diff --git a/pdfjs.config b/pdfjs.config
index 18e8078ab..9abeee65e 100644
--- a/pdfjs.config
+++ b/pdfjs.config
@@ -1,5 +1,5 @@
 {
-  "stableVersion": "5.0.375",
+  "stableVersion": "5.1.91",
   "baseVersion": "d86045eacbd6f8cc9cbe8fd616800ca3edcbd0dc",
   "versionPrefix": "5.1."
 }