diff --git a/pdfjs.config b/pdfjs.config
index 52df3ac88..400077046 100644
--- a/pdfjs.config
+++ b/pdfjs.config
@@ -1,5 +1,5 @@
 {
-  "betaVersion": "1.4.11",
+  "betaVersion": "1.4.20",
   "stableVersion": "1.3.91",
   "baseVersion": "1eea0db897196417609ea3223fc9bd9728ed68ed",
   "versionPrefix": "1.4."