diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index f1e27b397..061f9af32 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1330,7 +1330,7 @@
  * \def MBEDTLS_SSL_CID
  *
  * Enable support for the DTLS Connection ID extension
- * (version draft-ietf-tls-dtls-connection-id-04)
+ * (version draft-ietf-tls-dtls-connection-id-05)
  * which allows to identify DTLS connections across changes
  * in the underlying transport.
  *
diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index 228e33585..e2d8a275e 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -486,7 +486,7 @@ static void ssl_write_cid_ext( mbedtls_ssl_context *ssl,
 
     /*
      * Quoting
-     * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-04:
+     * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05:
      *
      *   struct {
      *      opaque cid<0..2^8-1>;
diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index 29d5bdd74..1639d70da 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -493,7 +493,7 @@ static int ssl_parse_cid_ext( mbedtls_ssl_context *ssl,
 
     /*
      * Quoting
-     * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-04:
+     * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05:
      *
      *   struct {
      *      opaque cid<0..2^8-1>;
@@ -2210,7 +2210,7 @@ static void ssl_write_cid_ext( mbedtls_ssl_context *ssl,
 
     /*
      * Quoting
-     * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-04:
+     * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05:
      *
      *   struct {
      *      opaque cid<0..2^8-1>;