diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4731e82d..46b06824 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,29 +1,33 @@
 ## Changelog
 
+### [13.13.1](https://kaos.sh/ek/13.13.1)
+
+- `[spellcheck]` Distance calculation method now public
+
 ### [13.13.0](https://kaos.sh/ek/13.13.0)
 
-* `[req]` Added support for different types of slices to `Query`
-* `[req]` Added support for `fmt.Stringer` interface to `Query`
-* `[req]` Added interface for custom struct encoding for `Query`
-* `[req]` Improved `Query`encoding
+- `[req]` Added support for different types of slices to `Query`
+- `[req]` Added support for `fmt.Stringer` interface to `Query`
+- `[req]` Added interface for custom struct encoding for `Query`
+- `[req]` Improved `Query`encoding
 
 ### [13.12.0](https://kaos.sh/ek/13.12.0)
 
-* `[req]` Added custom timeout per request
-* `[req]` Added `Retrier`
-* `[req]` Make `Limiter` public
-* `[log]` Added `WithFullCallerPath` option to enable the output of the full caller path
-* `[strutil]` Added support of escaped strings to `Fields`
-* `[strutil]` Added fuzz tests for `Fields` method
-* `[knf]` Fixed build of fuzz tests
+- `[req]` Added custom timeout per request
+- `[req]` Added `Retrier`
+- `[req]` Make `Limiter` public
+- `[log]` Added `WithFullCallerPath` option to enable the output of the full caller path
+- `[strutil]` Added support of escaped strings to `Fields`
+- `[strutil]` Added fuzz tests for `Fields` method
+- `[knf]` Fixed build of fuzz tests
 
 ### [13.11.0](https://kaos.sh/ek/13.11.0)
 
-* `[req]` Added request limiter
+- `[req]` Added request limiter
 
 ### [13.10.1](https://kaos.sh/ek/13.10.1)
 
-* `[mathutil]` Added shorthand helper `B`
+- `[mathutil]` Added shorthand helper `B`
 
 ### [13.10.0](https://kaos.sh/ek/13.10.0)
 
diff --git a/spellcheck/spellcheck.go b/spellcheck/spellcheck.go
index 63a133c9..1d970c49 100644
--- a/spellcheck/spellcheck.go
+++ b/spellcheck/spellcheck.go
@@ -33,17 +33,9 @@ type suggestItem struct {
 
 type suggestItems []*suggestItem
 
-func (s suggestItems) Len() int {
-	return len(s)
-}
-
-func (s suggestItems) Less(i, j int) bool {
-	return s[i].score < s[j].score
-}
-
-func (s suggestItems) Swap(i, j int) {
-	s[i], s[j] = s[j], s[i]
-}
+func (s suggestItems) Len() int           { return len(s) }
+func (s suggestItems) Less(i, j int) bool { return s[i].score < s[j].score }
+func (s suggestItems) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
 
 // ////////////////////////////////////////////////////////////////////////////////// //
 
@@ -68,62 +60,8 @@ func Train(words []string) *Model {
 	return model
 }
 
-// ////////////////////////////////////////////////////////////////////////////////// //
-
-// Correct corrects given value
-func (m *Model) Correct(word string) string {
-	if m == nil || len(m.terms) == 0 {
-		return word
-	}
-
-	var result *suggestItem
-
-	for _, si := range getSuggestSlice(m.terms, word) {
-		if result == nil {
-			result = si
-			continue
-		}
-
-		if si.score < result.score {
-			result = si
-			continue
-		}
-	}
-
-	if result.score > mathutil.Between(m.Threshold, 1, 1000) {
-		return word
-	}
-
-	return result.term
-}
-
-// Suggest suggests words for given word or word part
-func (m *Model) Suggest(word string, max int) []string {
-	if m == nil || len(m.terms) == 0 {
-		return []string{word}
-	}
-
-	if max == 1 {
-		return []string{m.Correct(word)}
-	}
-
-	sis := getSuggestSlice(m.terms, word)
-
-	sort.Sort(sis)
-
-	var result []string
-
-	for i := 0; i < mathutil.Between(max, 1, len(sis)); i++ {
-		result = append(result, sis[i].term)
-	}
-
-	return result
-}
-
-// ////////////////////////////////////////////////////////////////////////////////// //
-
-// Damerau–Levenshtein distance algorithm and code
-func getDLDistance(source, target string) int {
+// Distance calculates distance using Damerau–Levenshtein algorithm
+func Distance(source, target string) int {
 	sl, tl := len(source), len(target)
 
 	if sl == 0 {
@@ -184,11 +122,65 @@ func getDLDistance(source, target string) int {
 	return h[sl+1][tl+1]
 }
 
+// ////////////////////////////////////////////////////////////////////////////////// //
+
+// Correct corrects given value
+func (m *Model) Correct(word string) string {
+	if m == nil || len(m.terms) == 0 {
+		return word
+	}
+
+	var result *suggestItem
+
+	for _, si := range getSuggestSlice(m.terms, word) {
+		if result == nil {
+			result = si
+			continue
+		}
+
+		if si.score < result.score {
+			result = si
+			continue
+		}
+	}
+
+	if result.score > mathutil.Between(m.Threshold, 1, 1000) {
+		return word
+	}
+
+	return result.term
+}
+
+// Suggest suggests words for given word or word part
+func (m *Model) Suggest(word string, max int) []string {
+	if m == nil || len(m.terms) == 0 {
+		return []string{word}
+	}
+
+	if max == 1 {
+		return []string{m.Correct(word)}
+	}
+
+	sis := getSuggestSlice(m.terms, word)
+
+	sort.Sort(sis)
+
+	var result []string
+
+	for i := 0; i < mathutil.Between(max, 1, len(sis)); i++ {
+		result = append(result, sis[i].term)
+	}
+
+	return result
+}
+
+// ////////////////////////////////////////////////////////////////////////////////// //
+
 func getSuggestSlice(terms []string, word string) suggestItems {
 	var result suggestItems
 
 	for _, t := range terms {
-		result = append(result, &suggestItem{t, getDLDistance(strings.ToLower(t), strings.ToLower(word))})
+		result = append(result, &suggestItem{t, Distance(strings.ToLower(t), strings.ToLower(word))})
 	}
 
 	return result
diff --git a/version.go b/version.go
index 50dde6ee..242ee83f 100644
--- a/version.go
+++ b/version.go
@@ -8,4 +8,4 @@ package ek
 // ////////////////////////////////////////////////////////////////////////////////// //
 
 // VERSION is current ek package version
-const VERSION = "13.13.0"
+const VERSION = "13.13.1"