diff --git a/cmd/internal/migrations/v3/common.go b/cmd/internal/migrations/v3/common.go
index e6b177c..bc8870d 100644
--- a/cmd/internal/migrations/v3/common.go
+++ b/cmd/internal/migrations/v3/common.go
@@ -602,8 +602,7 @@ func MigrateSessionConfig(cmd *cobra.Command, cwd string, _, _ *semver.Version)
 	err := internal.ChangeFileContent(cwd, func(content string) string {
 		reConfig := regexp.MustCompile(`session\.Config{[^}]*}`)
 		return reConfig.ReplaceAllStringFunc(content, func(s string) string {
-			s = strings.ReplaceAll(s, "Expiration:", "IdleTimeout:")
-			return s
+			return strings.ReplaceAll(s, "Expiration:", "IdleTimeout:")
 		})
 	})
 	if err != nil {
diff --git a/cmd/internal/migrations/v3/common_test.go b/cmd/internal/migrations/v3/common_test.go
index 2982128..41bd251 100644
--- a/cmd/internal/migrations/v3/common_test.go
+++ b/cmd/internal/migrations/v3/common_test.go
@@ -834,6 +834,98 @@ var _ = session.New(session.Config{
 	assert.Contains(t, buf.String(), "Migrating session middleware configs")
 }
 
+func Test_MigrateSessionConfig_KeyLookup_Cookie(t *testing.T) {
+	t.Parallel()
+
+	dir, err := os.MkdirTemp("", "msessionkl_cookie")
+	require.NoError(t, err)
+	defer func() { require.NoError(t, os.RemoveAll(dir)) }()
+
+	file := writeTempFile(t, dir, `package main
+import "github.com/gofiber/fiber/v2/middleware/session"
+var _ = session.New(session.Config{
+    KeyLookup: "cookie:session_id",
+})`)
+
+	var buf bytes.Buffer
+	cmd := newCmd(&buf)
+	require.NoError(t, v3.MigrateSessionExtractor(cmd, dir, nil, nil))
+
+	content := readFile(t, file)
+	assert.NotContains(t, content, "KeyLookup")
+	assert.Contains(t, content, `Extractor: session.FromCookie("session_id")`)
+	assert.Contains(t, buf.String(), "Migrating session KeyLookup config")
+}
+
+func Test_MigrateSessionConfig_KeyLookup_Header(t *testing.T) {
+	t.Parallel()
+
+	dir, err := os.MkdirTemp("", "msessionkl_header")
+	require.NoError(t, err)
+	defer func() { require.NoError(t, os.RemoveAll(dir)) }()
+
+	file := writeTempFile(t, dir, `package main
+import "github.com/gofiber/fiber/v2/middleware/session"
+var _ = session.New(session.Config{
+    KeyLookup: "header:X-Session-ID",
+})`)
+
+	var buf bytes.Buffer
+	cmd := newCmd(&buf)
+	require.NoError(t, v3.MigrateSessionExtractor(cmd, dir, nil, nil))
+
+	content := readFile(t, file)
+	assert.NotContains(t, content, "KeyLookup")
+	assert.Contains(t, content, `Extractor: session.FromHeader("X-Session-ID")`)
+	assert.Contains(t, buf.String(), "Migrating session KeyLookup config")
+}
+
+func Test_MigrateSessionConfig_KeyLookup_Query(t *testing.T) {
+	t.Parallel()
+
+	dir, err := os.MkdirTemp("", "msessionkl_query")
+	require.NoError(t, err)
+	defer func() { require.NoError(t, os.RemoveAll(dir)) }()
+
+	file := writeTempFile(t, dir, `package main
+import "github.com/gofiber/fiber/v2/middleware/session"
+var _ = session.New(session.Config{
+    KeyLookup: "query:session_id",
+})`)
+
+	var buf bytes.Buffer
+	cmd := newCmd(&buf)
+	require.NoError(t, v3.MigrateSessionExtractor(cmd, dir, nil, nil))
+
+	content := readFile(t, file)
+	assert.NotContains(t, content, "KeyLookup")
+	assert.Contains(t, content, `Extractor: session.FromQuery("session_id")`)
+	assert.Contains(t, buf.String(), "Migrating session KeyLookup config")
+}
+
+func Test_MigrateSessionConfig_KeyLookup_Unknown(t *testing.T) {
+	t.Parallel()
+
+	dir, err := os.MkdirTemp("", "msessionkl_unknown")
+	require.NoError(t, err)
+	defer func() { require.NoError(t, os.RemoveAll(dir)) }()
+
+	file := writeTempFile(t, dir, `package main
+import "github.com/gofiber/fiber/v2/middleware/session"
+var _ = session.New(session.Config{
+    KeyLookup: "unknown:session_id",
+})`)
+
+	var buf bytes.Buffer
+	cmd := newCmd(&buf)
+	require.NoError(t, v3.MigrateSessionExtractor(cmd, dir, nil, nil))
+
+	content := readFile(t, file)
+	assert.NotContains(t, content, "KeyLookup")
+	assert.NotContains(t, content, "Extractor")
+	assert.Contains(t, buf.String(), "Migrating session KeyLookup config")
+}
+
 func Test_MigrateTimeoutConfig(t *testing.T) {
 	t.Parallel()