diff --git a/libraries/AP_SerialManager/AP_SerialManager.cpp b/libraries/AP_SerialManager/AP_SerialManager.cpp
index faffda29eb..f43f4e09b8 100644
--- a/libraries/AP_SerialManager/AP_SerialManager.cpp
+++ b/libraries/AP_SerialManager/AP_SerialManager.cpp
@@ -1,5 +1,5 @@
 /*
-   Please contribute your ideas! See http://dev.ardupilot.org for details
+   Please contribute your ideas! See https://dev.ardupilot.org for details
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
diff --git a/libraries/AP_SerialManager/AP_SerialManager.h b/libraries/AP_SerialManager/AP_SerialManager.h
index 2e38ecea03..44f627bf8f 100644
--- a/libraries/AP_SerialManager/AP_SerialManager.h
+++ b/libraries/AP_SerialManager/AP_SerialManager.h
@@ -1,5 +1,5 @@
 /*
-   Please contribute your ideas! See http://dev.ardupilot.org for details
+   Please contribute your ideas! See https://dev.ardupilot.org for details
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by