--- work/mozilla/blacklist.txt.orig	2021-10-07 17:12:47.000000000 +0200
+++ work/mozilla/blacklist.txt	2021-10-09 22:48:50.449155614 +0200
@@ -10,3 +10,6 @@
 
 # Expired CA (#995432)
 "DST Root CA X3"
+
+# Negative serial number (python crytography fails to parse it)
+"EC-ACC"