Update to 1.0.
diff --git a/Doc/Makefile b/Doc/Makefile
index f62b25b..2669d3d 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -40,7 +40,7 @@
 checkout:
 	@if [ ! -d tools/sphinx ]; then \
 	  echo "Checking out Sphinx..."; \
-	  svn checkout $(SVNROOT)/external/Sphinx-0.6.5/sphinx tools/sphinx; \
+	  svn checkout $(SVNROOT)/external/Sphinx-1.0/sphinx tools/sphinx; \
 	fi
 	@if [ ! -d tools/docutils ]; then \
 	  echo "Checking out Docutils..."; \