diff --git a/update/devhistory.txt b/update/devhistory.txt
index a1d1879..76db249 100644
--- a/update/devhistory.txt
+++ b/update/devhistory.txt
@@ -95,3 +95,7 @@
 [unannounced]    -i installer option reinstalls A2SERVER
                  
 1.5.0: Jan 2016: defaults to GitHub for location of installer scripts
+[unannounced]
+
+1.5.1: May 2016: changed URLs from rawgit.com to raw.githubusercontent.com
+                 to resolve https problems during install
diff --git a/update/versionhistory.txt b/update/versionhistory.txt
index 6916615..2b1dc95 100644
--- a/update/versionhistory.txt
+++ b/update/versionhistory.txt
@@ -67,6 +67,9 @@
                  for current date; install from any host URL for development;
                  source code at GitHub (thanks Joseph)
 
+1.5.1: Jan 2016: fixed GitHub URLs to prevent https errors during installation
+                 (thanks to http://blogs.yahoo.co.jp/ushi_cow/57459736.html)
+
 Big thanks to: Anthony Martino, Henry Courbis, Joseph Carter, Jason King,
 Andy McFadden, Steven Hirsch, Geoff Body, Peter Wong, Tony Diaz, David Schmidt,
 David Schmenk, Ewen Wannop, Andrew Roughan, Antoine Vignau, Martin Haye,