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-rw-r--r--sldtoppm.html2
1 files changed, 1 insertions, 1 deletions
diff --git a/sldtoppm.html b/sldtoppm.html
index 1ea3f2e8..cdca8af3 100644
--- a/sldtoppm.html
+++ b/sldtoppm.html
@@ -1,4 +1,4 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.3//EN">
 <html><head><title>Sldtoppm User Manual</title></head>
 <body>
 <h1>sldtoppm</h1>