diff --git a/baked_in.go b/baked_in.go
index 2f66c183..fdefdd9b 100644
--- a/baked_in.go
+++ b/baked_in.go
@@ -24,6 +24,7 @@ import (
 
 	"github.com/gabriel-vasile/mimetype"
 	urn "github.com/leodido/go-urn"
+	"github.com/lib/pq"
 )
 
 // Func accepts a FieldLevel interface for all validation needs. The return
@@ -326,6 +327,11 @@ func isUnique(fl FieldLevel) bool {
 
 	switch field.Kind() {
 	case reflect.Slice, reflect.Array:
+		// If it's a pq.StringArray, convert it to a []string for easier handling
+		if field.Type() == reflect.TypeOf(pq.StringArray{}) {
+			field = reflect.ValueOf([]string(field.Interface().(pq.StringArray)))
+		}
+
 		elem := field.Type().Elem()
 		if elem.Kind() == reflect.Ptr {
 			elem = elem.Elem()
diff --git a/go.mod b/go.mod
index c77643fc..2125684e 100644
--- a/go.mod
+++ b/go.mod
@@ -8,6 +8,7 @@ require (
 	github.com/go-playground/locales v0.14.1
 	github.com/go-playground/universal-translator v0.18.1
 	github.com/leodido/go-urn v1.4.0
+	github.com/lib/pq v1.10.9
 	golang.org/x/crypto v0.19.0
 	golang.org/x/text v0.14.0
 )
diff --git a/go.sum b/go.sum
index 3bf8a6e6..15d4d035 100644
--- a/go.sum
+++ b/go.sum
@@ -9,6 +9,8 @@ github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJn
 github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
 github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ=
 github.com/leodido/go-urn v1.4.0/go.mod h1:bvxc+MVxLKB4z00jd1z+Dvzr47oO32F/QSNjSBOlFxI=
+github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
+github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 golang.org/x/crypto v0.19.0 h1:ENy+Az/9Y1vSrlrvBSyna3PITt4tiZLf7sgCjZBX7Wo=