diff --git a/test/pdfs/hmm.pdf.link b/test/pdfs/hmm.pdf.link
index 14b3c1bac..abb77b195 100644
--- a/test/pdfs/hmm.pdf.link
+++ b/test/pdfs/hmm.pdf.link
@@ -1 +1 @@
-http://web.archive.org/web/20160106162920/http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.145.4773&rep=rep1&type=pdf
+https://web.archive.org/web/20130626074301/http://speech.tifr.res.in/tutorials/hmmTutorialBarbaraExercises.pdf
diff --git a/test/test_manifest.json b/test/test_manifest.json
index c70cd79f3..a3c597e60 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -356,7 +356,7 @@
     },
     {  "id": "hmm-pdf",
        "file": "pdfs/hmm.pdf",
-       "md5": "ea163ef2b6b69039e0c2c1364f280f67",
+       "md5": "e08467e60101ee5f4a59716e86db6dc9",
        "link": true,
        "rounds": 1,
        "firstPage": 1,