diff --git a/README.md b/README.md
index 4636f5ec7..f35f019f8 100644
--- a/README.md
+++ b/README.md
@@ -67,7 +67,7 @@ The R6RS core of the Chez Scheme language is described in
 which also includes an introduction to Scheme and a set of example programs.
 Chez Scheme's additional language, run-time system, and
 programming environment features are described in the
-[Chez Scheme User's Guide](http://cisco.github.io/ChezScheme/csug9.5/csug.html).
+[Chez Scheme User's Guide](http://cisco.github.io/ChezScheme/csug10.0/csug.html).
 The latter includes a shared index and a shared summary of forms,
 with links where appropriate to the former, so it is often the best
 starting point.
diff --git a/configure b/configure
index d3c91edba..04453c80c 100755
--- a/configure
+++ b/configure
@@ -634,7 +634,7 @@ if [ "$installdoc" = "" ] ; then
 fi
 
 if [ "$installcsug" = "" ] ; then
-  installcsug=$installdoc/csug9.5
+  installcsug=$installdoc/csug10.0
 fi
 
 if [ "$installreleasenotes" = "" ] ; then