diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 2a246c5..07e8259 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -31,7 +31,7 @@ jobs:
 
       - name: Modver
         if: ${{ github.event_name == 'pull_request' }}
-        uses: bobg/modver@v2.14.0
+        uses: bobg/modver@v2.14.2
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           pull_request_url: https://github.com/${{ github.repository }}/pull/${{ github.event.number }}
diff --git a/Readme.md b/Readme.md
index 8888881..5705e16 100644
--- a/Readme.md
+++ b/Readme.md
@@ -1,7 +1,6 @@
 # Decouple - find overspecified function parameters in Go code
 
 [![Go Reference](https://pkg.go.dev/badge/github.com/bobg/decouple.svg)](https://pkg.go.dev/github.com/bobg/decouple)
-[![Go Report Card](https://goreportcard.com/badge/github.com/bobg/decouple)](https://goreportcard.com/report/github.com/bobg/decouple)
 [![Tests](https://github.com/bobg/decouple/actions/workflows/go.yml/badge.svg)](https://github.com/bobg/decouple/actions/workflows/go.yml)
 [![Coverage Status](https://coveralls.io/repos/github/bobg/decouple/badge.svg?branch=main)](https://coveralls.io/github/bobg/decouple?branch=main)
 [![Mentioned in Awesome Go](https://awesome.re/mentioned-badge.svg)](https://github.com/avelino/awesome-go)
diff --git a/cmd/decouple/main.go b/cmd/decouple/main.go
index 95b8e83..582f98c 100644
--- a/cmd/decouple/main.go
+++ b/cmd/decouple/main.go
@@ -145,7 +145,7 @@ func showJSON(w io.Writer, checker decouple.Checker, tuples []decouple.Tuple) er
 			return jt.Params[i].Name < jt.Params[j].Name
 		})
 		if err := enc.Encode(jt); err != nil {
-			return err
+			return errors.Wrap(err, "encoding JSON output")
 		}
 	}
 
diff --git a/errf_test.go b/errf_test.go
index bdcf186..8bdc9e8 100644
--- a/errf_test.go
+++ b/errf_test.go
@@ -8,8 +8,7 @@ import (
 func TestErrf(t *testing.T) {
 	got := errf("What's a %d?", 412)
 
-	var d derr
-	if !errors.As(got, &d) {
+	if _, ok := errors.AsType[derr](got); !ok {
 		t.Errorf("got %v, want derr", got)
 	}
 
diff --git a/go.mod b/go.mod
index 207b45f..40d715d 100644
--- a/go.mod
+++ b/go.mod
@@ -6,10 +6,10 @@ require (
 	github.com/bobg/errors v1.3.0
 	github.com/bobg/go-generics/v4 v4.2.0
 	github.com/bobg/seqs v1.8.0
-	golang.org/x/tools v0.42.0
+	golang.org/x/tools v0.49.0
 )
 
 require (
-	golang.org/x/mod v0.33.0 // indirect
-	golang.org/x/sync v0.19.0 // indirect
+	golang.org/x/mod v0.39.0 // indirect
+	golang.org/x/sync v0.22.0 // indirect
 )
diff --git a/go.sum b/go.sum
index ac31411..796de31 100644
--- a/go.sum
+++ b/go.sum
@@ -10,7 +10,13 @@ github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o
 github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
 golang.org/x/mod v0.33.0 h1:tHFzIWbBifEmbwtGz65eaWyGiGZatSrT9prnU8DbVL8=
 golang.org/x/mod v0.33.0/go.mod h1:swjeQEj+6r7fODbD2cqrnje9PnziFuw4bmLbBZFrQ5w=
+golang.org/x/mod v0.39.0 h1:UF5zwQdCRRUpHfyPwr7d4UrGiVeldIsogtzWVnczL74=
+golang.org/x/mod v0.39.0/go.mod h1:bvIbwjQ0HUFFf5AKukeeYQG4ZBUG9yxQbR9aEweIwYY=
 golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
 golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sync v0.22.0 h1:SZjpbeLmrCk4xhRSZFNZW5gFUeCeFgjekvI/+gfScek=
+golang.org/x/sync v0.22.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
 golang.org/x/tools v0.42.0 h1:uNgphsn75Tdz5Ji2q36v/nsFSfR/9BRFvqhGBaJGd5k=
 golang.org/x/tools v0.42.0/go.mod h1:Ma6lCIwGZvHK6XtgbswSoWroEkhugApmsXyrUmBhfr0=
+golang.org/x/tools v0.49.0 h1:3NI7VXzL9+1WZD52Dx2ttoPwD5DWrFGpl9mFZDlmisI=
+golang.org/x/tools v0.49.0/go.mod h1:SJNXV9DBKT0UbdttsQjbfJlAE/q+y36++zo3uL3N0Oo=