diff --git a/regexes.go b/regexes.go
index af98d8daa..c67927a53 100644
--- a/regexes.go
+++ b/regexes.go
@@ -31,7 +31,7 @@ const (
 	uUID4RFC4122RegexString          = "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$"
 	uUID5RFC4122RegexString          = "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-5[0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$"
 	uUIDRFC4122RegexString           = "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$"
-	uLIDRegexString                  = "^[A-HJKMNP-TV-Z0-9]{26}$"
+	uLIDRegexString                  = "^(?i)[A-HJKMNP-TV-Z0-9]{26}$"
 	md4RegexString                   = "^[0-9a-f]{32}$"
 	md5RegexString                   = "^[0-9a-f]{32}$"
 	sha256RegexString                = "^[0-9a-f]{64}$"
diff --git a/validator_test.go b/validator_test.go
index 3b6d26348..ab95f8406 100644
--- a/validator_test.go
+++ b/validator_test.go
@@ -4338,7 +4338,7 @@ func TestULIDValidation(t *testing.T) {
 	}{
 		{"", false},
 		{"01BX5ZZKBKACT-V9WEVGEMMVRZ", false},
-		{"01bx5zzkbkactav9wevgemmvrz", false},
+		{"01bx5zzkbkactav9wevgemmvrz", true},
 		{"a987Fbc9-4bed-3078-cf07-9141ba07c9f3xxx", false},
 		{"01BX5ZZKBKACTAV9WEVGEMMVRZABC", false},
 		{"01BX5ZZKBKACTAV9WEVGEMMVRZABC", false},