diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 401f760f..6408a16c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,7 +16,7 @@ jobs:
     steps:
     - uses: actions/setup-go@v3
       with:
-        go-version: 1.19.x
+        go-version: 1.20.x
     - uses: actions/checkout@v2
       with:
         fetch-depth: 1
diff --git a/go.mod b/go.mod
index a36185aa..02cc211b 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/hyperledger/fabric-chaincode-go
 
-go 1.19
+go 1.20
 
 require (
 	github.com/golang/protobuf v1.5.2
diff --git a/shim/internal/config_test.go b/shim/internal/config_test.go
index 72d1899c..d9ece872 100644
--- a/shim/internal/config_test.go
+++ b/shim/internal/config_test.go
@@ -671,7 +671,7 @@ func TestTLSClientWithChaincodeServer(t *testing.T) {
 			clientCert:     []byte(clientCertPEM),
 			clientRootCert: []byte(clientRootPEM),
 			success:        false,
-			errMsg:         "transport: authentication handshake failed: x509: certificate signed by unknown authority",
+			errMsg:         "transport: authentication handshake failed: tls: failed to verify certificate: x509: certificate signed by unknown authority",
 			address:        "127.0.0.1:0",
 		},
 		{