diff --git a/cipher_suites.go b/cipher_suites.go
index 26dc92d..ef6ccde 100644
--- a/cipher_suites.go
+++ b/cipher_suites.go
@@ -387,7 +387,7 @@ func mutualCipherSuite(have []uint16, want uint16) *cipherSuite {
 // A list of cipher suite IDs that are, or have been, implemented by this
 // package.
 //
-// Taken from http://www.iana.org/assignments/tls-parameters/tls-parameters.xml
+// Taken from https://www.iana.org/assignments/tls-parameters/tls-parameters.xml
 const (
 	// TLS 1.0 - 1.2 cipher suites.
 	TLS_RSA_WITH_RC4_128_SHA                uint16 = 0x0005
diff --git a/common.go b/common.go
index e14b0ed..303d7b3 100644
--- a/common.go
+++ b/common.go
@@ -108,7 +108,7 @@ const (
 )
 
 // CurveID is the type of a TLS identifier for an elliptic curve. See
-// http://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-8
+// https://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-8
 //
 // TLS 1.3 refers to these as Groups, but this library implements only
 // curve-based ones anyway. See https://tools.ietf.org/html/draft-ietf-tls-tls13-18#section-4.2.4.
@@ -138,7 +138,7 @@ type psk struct {
 }
 
 // TLS Elliptic Curve Point Formats
-// http://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-9
+// https://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-9
 const (
 	pointFormatUncompressed uint8 = 0
 )