diff --git a/.github/workflows/rebase.yml b/.github/workflows/rebase.yml
deleted file mode 100644
index 3d2ad5a..0000000
--- a/.github/workflows/rebase.yml
+++ /dev/null
@@ -1,22 +0,0 @@
-on:
-  issue_comment:
-    types: [created]
-
-name: Automatic Rebase
-jobs:
-  rebase:
-    name: Rebase
-    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/rebase')
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout the latest code
-        uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-
-      - name: Automatic Rebase
-        uses: cirrus-actions/rebase@1.7
-        with:
-          autosquash: ${{ contains(github.event.comment.body, '/autosquash') || contains(github.event.comment.body, '/rebase-autosquash') }}
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 9d5b625..972cfb2 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -20,51 +20,37 @@ jobs:
       matrix:
         go-version: [1.18.x, 1.x]
     steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 1
-      - uses: WillAbides/setup-go-faster@v1
-        with:
-          go-version: ${{ matrix.go-version }}
+      - uses: actions/checkout@v4
 
-      - uses: actions/cache@v3
+      - name: Setup Go ${{ matrix.go-version }}
+        uses: actions/setup-go@v5
         with:
-          # In order:
-          # * Module download cache
-          # * Build cache (Linux)
-          # * Build cache (Mac)
-          # * Build cache (Windows)
-          path: |
-            ~/go/pkg/mod
-            ~/.cache/go-build
-            ~/Library/Caches/go-build
-            %LocalAppData%\go-build
-          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
-          restore-keys: |
-            ${{ runner.os }}-go-
+          go-version: ${{ matrix.go-version }}
 
       - name: Test with race and coverage
         run: |
           go test -race -coverprofile=coverage.out -covermode=atomic
           go tool cover -func=coverage.out
 
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
           files: ./coverage.out
+          token: ${{ secrets.CODECOV_TOKEN }} # required
 
   lint:
     name: "Run static analysis"
     runs-on: "ubuntu-latest"
     steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 1
-      - uses: WillAbides/setup-go-faster@v1
+      - uses: actions/checkout@v4
+
+      - name: Setup Go ${{ matrix.go-version }}
+        uses: actions/setup-go@v5
         with:
           go-version: "1.x"
 
       - run: "go vet ./..."
 
-      - uses: dominikh/staticcheck-action@v1
+      - name: Staticcheck
+        uses: dominikh/staticcheck-action@v1.3.0
         with:
-          version: "2022.1.3"
+          install-go: false
diff --git a/languages_substitution.go b/languages_substitution.go
index e2e0ae3..7661d6a 100644
--- a/languages_substitution.go
+++ b/languages_substitution.go
@@ -26,6 +26,7 @@ func init() {
 		&nlSub,
 		&nnSub,
 		&plSub,
+		&ptSub,
 		&roSub,
 		&slSub,
 		&svSub,
@@ -187,6 +188,25 @@ var plSub = map[rune]string{
 	'@': "na",
 }
 
+var ptSub = map[rune]string{
+	'&': "e",
+	'@': "em",
+	'á': "a",
+	'Á': "A",
+	'é': "e",
+	'É': "E",
+	'í': "i",
+	'Í': "I",
+	'ó': "o",
+	'Ó': "O",
+	'ö': "o",
+	'Ö': "O",
+	'ú': "u",
+	'Ú': "U",
+	'ü': "u",
+	'Ü': "U",
+}
+
 var roSub = map[rune]string{
 	'&': "si",
 	'Ă': "A",
@@ -255,7 +275,7 @@ var bgSub = map[rune]string{
 	'Ц': "Ts",
 	'Ч': "Ch",
 	'Ш': "Sh",
-	'Щ': "Sh",
+	'Щ': "Sht",
 	'Ъ': "A",
 	'Ь': "Y",
 	'Ю': "Yu",
diff --git a/slug.go b/slug.go
index e12b21e..763a012 100644
--- a/slug.go
+++ b/slug.go
@@ -39,6 +39,10 @@ var (
 	// Default is true.
 	Lowercase = true
 
+	// Append timestamp to the end in order to make slug unique
+	// Default is false
+	AppendTimestamp = false
+
 	regexpNonAuthorizedChars = regexp.MustCompile("[^a-zA-Z0-9-_]")
 	regexpMultipleDashes     = regexp.MustCompile("-+")
 )
@@ -96,6 +100,8 @@ func MakeLang(s string, lang string) (slug string) {
 		slug = SubstituteRune(slug, nnSub)
 	case "pl", "pol":
 		slug = SubstituteRune(slug, plSub)
+	case "pt", "prt", "pt-br", "br", "bra", "por":
+		slug = SubstituteRune(slug, ptSub)
 	case "ro", "rou":
 		slug = SubstituteRune(slug, roSub)
 	case "sl", "slv":
@@ -128,6 +134,10 @@ func MakeLang(s string, lang string) (slug string) {
 		slug = smartTruncate(slug)
 	}
 
+	if AppendTimestamp {
+		slug = slug + "-" + timestamp()
+	}
+
 	return slug
 }
 
@@ -178,6 +188,11 @@ func smartTruncate(text string) string {
 	return text[:MaxLength]
 }
 
+// timestamp returns current timestamp as string
+func timestamp() string {
+	return strconv.FormatInt(time.Now().Unix(), 10)
+}
+
 // IsSlug returns True if provided text does not contain white characters,
 // punctuation, all letters are lower case and only from ASCII range.
 // It could contain `-` and `_` but not at the beginning or end of the text.
diff --git a/slug_test.go b/slug_test.go
index 0867c0e..5c45c2c 100644
--- a/slug_test.go
+++ b/slug_test.go
@@ -8,6 +8,7 @@ package slug
 import (
 	"strconv"
 	"strings"
+	"regexp"
 	"testing"
 )
 
@@ -76,8 +77,8 @@ func TestSlugMakeLang(t *testing.T) {
 		want      string
 		lowercase bool
 	}{
-		{"bg", "АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЬЮЯабвгдежзийклмнопрстуфхцчшщъьюя", "abvgdezhziyklmnoprstufhtschshshayyuyaabvgdezhziyklmnoprstufhtschshshtayyuya", true},
-		{"bg", "АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЬЮЯабвгдежзийклмнопрстуфхцчшщъьюя", "ABVGDEZhZIYKLMNOPRSTUFHTsChShShAYYuYaabvgdezhziyklmnoprstufhtschshshtayyuya", false},
+		{"bg", "АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЬЮЯабвгдежзийклмнопрстуфхцчшщъьюя", "abvgdezhziyklmnoprstufhtschshshtayyuyaabvgdezhziyklmnoprstufhtschshshtayyuya", true},
+		{"bg", "АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЬЮЯабвгдежзийклмнопрстуфхцчшщъьюя", "ABVGDEZhZIYKLMNOPRSTUFHTsChShShtAYYuYaabvgdezhziyklmnoprstufhtschshshtayyuya", false},
 		{"cs", "ěščřžýáíéúůóňťĚŠČŘŽÝÁÍÉÚŮÓŇŤ", "escrzyaieuuontescrzyaieuuont", true},
 		{"cs", "ěščřžýáíéúůóňťĚŠČŘŽÝÁÍÉÚŮÓŇŤ", "escrzyaieuuontESCRZYAIEUUONT", false},
 		{"ces", "ěščřžýáíéúůóňťĚŠČŘŽÝÁÍÉÚŮÓŇŤ", "escrzyaieuuontescrzyaieuuont", true},
@@ -97,6 +98,7 @@ func TestSlugMakeLang(t *testing.T) {
 		{"hu", "SzÉlÜtÖtt ŰrÚjsÁgírÓnŐ", "SzElUtOtt-UrUjsAgirOnO", false},
 		{"kk", "әғһіңөқұүӘҒҺІҢӨҚҰҮ", "aghinoquuaghinoquu", true},
 		{"kk", "әғһіңөқұүӘҒҺІҢӨҚҰҮ", "aghinoquuAGHINOQUU", false},
+		{"pt", "áÁéÉíÍóÓöÖúÚüÜ", "aAeEiIoOoOuUuU", false},
 		{"ro", "ĂăÂăÎîȘșȚț", "aaaaiisstt", true},
 		{"ro", "ĂăÂăÎîȘșȚț", "AaAaIiSsTt", false},
 		{"tr", "şüöğıçŞÜÖİĞÇ", "suogicsuoigc", true},
@@ -128,6 +130,7 @@ func TestSlugMakeLang(t *testing.T) {
 		{"kk", "This @ that", "this-that", true},
 		{"nl", "This & that", "this-en-that", true},
 		{"pl", "This & that", "this-i-that", true},
+		{"pt", "This & that", "this-e-that", true},
 		{"pol", "This & that", "this-i-that", true},
 		{"sv", "This & that", "this-och-that", true},
 		{"sv", "This @ that", "this-snabel-a-that", true},
@@ -205,6 +208,7 @@ func TestSlugMakeUserSubstituteLang(t *testing.T) {
 				got, smust.want)
 		}
 	}
+	CustomSub = nil
 }
 
 func TestSlugMakeSubstituteOrderLang(t *testing.T) {
@@ -232,6 +236,8 @@ func TestSlugMakeSubstituteOrderLang(t *testing.T) {
 				got, smsot.want)
 		}
 	}
+	CustomRuneSub = nil
+	CustomSub = nil
 }
 
 func TestSubstituteLang(t *testing.T) {
@@ -342,6 +348,90 @@ func TestSlugMakeSmartTruncate(t *testing.T) {
 	}
 }
 
+func TestSlugMakeAppendTimestamp(t *testing.T) {
+	testCases := []struct {
+		in              string
+		want            string
+		appendTimestamp bool
+	}{
+		{"DOBROSLAWZYBORT", "dobroslawzybort", true},
+		{"Dobroslaw Zybort", "dobroslaw-zybort", true},
+		{"  Dobroslaw     Zybort  ?", "dobroslaw-zybort", true},
+		{"Dobrosław Żybort", "dobroslaw-zybort", true},
+		{"Ala ma 6 kotów.", "ala-ma-6-kotow", true},
+
+		{"áÁàÀãÃâÂäÄąĄą̊Ą̊", "aaaaaaaaaaaaaa", true},
+		{"ćĆĉĈçÇčČ", "cccccccc", true},
+		{"éÉèÈẽẼêÊëËęĘěĚ", "eeeeeeeeeeeeee", true},
+		{"íÍìÌĩĨîÎïÏįĮ", "iiiiiiiiiiii", true},
+		{"łŁ", "ll", true},
+		{"ńŃ", "nn", true},
+		{"óÓòÒõÕôÔöÖǫǪǭǬø", "ooooooooooooooo", true},
+		{"śŚšŠ", "ssss", true},
+		{"řŘ", "rr", true},
+		{"ťŤ", "tt", true},
+		{"úÚùÙũŨûÛüÜųŲůŮ", "uuuuuuuuuuuuuu", true},
+		{"y̨Y̨ýÝ", "yyyy", true},
+		{"źŹżŹžŽ", "zzzzzz", true},
+		{"·/,:;`˜'\"", "", true},
+		{"2000–2013", "2000-2013", true},
+		{"style—not", "style-not", true},
+		{"test_slug", "test_slug", true},
+		{"_test_slug_", "test_slug", true},
+		{"-test-slug-", "test-slug", true},
+		{"Æ", "ae", true},
+		{"Ich heiße", "ich-heisse", true},
+		{"𐀀", "", true}, // Bug #53
+		{"% 5 @ 4 $ 3 / 2 & 1 & 2 # 3 @ 4 _ 5", "5-at-4-3-2-and-1-and-2-3-at-4-_-5", true},
+
+		{"This & that", "this-and-that", true},
+		{"fácil €", "facil-eu", true},
+		{"smile ☺", "smile", true},
+		{"Hellö Wörld хелло ворлд", "hello-world-khello-vorld", true},
+		{"\"C'est déjà l’été.\"", "cest-deja-lete", true},
+		{"jaja---lol-méméméoo--a", "jaja-lol-mememeoo-a", true},
+		{"影師", "ying-shi", true},
+		{"Đanković & Kožušček", "dankovic-and-kozuscek", true},
+		{"ĂăÂâÎîȘșȚț", "aaaaiisstt", true},
+
+		// No append timestamp
+		{"DOBROSLAWZYBORT", "dobroslawzybort", false},
+		{"Dobroslaw Zybort", "dobroslaw-zybort", false},
+		{"  Dobroslaw     Zybort  ?", "dobroslaw-zybort", false},
+		{"Dobrosław Żybort", "dobroslaw-zybort", false},
+		{"Ala ma 6 kotów.", "ala-ma-6-kotow", false},
+	}
+
+	MaxLength = 0
+	EnableSmartTruncate = true
+	CustomRuneSub = nil
+	CustomSub = nil
+	Lowercase = true
+	for index, st := range testCases {
+		if st.appendTimestamp {
+			AppendTimestamp = true
+		} else {
+			AppendTimestamp = false
+		}
+		got := Make(st.in)
+		if st.appendTimestamp {
+			want := regexp.MustCompile(`^` + st.want + `-\d{10}$`)
+			if !want.MatchString(got) {
+				t.Errorf(
+					"%d. AppendTimestamp = %v; Make(%#v) = %#v; want %#v",
+					index, st.appendTimestamp, st.in, got, want,
+				)
+			}
+			continue
+		}
+		if got != st.want {
+			t.Errorf(
+				"%d. Make(%#v) = %#v; want %#v",
+				index, st.in, got, st.want)
+		}
+	}
+}
+
 func TestIsSlug(t *testing.T) {
 	MaxLength = 0
 	type args struct {