diff --git a/regexes.go b/regexes.go
index 20c03b84..06f9a40a 100644
--- a/regexes.go
+++ b/regexes.go
@@ -56,12 +56,12 @@ const (
 	latitudeRegexString              = "^[-+]?([1-8]?\\d(\\.\\d+)?|90(\\.0+)?)$"
 	longitudeRegexString             = "^[-+]?(180(\\.0+)?|((1[0-7]\\d)|([1-9]?\\d))(\\.\\d+)?)$"
 	sSNRegexString                   = `^[0-9]{3}[ -]?(0[1-9]|[1-9][0-9])[ -]?([1-9][0-9]{3}|[0-9][1-9][0-9]{2}|[0-9]{2}[1-9][0-9]|[0-9]{3}[1-9])$`
-	hostnameRegexStringRFC952        = `^[a-zA-Z]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$`                     // https://tools.ietf.org/html/rfc952
-	hostnameRegexStringRFC1123       = `^[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$`                  // accepts hostname starting with a digit https://tools.ietf.org/html/rfc1123
-	fqdnRegexStringRFC1123           = `^([a-zA-Z0-9]{1}[a-zA-Z0-9-]{0,62})(\.[a-zA-Z0-9]{1}[a-zA-Z0-9-]{0,62})*?(\.[a-zA-Z]{1}[a-zA-Z0-9-]{0,62})\.?$` // same as hostnameRegexStringRFC1123 but must contain a non numerical TLD (possibly ending with '.')
-	btcAddressRegexString            = `^[13][a-km-zA-HJ-NP-Z1-9]{25,34}$`                                                                              // bitcoin address
-	btcAddressUpperRegexStringBech32 = `^BC1[02-9AC-HJ-NP-Z]{7,76}$`                                                                                    // bitcoin bech32 address https://en.bitcoin.it/wiki/Bech32
-	btcAddressLowerRegexStringBech32 = `^bc1[02-9ac-hj-np-z]{7,76}$`                                                                                    // bitcoin bech32 address https://en.bitcoin.it/wiki/Bech32
+	hostnameRegexStringRFC952        = `^[a-zA-Z]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$`                                                      // https://tools.ietf.org/html/rfc952
+	hostnameRegexStringRFC1123       = `^[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$`                                                   // accepts hostname starting with a digit https://tools.ietf.org/html/rfc1123
+	fqdnRegexStringRFC1123           = `^([a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*?(\.[a-zA-Z]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)\.?$` // same as hostnameRegexStringRFC1123 but must contain a non numerical TLD (possibly ending with '.')
+	btcAddressRegexString            = `^[13][a-km-zA-HJ-NP-Z1-9]{25,34}$`                                                                                                               // bitcoin address
+	btcAddressUpperRegexStringBech32 = `^BC1[02-9AC-HJ-NP-Z]{7,76}$`                                                                                                                     // bitcoin bech32 address https://en.bitcoin.it/wiki/Bech32
+	btcAddressLowerRegexStringBech32 = `^bc1[02-9ac-hj-np-z]{7,76}$`                                                                                                                     // bitcoin bech32 address https://en.bitcoin.it/wiki/Bech32
 	ethAddressRegexString            = `^0x[0-9a-fA-F]{40}$`
 	ethAddressUpperRegexString       = `^0x[0-9A-F]{40}$`
 	ethAddressLowerRegexString       = `^0x[0-9a-f]{40}$`
diff --git a/validator_test.go b/validator_test.go
index 67d3f83a..c07cff92 100644
--- a/validator_test.go
+++ b/validator_test.go
@@ -11108,6 +11108,12 @@ func TestFQDNValidation(t *testing.T) {
 		{"24.example24.com", true},
 		{"test.24.example.com", true},
 		{"test-site-http.test-site", true},
+		{"foo-.example.com", false},
+		{"foo.bar-.com", false},
+		{"example.com-", false},
+		{strings.Repeat("a", 63) + ".com", true},
+		{strings.Repeat("a", 64) + ".com", false},
+		{"-foo.example.com", false},
 		{"test24.example24.com..", false},
 		{"example", false},
 		{"192.168.0.1", false},