diff --git a/backend/app/cmd/avatar.go b/backend/app/cmd/avatar.go
index 3baa4185..d5a91427 100644
--- a/backend/app/cmd/avatar.go
+++ b/backend/app/cmd/avatar.go
@@ -7,7 +7,7 @@ import (
 	log "github.com/go-pkgz/lgr"
 	bolt "go.etcd.io/bbolt"
 
-	"github.com/go-pkgz/auth/avatar"
+	"github.com/go-pkgz/auth/v2/avatar"
 )
 
 // AvatarCommand set of flags and command for avatar migration
diff --git a/backend/app/cmd/avatar_test.go b/backend/app/cmd/avatar_test.go
index 551ed6d7..a2bc7673 100644
--- a/backend/app/cmd/avatar_test.go
+++ b/backend/app/cmd/avatar_test.go
@@ -5,7 +5,7 @@ import (
 	"os"
 	"testing"
 
-	"github.com/go-pkgz/auth/avatar"
+	"github.com/go-pkgz/auth/v2/avatar"
 	"github.com/jessevdk/go-flags"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
diff --git a/backend/app/cmd/server.go b/backend/app/cmd/server.go
index 990d359e..42c9b3f3 100644
--- a/backend/app/cmd/server.go
+++ b/backend/app/cmd/server.go
@@ -23,11 +23,11 @@ import (
 	"github.com/kyokomi/emoji/v2"
 	bolt "go.etcd.io/bbolt"
 
-	"github.com/go-pkgz/auth"
-	"github.com/go-pkgz/auth/avatar"
-	"github.com/go-pkgz/auth/provider"
-	"github.com/go-pkgz/auth/provider/sender"
-	"github.com/go-pkgz/auth/token"
+	"github.com/go-pkgz/auth/v2"
+	"github.com/go-pkgz/auth/v2/avatar"
+	"github.com/go-pkgz/auth/v2/provider"
+	"github.com/go-pkgz/auth/v2/provider/sender"
+	"github.com/go-pkgz/auth/v2/token"
 	cache "github.com/go-pkgz/lcw/v2"
 
 	"github.com/umputun/remark42/backend/app/migrator"
@@ -1355,11 +1355,11 @@ func newAuthRefreshCache() *authRefreshCache {
 }
 
 // Get implements cache getter with key converted to string
-func (c *authRefreshCache) Get(key interface{}) (interface{}, bool) {
-	return c.LoadingCache.Peek(key.(string))
+func (c *authRefreshCache) Get(key string) (token.Claims, bool) {
+	return c.LoadingCache.Peek(key)
 }
 
 // Set implements cache setter with key converted to string
-func (c *authRefreshCache) Set(key, value interface{}) {
-	_, _ = c.LoadingCache.Get(key.(string), func() (token.Claims, error) { return value.(token.Claims), nil })
+func (c *authRefreshCache) Set(key string, value token.Claims) {
+	_, _ = c.LoadingCache.Get(key, func() (token.Claims, error) { return value, nil })
 }
diff --git a/backend/app/cmd/server_test.go b/backend/app/cmd/server_test.go
index 251189ff..bc13ba9e 100644
--- a/backend/app/cmd/server_test.go
+++ b/backend/app/cmd/server_test.go
@@ -15,7 +15,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-pkgz/auth/token"
+	"github.com/go-pkgz/auth/v2/token"
 	"github.com/golang-jwt/jwt/v5"
 	"github.com/jessevdk/go-flags"
 	"go.uber.org/goleak"
diff --git a/backend/app/rest/api/admin.go b/backend/app/rest/api/admin.go
index 49b3bd8a..34ab9933 100644
--- a/backend/app/rest/api/admin.go
+++ b/backend/app/rest/api/admin.go
@@ -8,7 +8,7 @@ import (
 
 	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/render"
-	"github.com/go-pkgz/auth"
+	"github.com/go-pkgz/auth/v2"
 	cache "github.com/go-pkgz/lcw/v2"
 	log "github.com/go-pkgz/lgr"
 	R "github.com/go-pkgz/rest"
diff --git a/backend/app/rest/api/admin_test.go b/backend/app/rest/api/admin_test.go
index 577c9bb1..ecbe33dd 100644
--- a/backend/app/rest/api/admin_test.go
+++ b/backend/app/rest/api/admin_test.go
@@ -13,7 +13,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-pkgz/auth/token"
+	"github.com/go-pkgz/auth/v2/token"
 	cache "github.com/go-pkgz/lcw/v2"
 	R "github.com/go-pkgz/rest"
 	"github.com/golang-jwt/jwt/v5"
diff --git a/backend/app/rest/api/rest.go b/backend/app/rest/api/rest.go
index 293e793d..5922fc30 100644
--- a/backend/app/rest/api/rest.go
+++ b/backend/app/rest/api/rest.go
@@ -21,7 +21,7 @@ import (
 	"github.com/go-chi/chi/v5/middleware"
 	"github.com/go-chi/cors"
 	"github.com/go-chi/render"
-	"github.com/go-pkgz/auth"
+	"github.com/go-pkgz/auth/v2"
 	"github.com/go-pkgz/lcw/v2"
 	log "github.com/go-pkgz/lgr"
 	R "github.com/go-pkgz/rest"
diff --git a/backend/app/rest/api/rest_private.go b/backend/app/rest/api/rest_private.go
index 41e4b2ce..cbe95792 100644
--- a/backend/app/rest/api/rest_private.go
+++ b/backend/app/rest/api/rest_private.go
@@ -16,8 +16,8 @@ import (
 
 	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/render"
-	"github.com/go-pkgz/auth"
-	"github.com/go-pkgz/auth/token"
+	"github.com/go-pkgz/auth/v2"
+	"github.com/go-pkgz/auth/v2/token"
 	cache "github.com/go-pkgz/lcw/v2"
 	log "github.com/go-pkgz/lgr"
 	R "github.com/go-pkgz/rest"
diff --git a/backend/app/rest/api/rest_private_test.go b/backend/app/rest/api/rest_private_test.go
index 6d0d4c88..8bdb440d 100644
--- a/backend/app/rest/api/rest_private_test.go
+++ b/backend/app/rest/api/rest_private_test.go
@@ -17,7 +17,7 @@ import (
 	"time"
 
 	"github.com/go-chi/render"
-	"github.com/go-pkgz/auth/token"
+	"github.com/go-pkgz/auth/v2/token"
 	"github.com/go-pkgz/lgr"
 	R "github.com/go-pkgz/rest"
 	"github.com/golang-jwt/jwt/v5"
diff --git a/backend/app/rest/api/rest_test.go b/backend/app/rest/api/rest_test.go
index 804e2c21..f5085c10 100644
--- a/backend/app/rest/api/rest_test.go
+++ b/backend/app/rest/api/rest_test.go
@@ -16,10 +16,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-pkgz/auth"
-	"github.com/go-pkgz/auth/avatar"
-	"github.com/go-pkgz/auth/provider"
-	"github.com/go-pkgz/auth/token"
+	"github.com/go-pkgz/auth/v2"
+	"github.com/go-pkgz/auth/v2/avatar"
+	"github.com/go-pkgz/auth/v2/provider"
+	"github.com/go-pkgz/auth/v2/token"
 	cache "github.com/go-pkgz/lcw/v2"
 	R "github.com/go-pkgz/rest"
 	"github.com/stretchr/testify/assert"
diff --git a/backend/app/rest/user.go b/backend/app/rest/user.go
index f908bea9..44963333 100644
--- a/backend/app/rest/user.go
+++ b/backend/app/rest/user.go
@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/go-pkgz/auth/token"
+	"github.com/go-pkgz/auth/v2/token"
 
 	"github.com/umputun/remark42/backend/app/store"
 )