diff --git a/action.yml b/action.yml
index cda5f6d..6d5de17 100644
--- a/action.yml
+++ b/action.yml
@@ -23,6 +23,10 @@ inputs:
     description: no output, only validation
     required: false
 
+  verbose:
+    description: verbose logging
+    required: false
+
   loose:
     description: skip JSON schema validation
     required: false
diff --git a/cmd/cmd.go b/cmd/cmd.go
index b2ef102..831851e 100644
--- a/cmd/cmd.go
+++ b/cmd/cmd.go
@@ -6,6 +6,7 @@ import (
 	_ "embed"
 	"encoding/json"
 	"io/fs"
+	"log/slog"
 	"os"
 	"path/filepath"
 
@@ -22,13 +23,14 @@ type options struct {
 	compact bool
 	catalog bool
 	quiet   bool
+	verbose bool
 	loose   bool
 	lint    bool
 	api     string
 }
 
 // New creates new cobra command for exec command.
-func New() (*cobra.Command, error) {
+func New(levelVar *slog.LevelVar) (*cobra.Command, error) {
 	opts := new(options)
 
 	legacy := false
@@ -43,6 +45,10 @@ func New() (*cobra.Command, error) {
 		Args:              cobra.MaximumNArgs(1),
 		CompletionOptions: cobra.CompletionOptions{DisableDefaultCmd: true},
 		RunE: func(cmd *cobra.Command, args []string) error {
+			if opts.verbose && levelVar != nil {
+				levelVar.Set(slog.LevelDebug)
+			}
+
 			if legacy {
 				return legacyConvert(cmd.Context())
 			}
@@ -72,6 +78,7 @@ func New() (*cobra.Command, error) {
 	flags.BoolVar(&opts.lint, "lint", false, "enable built-in linter")
 	flags.BoolVarP(&opts.compact, "compact", "c", false, "compact instead of pretty-printed output")
 	flags.BoolVar(&opts.catalog, "catalog", false, "generate catalog instead of registry")
+	flags.BoolVarP(&opts.verbose, "verbose", "v", false, "verbose logging")
 	root.MarkFlagsMutuallyExclusive("compact", "quiet")
 
 	flags.BoolP("version", "V", false, "print version")
diff --git a/cmd/k6registry/action.go b/cmd/k6registry/action.go
index 39a45ff..3f258eb 100644
--- a/cmd/k6registry/action.go
+++ b/cmd/k6registry/action.go
@@ -5,6 +5,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"log/slog"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -33,7 +34,11 @@ func emitOutput() error {
 		return err
 	}
 
-	_, err = fmt.Fprintf(file, "changed=%t\n", isChanged(ref, out))
+	changed := isChanged(ref, out)
+
+	slog.Debug("Detect change", "changed", changed, "ref", ref)
+
+	_, err = fmt.Fprintf(file, "changed=%t\n", changed)
 	if err != nil {
 		return err
 	}
diff --git a/cmd/k6registry/main.go b/cmd/k6registry/main.go
index 32b5b52..97780be 100644
--- a/cmd/k6registry/main.go
+++ b/cmd/k6registry/main.go
@@ -3,23 +3,38 @@ package main
 
 import (
 	"log"
+	"log/slog"
 	"os"
 
 	"github.com/grafana/k6registry/cmd"
+	sloglogrus "github.com/samber/slog-logrus/v2"
+	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
 
 var version = "dev"
 
+func initLogging() *slog.LevelVar {
+	levelVar := new(slog.LevelVar)
+
+	logrus.SetLevel(logrus.DebugLevel)
+
+	logger := slog.New(sloglogrus.Option{Level: levelVar}.NewLogrusHandler())
+
+	slog.SetDefault(logger)
+
+	return levelVar
+}
+
 func main() {
 	log.SetFlags(0)
 	log.Writer()
 
-	runCmd(newCmd(getArgs()))
+	runCmd(newCmd(getArgs(), initLogging()))
 }
 
-func newCmd(args []string) *cobra.Command {
-	cmd, err := cmd.New()
+func newCmd(args []string, levelVar *slog.LevelVar) *cobra.Command {
+	cmd, err := cmd.New(levelVar)
 	if err != nil {
 		log.Fatal(formatError(err))
 	}
@@ -59,6 +74,10 @@ func getArgs() []string {
 		args = append(args, "--quiet")
 	}
 
+	if getenv("INPUT_VERBOSE", "false") == "true" {
+		args = append(args, "--verbose")
+	}
+
 	if getenv("INPUT_LOOSE", "false") == "true" {
 		args = append(args, "--loose")
 	}
diff --git a/cmd/lint.go b/cmd/lint.go
index 45c9830..6dd252f 100644
--- a/cmd/lint.go
+++ b/cmd/lint.go
@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"errors"
 	"io/fs"
+	"log/slog"
 	"os"
 	"path/filepath"
 
@@ -73,6 +74,8 @@ func updateWorkdir(ctx context.Context, dir string, cloneURL string) error {
 	}
 
 	if notfound {
+		slog.Debug("Clone", "url", cloneURL)
+
 		_, err = git.PlainCloneContext(ctx, dir, false, &git.CloneOptions{URL: cloneURL})
 		return err
 	}
@@ -87,6 +90,8 @@ func updateWorkdir(ctx context.Context, dir string, cloneURL string) error {
 		return err
 	}
 
+	slog.Debug("Pull", "url", cloneURL)
+
 	err = wtree.Pull(&git.PullOptions{Force: true})
 	if err != nil && !errors.Is(err, git.NoErrAlreadyUpToDate) {
 		return err
@@ -98,6 +103,8 @@ func updateWorkdir(ctx context.Context, dir string, cloneURL string) error {
 func checkCompliance(ctx context.Context, module string, cloneURL string, tstamp float64) (*k6lint.Compliance, error) {
 	com, found, err := loadCompliance(ctx, module, tstamp)
 	if found {
+		slog.Debug("Compliance from cache", "module", module)
+
 		return com, nil
 	}
 
@@ -116,6 +123,8 @@ func checkCompliance(ctx context.Context, module string, cloneURL string, tstamp
 		return nil, err
 	}
 
+	slog.Debug("Check compliance", "module", module)
+
 	compliance, err := k6lint.Lint(ctx, dir, &k6lint.Options{
 		Passed: []k6lint.Checker{k6lint.CheckerLicense, k6lint.CheckerVersions, k6lint.CheckerGit},
 	})
diff --git a/cmd/load.go b/cmd/load.go
index 473c7cd..4c98450 100644
--- a/cmd/load.go
+++ b/cmd/load.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"strings"
 
 	"github.com/Masterminds/semver/v3"
@@ -34,8 +35,11 @@ func load(ctx context.Context, in io.Reader, loose bool, lint bool) (k6registry.
 	)
 
 	if loose {
+		slog.Debug("Read source")
 		raw, err = io.ReadAll(in)
 	} else {
+		slog.Debug("Validate source")
+
 		raw, err = validateWithSchema(in)
 	}
 
@@ -45,6 +49,8 @@ func load(ctx context.Context, in io.Reader, loose bool, lint bool) (k6registry.
 
 	var registry k6registry.Registry
 
+	slog.Debug("Unmarshal source")
+
 	if err := yaml.Unmarshal(raw, &registry); err != nil {
 		return nil, err
 	}
@@ -52,6 +58,7 @@ func load(ctx context.Context, in io.Reader, loose bool, lint bool) (k6registry.
 	registry = append(registry, k6AsExtension())
 
 	for idx, ext := range registry {
+		slog.Debug("Process extension", "module", ext.Module)
 		if len(ext.Tier) == 0 {
 			registry[idx].Tier = k6registry.TierCommunity
 		}
@@ -99,6 +106,7 @@ func load(ctx context.Context, in io.Reader, loose bool, lint bool) (k6registry.
 }
 
 func loadRepository(ctx context.Context, module string) (*k6registry.Repository, []string, error) {
+	slog.Debug("Loading repository", "module", module)
 	if strings.HasPrefix(module, k6Module) || strings.HasPrefix(module, ghModulePrefix) {
 		repo, tags, err := loadGitHub(ctx, module)
 		if err != nil {
diff --git a/go.mod b/go.mod
index 8003b15..0805794 100644
--- a/go.mod
+++ b/go.mod
@@ -11,6 +11,8 @@ require (
 	github.com/grafana/clireadme v0.1.0
 	github.com/grafana/k6lint v0.1.0
 	github.com/narqo/go-badge v0.0.0-20230821190521-c9a75c019a59
+	github.com/samber/slog-logrus/v2 v2.5.0
+	github.com/sirupsen/logrus v1.9.3
 	github.com/spf13/cobra v1.8.1
 	github.com/xanzy/go-gitlab v0.109.0
 	github.com/xeipuuv/gojsonschema v1.2.0
@@ -54,6 +56,8 @@ require (
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/samber/lo v1.44.0 // indirect
+	github.com/samber/slog-common v0.17.0 // indirect
 	github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect
 	github.com/shogo82148/go-shuffle v1.0.1 // indirect
 	github.com/skeema/knownhosts v1.2.2 // indirect
diff --git a/go.sum b/go.sum
index 4d62278..9982647 100644
--- a/go.sum
+++ b/go.sum
@@ -139,12 +139,20 @@ github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDN
 github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA=
 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/samber/lo v1.44.0 h1:5il56KxRE+GHsm1IR+sZ/6J42NODigFiqCWpSc2dybA=
+github.com/samber/lo v1.44.0/go.mod h1:RmDH9Ct32Qy3gduHQuKJ3gW1fMHAnE/fAzQuf6He5cU=
+github.com/samber/slog-common v0.17.0 h1:HdRnk7QQTa9ByHlLPK3llCBo8ZSX3F/ZyeqVI5dfMtI=
+github.com/samber/slog-common v0.17.0/go.mod h1:mZSJhinB4aqHziR0SKPqpVZjJ0JO35JfH+dDIWqaCBk=
+github.com/samber/slog-logrus/v2 v2.5.0 h1:0R1QlxBApEX6GOdCulqvDbeOK09LCSUDSEjVvm5ZeD4=
+github.com/samber/slog-logrus/v2 v2.5.0/go.mod h1:xN6h40pDGXSJDgZsttF9KtaIV7dtpjeoBDpw8TpvRr8=
 github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 h1:n661drycOFuPLCN3Uc8sB6B/s6Z4t2xvBgU1htSHuq8=
 github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3/go.mod h1:A0bzQcvG0E7Rwjx0REVgAGH58e96+X0MeOfepqsbeW4=
 github.com/shogo82148/go-shuffle v0.0.0-20180218125048-27e6095f230d/go.mod h1:2htx6lmL0NGLHlO8ZCf+lQBGBHIbEujyywxJArf+2Yc=
 github.com/shogo82148/go-shuffle v1.0.1 h1:4swIpHXLMAz14DE4YTgakgadpRN0n1wE1dieGnOTVFU=
 github.com/shogo82148/go-shuffle v1.0.1/go.mod h1:HQPjVgUUZ9TNgm4/K/iXRuAdhPsQrXnAGgtk/9kqbBY=
 github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
+github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
+github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/skeema/knownhosts v1.2.2 h1:Iug2P4fLmDw9f41PB6thxUkNUkJzB5i+1/exaj40L3A=
 github.com/skeema/knownhosts v1.2.2/go.mod h1:xYbVRSPxqBZFrdmDyMmsOs+uX1UZC3nTN3ThzgDxUwo=
 github.com/spf13/cobra v1.8.1 h1:e5/vxKd/rZsfSJMUX1agtjeTDf+qv1/JdBF8gg5k9ZM=
@@ -156,6 +164,7 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/thlib/go-timezone-local v0.0.0-20210907160436-ef149e42d28e h1:BuzhfgfWQbX0dWzYzT1zsORLnHRv3bcRcsaUk0VmXA8=
diff --git a/tools/gendoc/main.go b/tools/gendoc/main.go
index c1f8b3e..364ded8 100644
--- a/tools/gendoc/main.go
+++ b/tools/gendoc/main.go
@@ -7,6 +7,6 @@ import (
 )
 
 func main() {
-	root, _ := cmd.New()
+	root, _ := cmd.New(nil)
 	clireadme.Main(root, 1)
 }