diff --git a/imsc1/spec/manifest.txt b/imsc1/spec/manifest.txt
deleted file mode 100644
index 10937f43..00000000
--- a/imsc1/spec/manifest.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-ttml-ww-profiles.html respec
-xml-schemas/index.html
-xml-schemas/imsc1.xsd
-xml-schemas/imsc1-all.xsd
-xml-schemas/imsc1-metadata.xsd
-xml-schemas/imsc1-parameters.xsd
-xml-schemas/imsc1-styling.xsd
-figures/fillLineGap-example-figure-1.png
-figures/fillLineGap-example-figure-2.png
-figures/forced-example-figure-1.png
-figures/hypothetical-render-figure-1.png
-figures/text-render-example-figure-2.png
diff --git a/imsc1/spec/ttml-ww-profiles.html b/imsc1/spec/ttml-ww-profiles.html
index 28d44ee0..5b18db07 100755
--- a/imsc1/spec/ttml-ww-profiles.html
+++ b/imsc1/spec/ttml-ww-profiles.html
@@ -41,7 +41,7 @@
                   ,   edDraftURI: "https://w3c.github.io/imsc/imsc1/spec/ttml-ww-profiles.html"
                   ,   github: {
                           repoURL : "https://github.com/w3c/imsc/",
-                          branch : "master"
+                          branch : "main"
 
                         }
                   ,   license: "document"
@@ -4112,3 +4112,4 @@ <h4>Deprecated Features</h4>
 </html>
 
 
+