diff --git a/go.mod b/go.mod
index a545add..8307543 100644
--- a/go.mod
+++ b/go.mod
@@ -4,8 +4,12 @@ go 1.21.0
 
 require (
 	github.com/russross/blackfriday/v2 v2.1.0
-	k8s.io/gengo v0.0.0-20240404160639-a0386bf69313
-	k8s.io/klog/v2 v2.130.0
+	k8s.io/gengo/v2 v2.0.0-20240404160639-a0386bf69313
+	k8s.io/klog/v2 v2.130.1
 )
 
-require github.com/go-logr/logr v1.4.1 // indirect
+require (
+	github.com/go-logr/logr v1.4.1 // indirect
+	golang.org/x/mod v0.14.0 // indirect
+	golang.org/x/tools v0.16.1 // indirect
+)
diff --git a/go.sum b/go.sum
index 7ad2c42..4c38fcc 100644
--- a/go.sum
+++ b/go.sum
@@ -1,44 +1,14 @@
-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/go-logr/logr v0.2.0/go.mod h1:z6/tIYblkpsD+a4lm/fGIIU9mZ+XfAiaFtq7xTgseGU=
 github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
 github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
-github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
-github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/gofuzz v1.1.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
-github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
-github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
-github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
-github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/mod v0.2.0 h1:KU7oHjnv3XNWfa5COkzUifxZmxp1TyI7ImMXqFxLwvQ=
-golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20200505023115-26f46d2f7ef8 h1:BMFHd4OFnFtWX46Xj4DN6vvT1btiBxyq+s0orYBqcQY=
-golang.org/x/tools v0.0.0-20200505023115-26f46d2f7ef8/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-k8s.io/gengo v0.0.0-20240404160639-a0386bf69313 h1:wBIDZID8ju9pwOiLlV22YYKjFGtiNSWgHf5CnKLRUuM=
-k8s.io/gengo v0.0.0-20240404160639-a0386bf69313/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
-k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
-k8s.io/klog/v2 v2.130.0 h1:5nB3+3HpqKqXJIXNtJdtxcDCfaa9KL8StJgMzGJkUkM=
-k8s.io/klog/v2 v2.130.0/go.mod h1:3Jpz1GvMt720eyJH1ckRHK1EDfpxISzJ7I9OYgaDtPE=
-sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=
+golang.org/x/mod v0.14.0 h1:dGoOF9QVLYng8IHTm7BAyWqCqSheQ5pYWGhzW00YJr0=
+golang.org/x/mod v0.14.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/sync v0.5.0 h1:60k92dhOjHxJkrqnwsfl8KuaHbn/5dl0lUPUklKo3qE=
+golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/tools v0.16.1 h1:TLyB3WofjdOEepBHAU20JdNC1Zbg87elYofWYAY5oZA=
+golang.org/x/tools v0.16.1/go.mod h1:kYVVN6I1mBNoB1OX+noeBjbRk4IUEPa7JJ+TJMEooJ0=
+k8s.io/gengo/v2 v2.0.0-20240404160639-a0386bf69313 h1:bKcdZJOPICVmIIuaM9+MXmapE94dn5AYv5ODs1jA43o=
+k8s.io/gengo/v2 v2.0.0-20240404160639-a0386bf69313/go.mod h1:VH3AT8AaQOqiGjMF9p0/IM1Dj+82ZwjfxUP1IxaHE+8=
+k8s.io/klog/v2 v2.130.1 h1:n9Xl7H1Xvksem4KFG4PYbdQCQxqc/tTUyrgXaOhHSzk=
+k8s.io/klog/v2 v2.130.1/go.mod h1:3Jpz1GvMt720eyJH1ckRHK1EDfpxISzJ7I9OYgaDtPE=
diff --git a/main.go b/main.go
index f21721b..762df37 100644
--- a/main.go
+++ b/main.go
@@ -21,8 +21,9 @@ import (
 	"unicode"
 
 	"github.com/russross/blackfriday/v2"
-	"k8s.io/gengo/parser"
-	"k8s.io/gengo/types"
+	"k8s.io/gengo/v2"
+	"k8s.io/gengo/v2/parser"
+	"k8s.io/gengo/v2/types"
 	"k8s.io/klog/v2"
 )
 
@@ -189,7 +190,7 @@ func main() {
 // groupName extracts the "//+groupName" meta-comment from the specified
 // package's comments, or returns empty string if it cannot be found.
 func groupName(pkg *types.Package) string {
-	m := types.ExtractCommentTags("+", pkg.Comments)
+	m := gengo.ExtractCommentTags("+", pkg.Comments)
 	v := m["groupName"]
 	if len(v) == 1 {
 		return v[0]
@@ -198,39 +199,43 @@ func groupName(pkg *types.Package) string {
 }
 
 func parseAPIPackages(dir string) ([]*types.Package, error) {
-	b := parser.New()
-	// the following will silently fail (turn on -v=4 to see logs)
-	if err := b.AddDirRecursive(*flAPIDir); err != nil {
-		return nil, err
+	p := parser.New()
+
+	pkgsFound, errFind := p.FindPackages(dir + "/...")
+	if errFind != nil {
+		return nil, fmt.Errorf("failed to find packages in %s: %w", dir, errFind)
+	}
+	klog.Infof("found %d packages", len(pkgsFound))
+
+	errLoad := p.LoadPackages(pkgsFound...)
+	if errLoad != nil {
+		return nil, fmt.Errorf("failed to load packages: %w", errLoad)
 	}
-	scan, err := b.FindTypes()
+
+	scan, err := p.NewUniverse()
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse pkgs and types: %w", err)
 	}
-	var pkgNames []string
-	for p := range scan {
-		pkg := scan[p]
+
+	var pkgs []*types.Package
+	for _, pkg := range scan {
+
 		klog.V(3).Infof("trying package=%v groupName=%s", p, groupName(pkg))
 
 		// Do not pick up packages that are in vendor/ as API packages. (This
 		// happened in knative/eventing-sources/vendor/..., where a package
 		// matched the pattern, but it didn't have a compatible import path).
 		if isVendorPackage(pkg) {
-			klog.V(3).Infof("package=%v coming from vendor/, ignoring.", p)
+			klog.V(3).Infof("package=%v coming from vendor/, ignoring.", pkg.Name)
 			continue
 		}
 
 		if groupName(pkg) != "" && len(pkg.Types) > 0 || containsString(pkg.DocComments, docCommentForceIncludes) {
-			klog.V(3).Infof("package=%v has groupName and has types", p)
-			pkgNames = append(pkgNames, p)
+			klog.V(3).Infof("package=%v has groupName and has types", pkg.Name)
+			klog.Info("using package=", pkg.Name)
+			pkgs = append(pkgs, pkg)
 		}
 	}
-	sort.Strings(pkgNames)
-	var pkgs []*types.Package
-	for _, p := range pkgNames {
-		klog.Infof("using package=%s", p)
-		pkgs = append(pkgs, scan[p])
-	}
 	return pkgs, nil
 }
 
@@ -300,7 +305,7 @@ func combineAPIPackages(pkgs []*types.Package) ([]*apiPackage, error) {
 // isVendorPackage determines if package is coming from vendor/ dir.
 func isVendorPackage(pkg *types.Package) bool {
 	vendorPattern := string(os.PathSeparator) + "vendor" + string(os.PathSeparator)
-	return strings.Contains(pkg.SourcePath, vendorPattern)
+	return strings.Contains(pkg.Dir, vendorPattern)
 }
 
 func findTypeReferences(pkgs []*apiPackage) map[*types.Type][]*types.Type {
@@ -589,7 +594,7 @@ func filterCommentTags(comments []string) []string {
 }
 
 func isOptionalMember(m types.Member) bool {
-	tags := types.ExtractCommentTags("+", m.CommentLines)
+	tags := gengo.ExtractCommentTags("+", m.CommentLines)
 	_, ok := tags["optional"]
 	return ok
 }