diff --git a/etc/DST Root CA X3.txt b/etc/DST Root CA X3.txt
new file mode 100644
index 0000000..38751db
--- /dev/null
+++ b/etc/DST Root CA X3.txt	
@@ -0,0 +1,22 @@
+DST Root CA X3
+
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE----
diff --git a/etc/README.md b/etc/README.md
index ac647a9..895b927 100644
--- a/etc/README.md
+++ b/etc/README.md
@@ -5,8 +5,8 @@ The certificate trust stores were retrieved from
 
 * **Linux:** Copied from an up-to-date Debian Linux machine
 * **Mozilla:** https://curl.haxx.se/docs/caextract.html
-* **Java:** extracted (``keytool -list -rfc -keystore lib/security/cacerts | grep -E -v '^$|^\*\*\*\*\*|^Entry |^Creation |^Alias '``) from a JDK 15 from https://jdk.java.net/. (use dos2unix).
-* **Microsoft:** Following command pulls all certificates from Windows Update services: ``CertUtil -syncWithWU -f -f . `` (see also http://aka.ms/RootCertDownload, https://technet.microsoft.com/en-us/library/dn265983(v=ws.11).aspx#BKMK_CertUtilOptions).
+* **Java:** extracted (``keytool -list -rfc -keystore lib/security/cacerts | grep -E -v '^$|^\*\*\*\*\*|^Entry |^Creation |^Alias '``) from a JDK LTS version from https://jdk.java.net/. (use dos2unix).
+* **Microsoft:** Following command pulls all certificates from Windows Update services: ``CertUtil -syncWithWU -f -f . `` (see also http://aka.ms/RootCertDownload, https://technet.microsoft.com/en-us/library/dn265983(v=ws.11).aspx#BKMK_CertUtilOptions). They are in DER format. Convert them like ``for f in \*.cer; do echo $f >/dev/stderr; openssl x509 -in $f -inform DER -outform PEM ;done >/tmp/Microsoft.pem``
 * **Apple:**
     1. __System:__ from Apple OS X keychain app.  Open Keychain Access utility, i.e.
   In the Finder window, under Favorites --> "Applications" --> "Utilities"
@@ -14,8 +14,9 @@ The certificate trust stores were retrieved from
   --> "Keychain Access" (2 click). In that window --> "Keychains" --> "System Root"
   --> "Category" --> "All Items"
   Select all CA certificates except for "Developer ID Certification Authority", omit expired ones,  "File" --> "Export Items"
-    2. __Internet:__ Pick the latest subdir (=highest number) from https://opensource.apple.com/source/security_certificates/. They are in DER format despite their file extension. Download them with ``wget --level=1 --cut-dirs=5 --mirror --convert-links --adjust-extension --page-requisites --no-parent https://opensource.apple.com/source/security_certificates/security_certificates-<latest>/certificates/roots/``. Then: ``for f in *.cer *.crt; do echo $f >/dev/stderr; openssl x509 -in $f -inform DER -outform PEM ;done >/tmp/Apple.pem``
+    2. __Internet:__ Pick the latest subdir (=highest number) from https://opensource.apple.com/source/security_certificates/. They are in all DER format despite their file extension. Download them with ``wget --level=1 --cut-dirs=5 --mirror --convert-links --adjust-extension --page-requisites --no-parent https://opensource.apple.com/source/security_certificates/security_certificates-<latest>/certificates/roots/``. Then: ``for f in \*.cer \*.der \*.crt; do echo $f >/dev/stderr; openssl x509 -in $f -inform DER -outform PEM ;done >/tmp/Apple.pem``
 
+**Attention**: You need to remove the DST Root CA X3 which is for your reference in this directory.
 
 Google Chromium uses basically the trust stores above, see https://www.chromium.org/Home/chromium-security/root-ca-policy.