diff --git a/go.mod b/go.mod
index b59f65ed..03a775d9 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module golang.org/x/pkgsite
 
-go 1.19
+go 1.23
 
 require (
 	cloud.google.com/go/cloudtasks v1.10.0
diff --git a/go.sum b/go.sum
index af6848e1..fe492be9 100644
--- a/go.sum
+++ b/go.sum
@@ -556,6 +556,7 @@ github.com/google/martian/v3 v3.0.0/go.mod h1:y5Zk1BBys9G+gd6Jrk0W3cC1+ELVxBWuIG
 github.com/google/martian/v3 v3.1.0/go.mod h1:y5Zk1BBys9G+gd6Jrk0W3cC1+ELVxBWuIGO+w/tUAp0=
 github.com/google/martian/v3 v3.2.1/go.mod h1:oBOf6HBosgwRXnUGWUB05QECsc6uvmMiJ3+6W4l/CUk=
 github.com/google/martian/v3 v3.3.2 h1:IqNFLAmvJOgVlpdEBiQbDc2EwKW77amAycfTuWKdfvw=
+github.com/google/martian/v3 v3.3.2/go.mod h1:oBOf6HBosgwRXnUGWUB05QECsc6uvmMiJ3+6W4l/CUk=
 github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
 github.com/google/pprof v0.0.0-20190515194954-54271f7e092f/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
 github.com/google/pprof v0.0.0-20191218002539-d4f498aebedc/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
@@ -1037,6 +1038,7 @@ github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9dec
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 github.com/yuin/goldmark v1.6.0 h1:boZcn2GTjpsynOsC0iJHnBWa4Bi0qzfJjthwauItG68=
+github.com/yuin/goldmark v1.6.0/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 github.com/yuin/gopher-lua v0.0.0-20200816102855-ee81675732da h1:NimzV1aGyq29m5ukMK0AMWEhFaL/lrEOaephfuoiARg=
 github.com/yuin/gopher-lua v0.0.0-20200816102855-ee81675732da/go.mod h1:E1AXubJBdNmFERAOucpDIxNzeGfLzg0mYh+UfMWdChA=
 github.com/yvasiyarov/go-metrics v0.0.0-20140926110328-57bccd1ccd43/go.mod h1:aX5oPXxHm3bOH+xeAttToC8pqch2ScQN/JoXYupl6xs=
diff --git a/internal/fetch/getters.go b/internal/fetch/getters.go
index 99d5b2e0..13ae0b53 100644
--- a/internal/fetch/getters.go
+++ b/internal/fetch/getters.go
@@ -523,6 +523,7 @@ func (g *goPackagesModuleGetter) Search(ctx context.Context, query string, limit
 				continue
 			}
 			if f.Doc != nil {
+				//lint:ignore SA1019 TODO(jba) create a doc.Package
 				result.Synopsis = doc.Synopsis(f.Doc.Text())
 			}
 		}
diff --git a/internal/godoc/codec/generate.go b/internal/godoc/codec/generate.go
index e5417c23..8642550d 100644
--- a/internal/godoc/codec/generate.go
+++ b/internal/godoc/codec/generate.go
@@ -154,7 +154,7 @@ func (g *generator) generate() ([]byte, error) {
 			}
 			// We use the same code for T and *T, so both are done.
 			g.done[t] = true
-			g.done[reflect.PtrTo(t)] = true
+			g.done[reflect.PointerTo(t)] = true
 		}
 	}
 
@@ -437,6 +437,8 @@ const initialBody = `
 
 // Code generated by the codec package. DO NOT EDIT.
 
+//lint:file-ignore SA1019 TODO(jba): fix
+
 package «.Package»
 
 import (
diff --git a/internal/godoc/codec/testdata/map.go b/internal/godoc/codec/testdata/map.go
index 1d2259fb..db8952b9 100644
--- a/internal/godoc/codec/testdata/map.go
+++ b/internal/godoc/codec/testdata/map.go
@@ -4,6 +4,8 @@
 
 // Code generated by the codec package. DO NOT EDIT.
 
+//lint:file-ignore SA1019 TODO(jba): fix
+
 package somepkg
 
 import (
diff --git a/internal/godoc/codec/testdata/slice.go b/internal/godoc/codec/testdata/slice.go
index d54078f7..63d145be 100644
--- a/internal/godoc/codec/testdata/slice.go
+++ b/internal/godoc/codec/testdata/slice.go
@@ -4,6 +4,8 @@
 
 // Code generated by the codec package. DO NOT EDIT.
 
+//lint:file-ignore SA1019 TODO(jba): fix
+
 package somepkg
 
 import (
diff --git a/internal/godoc/codec/testdata/struct.go b/internal/godoc/codec/testdata/struct.go
index 0ea3c62e..0c5cf7f0 100644
--- a/internal/godoc/codec/testdata/struct.go
+++ b/internal/godoc/codec/testdata/struct.go
@@ -4,6 +4,8 @@
 
 // Code generated by the codec package. DO NOT EDIT.
 
+//lint:file-ignore SA1019 TODO(jba): fix
+
 package somepkg
 
 import (
diff --git a/internal/godoc/encode_ast.gen.go b/internal/godoc/encode_ast.gen.go
index 4cf1521b..c2746390 100644
--- a/internal/godoc/encode_ast.gen.go
+++ b/internal/godoc/encode_ast.gen.go
@@ -4,6 +4,8 @@
 
 // Code generated by the codec package. DO NOT EDIT.
 
+//lint:file-ignore SA1019 TODO(jba): fix
+
 package godoc
 
 import (
@@ -2512,7 +2514,7 @@ func init() {
 		})
 }
 
-// Fields of ast_RangeStmt: For Key Value TokPos Tok X Body
+// Fields of ast_RangeStmt: For Key Value TokPos Tok X Body Range
 
 func encode_ast_RangeStmt(e *codec.Encoder, x *ast.RangeStmt) {
 	if !e.StartStruct(x == nil, x) {
@@ -2546,6 +2548,10 @@ func encode_ast_RangeStmt(e *codec.Encoder, x *ast.RangeStmt) {
 		e.EncodeUint(6)
 		encode_ast_BlockStmt(e, x.Body)
 	}
+	if x.Range != 0 {
+		e.EncodeUint(7)
+		e.EncodeInt(int64(x.Range))
+	}
 	e.EndStruct()
 }
 
@@ -2580,6 +2586,8 @@ func decode_ast_RangeStmt(d *codec.Decoder, p **ast.RangeStmt) {
 			x.X = d.DecodeAny().(ast.Expr)
 		case 6:
 			decode_ast_BlockStmt(d, &x.Body)
+		case 7:
+			x.Range = token.Pos(d.DecodeInt())
 		default:
 			d.UnknownField("ast.RangeStmt", n)
 		}
@@ -3954,7 +3962,7 @@ func init() {
 		})
 }
 
-// Fields of ast_File: Doc Package Name Decls Scope Imports Unresolved Comments
+// Fields of ast_File: Doc Package Name Decls Scope Imports Unresolved Comments FileStart FileEnd GoVersion
 
 func encode_ast_File(e *codec.Encoder, x *ast.File) {
 	if !e.StartStruct(x == nil, x) {
@@ -3992,6 +4000,18 @@ func encode_ast_File(e *codec.Encoder, x *ast.File) {
 		e.EncodeUint(7)
 		encode_slice_ast_CommentGroup(e, x.Comments)
 	}
+	if x.FileStart != 0 {
+		e.EncodeUint(8)
+		e.EncodeInt(int64(x.FileStart))
+	}
+	if x.FileEnd != 0 {
+		e.EncodeUint(9)
+		e.EncodeInt(int64(x.FileEnd))
+	}
+	if x.GoVersion != "" {
+		e.EncodeUint(10)
+		e.EncodeString(x.GoVersion)
+	}
 	e.EndStruct()
 }
 
@@ -4028,6 +4048,12 @@ func decode_ast_File(d *codec.Decoder, p **ast.File) {
 			decode_slice_ast_Ident(d, &x.Unresolved)
 		case 7:
 			decode_slice_ast_CommentGroup(d, &x.Comments)
+		case 8:
+			x.FileStart = token.Pos(d.DecodeInt())
+		case 9:
+			x.FileEnd = token.Pos(d.DecodeInt())
+		case 10:
+			x.GoVersion = d.DecodeString()
 		default:
 			d.UnknownField("ast.File", n)
 		}
diff --git a/internal/godoc/encode_test.go b/internal/godoc/encode_test.go
index b6fb8c7a..05ed056c 100644
--- a/internal/godoc/encode_test.go
+++ b/internal/godoc/encode_test.go
@@ -188,6 +188,7 @@ func printNode(w io.Writer, root ast.Node) error {
 		idx := len(seen)
 		seen[x] = idx
 		pr("%s#%d", ts, idx)
+		//lint:ignore SA1019 TODO(jba) remove ast.Object
 		if obj, ok := x.(*ast.Object); ok {
 			pr(" %s %s %v\n", obj.Name, obj.Kind, obj.Data)
 			prValue(obj.Decl, depth+1)
diff --git a/internal/godoc/render.go b/internal/godoc/render.go
index ebcf41e5..8c7adb6a 100644
--- a/internal/godoc/render.go
+++ b/internal/godoc/render.go
@@ -56,7 +56,7 @@ func (p *Package) DocInfo(ctx context.Context, innerPath string, sourceInfo *sou
 	if err != nil {
 		return "", nil, nil, err
 	}
-	return doc.Synopsis(d.Doc), cleanImports(d.Imports, d.ImportPath), api, nil
+	return d.Synopsis(d.Doc), cleanImports(d.Imports, d.ImportPath), api, nil
 }
 
 // cleanImports cleans import paths, in the sense of path.Clean.
diff --git a/internal/middleware/experiment_test.go b/internal/middleware/experiment_test.go
index c88dc730..066b6892 100644
--- a/internal/middleware/experiment_test.go
+++ b/internal/middleware/experiment_test.go
@@ -100,14 +100,13 @@ func TestSetAndLoadExperiments(t *testing.T) {
 }
 
 func TestShouldSetExperiment(t *testing.T) {
-	// Force the pre-go1.20 behavior of rand.Seed
-	rand.Seed(1)
+	rng := rand.New(rand.NewSource(1))
 	ipv4Addr := func() string {
 		a := make([]string, 4)
 		for i := 0; i < 4; i++ {
 			// The use case is simple enough that a deterministic
 			// seed should provide enough coverage.
-			a[i] = strconv.Itoa(rand.Intn(256))
+			a[i] = strconv.Itoa(rng.Intn(256))
 		}
 		return strings.Join(a, ".")
 	}