diff --git a/Failing-PDFs.md b/Failing-PDFs.md
index d069374..07bf652 100644
--- a/Failing-PDFs.md
+++ b/Failing-PDFs.md
@@ -17,11 +17,11 @@ From issue [#560](https://github.com/andreasgal/pdf.js/issues/560):
 From issue [#577](https://github.com/andreasgal/pdf.js/issues/577):
 
 * <del>FONT(no spaces): https://docs.rice.edu/confluence/download/attachments/4588376/unix01.pdf?version=1</del>
-* INVALID(RGBT content command instead of 'RG BT'): www-csag.ucsd.edu/~jburke/Vesta/Vesta_Overview.pdf
+* <del>INVALID(RGBT content command instead of 'RG BT'): www-csag.ucsd.edu/~jburke/Vesta/Vesta_Overview.pdf</del>
 * <del>FONT(no spaces): http://www.csb.yale.edu/userguides/graphics/rasmol/rasmol.pdf</del>
-* FONT(Type3 [#502](https://github.com/andreasgal/pdf.js/issues/502)): people.csail.mit.edu/ledlie/papers/tr-03-02.pdf
+* <del>FONT(Type3 [#502](https://github.com/andreasgal/pdf.js/issues/502)): people.csail.mit.edu/ledlie/papers/tr-03-02.pdf</del>
 * RENDERING(JPX [#268](https://github.com/andreasgal/pdf.js/issues/268)): www.nsa.gov/ia/_files/app/pdf_risks.pdf
-* INVALID(junk at start [#345](https://github.com/andreasgal/pdf.js/issues/345)): www.mit.edu/~6.033/writing-samples/usmanm_dp1.pdf
+* <del>INVALID(junk at start [#345](https://github.com/andreasgal/pdf.js/issues/345)): www.mit.edu/~6.033/writing-samples/usmanm_dp1.pdf</del>
 
 From issue [#600](https://github.com/andreasgal/pdf.js/issues/600):