diff --git a/INITIAL-COMMANDS.md b/INITIAL-COMMANDS.md
index 4ec68668..31c58555 100644
--- a/INITIAL-COMMANDS.md
+++ b/INITIAL-COMMANDS.md
@@ -55,39 +55,6 @@ Then continue setup with
 [scheduled automatic updates](README.md#scheduled-automatic-updates) or
 [editing configuration](README.md#editing-configuration).
 
-## Install from mirror
-
-In case you have issues with my default source using a mirror may help.
-Just replace the first lines for updated variables.
-
-> 💡️ **Hint**: You may want to set the same *url* with `ScriptUpdatesBaseUrl`
-> in `global-config-overlay`.
-
-> ⚠️ **Warning**: The mirrors do not provide checksums. Each invocation of
-> `$ScriptInstallUpdate` takes longer and generates more traffic, as every
-> script needs to be downloaded for local check!
-
-### Install from git.eworm.de
-
-      :local BaseUrl "https://git.eworm.de/cgit/routeros-scripts/plain/";
-      :local CertCommonName "Root YE";
-      :local CertFileName "Root-YE.pem";
-      :local CertFingerprint "e14ffcad5b0025731006caa43a121a22d8e9700f4fb9cf852f02a708aa5d5666";
-
-### Install from Github
-
-      :local BaseUrl "https://raw.githubusercontent.com/eworm-de/routeros-scripts/main/";
-      :local CertCommonName "Root YR";
-      :local CertFileName "Root-YR.pem";
-      :local CertFingerprint "e57b7e6f150c419102e8d5c055729ff967b9d1a829bf00cec89ca604ebf4a86f";
-
-### Install from Gitlab
-
-      :local BaseUrl "https://gitlab.com/eworm-de/routeros-scripts/raw/main/";
-      :local CertCommonName "Sectigo Public Server Authentication Root R46";
-      :local CertFileName "Sectigo-Public-Server-Authentication-Root-R46.pem";
-      :local CertFingerprint "7bb647a62aeeac88bf257aa522d01ffea395e0ab45c73f93f65654ec38f25a06";
-
 ## Fix existing installation
 
 The [initial commands](#initial-commands) above allow to fix an existing
diff --git a/certs/Makefile b/certs/Makefile
index 48de17c2..c9a33798 100644
--- a/certs/Makefile
+++ b/certs/Makefile
@@ -13,7 +13,7 @@ DOMAINS_DUAL = \
 	dns.google/GTS-Root-RX \
 	dns.quad9.net/DigiCert-Global-Root-G3 \
 	git.eworm.de/Root-YE \
-	gitlab.com/Sectigo-Public-Server-Authentication-Root-R46 \
+	gitlab.com/USERTrust-RSA-Certification-Authority \
 	lists.blocklist.de/GTS-Root-R4 \
 	matrix.org/GTS-Root-R4 \
 	raw.githubusercontent.com/ISRG-Root-X1 \
diff --git a/certs/Sectigo-Public-Server-Authentication-Root-R46.pem b/certs/Sectigo-Public-Server-Authentication-Root-R46.pem
deleted file mode 100644
index 72f2f82b..00000000
--- a/certs/Sectigo-Public-Server-Authentication-Root-R46.pem
+++ /dev/null
@@ -1,39 +0,0 @@
-# Issuer: CN=Sectigo Public Server Authentication Root R46 O=Sectigo Limited
-# Subject: CN=Sectigo Public Server Authentication Root R46 O=Sectigo Limited
-# Label: "Sectigo Public Server Authentication Root R46"
-# Serial: 156256931880233212765902055439220583700
-# MD5 Fingerprint: 32:10:09:52:00:d5:7e:6c:43:df:15:c0:b1:16:93:e5
-# SHA1 Fingerprint: ad:98:f9:f3:e4:7d:75:3b:65:d4:82:b3:a4:52:17:bb:6e:f5:e4:38
-# SHA256 Fingerprint: 7b:b6:47:a6:2a:ee:ac:88:bf:25:7a:a5:22:d0:1f:fe:a3:95:e0:ab:45:c7:3f:93:f6:56:54:ec:38:f2:5a:06
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----