aab234e 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/bitcoin-sv/spv-wallet-go-client
 go 1.22.5
 
 require (
-	github.com/bitcoin-sv/go-sdk v1.1.9
+	github.com/bitcoin-sv/go-sdk v1.1.16
 	github.com/bitcoin-sv/spv-wallet/models v1.0.0-beta.39
 	github.com/pquerna/otp v1.4.0
 	github.com/stretchr/testify v1.10.0
diff --git a/go.sum b/go.sum
index 09d6349..178459a 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-github.com/bitcoin-sv/go-sdk v1.1.9 h1:N/LlZUMHNYKjEBuY72c3XSlzUI/q7IN34R0p6J0Qtjc=
-github.com/bitcoin-sv/go-sdk v1.1.9/go.mod h1:NOAkJLbjqKOLuxJmb9ABG86ExTZp4HS8+iygiDIUps4=
+github.com/bitcoin-sv/go-sdk v1.1.16 h1:n2X0RiENFGD/1fQ/1y6osbostRB7I/xq9I7tcIKcCPY=
+github.com/bitcoin-sv/go-sdk v1.1.16/go.mod h1:3CsNdEDBwB+SIv6UBcJPC9bTvPqxQvg3GULt7wsuL58=
 github.com/bitcoin-sv/spv-wallet/models v1.0.0-beta.39 h1:qo74o72mcdj7AYJoCq7RG3enHJiqtbkFEY9uXvEEG2M=
 github.com/bitcoin-sv/spv-wallet/models v1.0.0-beta.39/go.mod h1:UdY5AGsO9IomUEYSPilcSY+3BTQRJswdfZNveLt6LZQ=
 github.com/boombuler/barcode v1.0.1-0.20190219062509-6c824513bacc h1:biVzkmvwrH8WK8raXaxBx6fRVTlJILwEwQGL1I/ByEI=
diff --git a/internal/auth/auth.go b/internal/auth/auth.go
index 5aa288f..753cc92 100644
--- a/internal/auth/auth.go
+++ b/internal/auth/auth.go
@@ -95,7 +95,7 @@ func createSignatureAccessKey(privateKeyHex, bodyString string) (payload *models
 
 	// Get the AccessKey
 	payload = new(models.AuthPayload)
-	payload.AccessKey = hex.EncodeToString(publicKey.SerializeCompressed())
+	payload.AccessKey = hex.EncodeToString(publicKey.Compressed())
 
 	// auth_nonce is a random unique string to seed the signing message
 	// this can be checked server side to make sure the request is not being replayed
diff --git a/internal/auth/authenitcators.go b/internal/auth/authenitcators.go
index 0bf9de4..53e2f23 100644
--- a/internal/auth/authenitcators.go
+++ b/internal/auth/authenitcators.go
@@ -71,7 +71,7 @@ func (a *AccessKeyAuthenticator) privKeyHex() string {
 }
 
 func (a *AccessKeyAuthenticator) pubKeyHex() string {
-	return hex.EncodeToString(a.pub.SerializeCompressed())
+	return hex.EncodeToString(a.pub.Compressed())
 }
 
 func bodyString(r *resty.Request) string {
diff --git a/internal/testutils/spvwallettest.go b/internal/testutils/spvwallettest.go
index 2807050..fec7aba 100644
--- a/internal/testutils/spvwallettest.go
+++ b/internal/testutils/spvwallettest.go
@@ -78,7 +78,7 @@ func MockPKI(t *testing.T, xpub string) string {
 		t.Fatalf("test helper - ec public key from xpub: %s", err)
 	}
 
-	return hex.EncodeToString(pubKey.SerializeCompressed())
+	return hex.EncodeToString(pubKey.Compressed())
 }
 
 func ParseTime(t *testing.T, s string) time.Time {