diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index af28b455f..b17bc1a15 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1273,7 +1273,7 @@
  * \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 110660e3d..f6d9048ea 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -444,7 +444,7 @@ 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 7118b3705..bd7f80b6a 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -451,7 +451,7 @@ 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>;
@@ -2170,7 +2170,7 @@ 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>;