diff --git a/share/man/man4/cc_cubic.4 b/share/man/man4/cc_cubic.4
index 92ac8971e867..806d6aec2441 100644
--- a/share/man/man4/cc_cubic.4
+++ b/share/man/man4/cc_cubic.4
@@ -77,7 +77,7 @@ There are currently no tunable MIB variables.
 .%A "Injong Rhee"
 .%A "Lisong Xu"
 .%T "CUBIC for Fast Long-Distance Networks"
-.%U "http://tools.ietf.org/id/draft-rhee-tcpm-cubic-02.txt"
+.%U "https://tools.ietf.org/id/draft-rhee-tcpm-cubic-02.txt"
 .Re
 .Rs
 .%A "Sangtae Ha"
diff --git a/share/man/man4/cc_htcp.4 b/share/man/man4/cc_htcp.4
index 46d94a12114a..fd223ca8b2d3 100644
--- a/share/man/man4/cc_htcp.4
+++ b/share/man/man4/cc_htcp.4
@@ -83,7 +83,7 @@ Default is 0 (disabled).
 .%A "D. Leith"
 .%A "R. Shorten"
 .%T "H-TCP: TCP Congestion Control for High Bandwidth-Delay Product Paths"
-.%U "http://tools.ietf.org/id/draft-leith-tcp-htcp-06.txt"
+.%U "https://tools.ietf.org/id/draft-leith-tcp-htcp-06.txt"
 .Re
 .Rs
 .%A "D. Leith"