diff --git a/Makefile b/Makefile
index 362565f..503bf2f 100644
--- a/Makefile
+++ b/Makefile
@@ -36,9 +36,9 @@ version_html/tmp/index.html: version_html/tmp/guide.html
 
 version_html/tmp/index.xhtml: version_html/tmp/index.html
 	cd $(dir $<) &&\
-	(tidy -c -e -utf8 --output-xhtml 1 --fix-uri 1 $(notdir $<) > $(notdir $@) || test -f $(notdir $@)) &&\
-	(for file in guide*.html; do tidy -utf8 --output-xhtml 1 $$file > `basename $$file html`xhtml; done || /bin/true) &&\
-	(tidy -utf8 --output-xhtml 1 index.html > index.xhtml || test -f index.xhtml) &&\
+	(tidy -c -e -utf8 -asxhtml --doctype strict --fix-uri 1 $(notdir $<) > $(notdir $@) || test -f $(notdir $@)) &&\
+	(for file in guide*.html; do tidy -utf8 -asxhtml --doctype strict $$file > `basename $$file html`xhtml; done || /bin/true) &&\
+	(tidy -utf8 -asxhtml --doctype strict index.html > index.xhtml || test -f index.xhtml) &&\
 	sed -i -e 's/guide\([0-9]*\)\.html/guide\1.xhtml/g' *.xhtml
 
 version_html/guide.html: version_html/tmp/index.xhtml $(wildcard version_html/tmp/*.xhtml)
diff --git a/README b/README
index 097c0ab..5721c9f 100644
--- a/README
+++ b/README
@@ -9,7 +9,7 @@ installée, ainsi que les build-essential.
 
 === Pour construire le guide, version html ===
 
-La procédure est faite sur une Debian Wheezy, avec une distribution LaTeX
-installée, ainsi que les build-essential, hevea et xsltproc.
+La procédure est faite sur une Debian Buster, avec une distribution LaTeX
+installée, ainsi que les build-essential, hevea, tidy et xsltproc.
 
-- Dans un terminal, tapez "make version_html/index.html".
+- Dans un terminal, tapez "make version_html/guide.html".
diff --git a/lolipop.hva b/lolipop.hva
index 0b378ef..287d671 100644
--- a/lolipop.hva
+++ b/lolipop.hva
@@ -87,7 +87,7 @@
 \newenvironment{capture}[2][]{\begin{rawhtml}<div class="guide_capture">
 <a href="\end{rawhtml}\@screenshots #2\begin{rawhtml}.png"
 class="guide_screenshot_fullscreen">
-<img class="guide_screenshot_vignette" src="\end{rawhtml}\@screenshots\@lowres #2\begin{rawhtml}.png"/>
+<img class="guide_screenshot_vignette" src="\end{rawhtml}\@screenshots\@lowres #2\begin{rawhtml}.png">
 </a>\end{rawhtml}}
 {\begin{rawhtml}
 </div>\end{rawhtml}}
@@ -133,7 +133,7 @@ class="guide_screenshot_fullscreen">
 
 \newenvironment{ressource}[1]
 {\begin{rawhtml}<div class="guide_ressource"><a href="\end{rawhtml}\@images #1\begin{rawhtml}.png"><p>
-<img src="\end{rawhtml}\@images\@lowres #1\begin{rawhtml}.png"/></a>\end{rawhtml}}
+<img src="\end{rawhtml}\@images\@lowres #1\begin{rawhtml}.png"></a>\end{rawhtml}}
 {\begin{rawhtml}</p></div>\end{rawhtml}\par}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
diff --git a/tools/xslt/xslt-html.sh b/tools/xslt/xslt-html.sh
index 18813c1..7ffe5e3 100755
--- a/tools/xslt/xslt-html.sh
+++ b/tools/xslt/xslt-html.sh
@@ -1,4 +1,4 @@
 #!/bin/bash
 
 export XML_CATALOG_FILES="dtd/catalog"
-xsltproc -o ../../version_html/guide.html guide-html.xsl conf.xml 
+xsltproc -o ../../version_html/guide.html guide-html.xsl conf.xml