diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 12a23ea61..944f2b2f1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go_version: ["1.18.1", "1.17.6", "1.16.5"]
+        go_version: ["1.20", "1.19", "1.18"]
     steps:
       - uses: actions/checkout@v3
       - name: Setup Go
diff --git a/README.md b/README.md
index ce6d3de28..8bccfa192 100644
--- a/README.md
+++ b/README.md
@@ -348,7 +348,7 @@ To update Testify to the latest version, use `go get -u github.com/stretchr/test
 Supported go versions
 ==================
 
-We currently support the most recent major Go versions from 1.13 onward.
+We currently support the most recent major Go versions from 1.18 onward.
 
 ------
 
diff --git a/assert/assertions.go b/assert/assertions.go
index fe2d29754..5bd624722 100644
--- a/assert/assertions.go
+++ b/assert/assertions.go
@@ -91,7 +91,7 @@ func copyExportedFields(expected interface{}) interface{} {
 		result := reflect.New(expectedType).Elem()
 		for i := 0; i < expectedType.NumField(); i++ {
 			field := expectedType.Field(i)
-			isExported := field.PkgPath == "" // should use field.IsExported() but it's not available in Go 1.16.5
+			isExported := field.IsExported()
 			if isExported {
 				fieldValue := expectedValue.Field(i)
 				if isNil(fieldValue) || isNil(fieldValue.Interface()) {
diff --git a/go.mod b/go.mod
index 3fe9bab67..bddefac03 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/stretchr/testify
 
-go 1.13
+go 1.20
 
 require (
 	github.com/davecgh/go-spew v1.1.1