diff --git a/lib/tcpdf/readme_moodle.txt b/lib/tcpdf/readme_moodle.txt
index ee3863a6b04..c7d88e9ac51 100644
--- a/lib/tcpdf/readme_moodle.txt
+++ b/lib/tcpdf/readme_moodle.txt
@@ -1,15 +1,9 @@
-Description of TCPDF library import 6.3.2
+Description of TCPDF library import 6.3.5
 ==========================================
 * download library from https://github.com/tecnickcom/TCPDF/releases
 * delete examples/, tools/ VERSION and tcpdf_import.php
 * remove tcpdf_import.php from composer.json
 * remove all fonts that were not already present
-* Re-apply the following commits if they are not included in the upstream version imported:
-  (and remove them from here once they are verified to be part of the upstream library)
-  * 18dabac - https://git.io/JeKfU
-  * 60c9db7 - https://git.io/JeKfT
-  * 1adcd76 - https://git.io/JeKft
-  * 5e4d999 - https://git.io/JvrxB
 * visit http://127.0.0.1/lib/tests/other/pdflibtestpage.php and view the pdf
 
 Important
@@ -17,6 +11,11 @@ Important
 A new version of the libray is being developed @ https://github.com/tecnickcom/tc-lib-pdf . Check periodically when it's ready
 and if it's a drop-in replacement for the legacy tcpdf one.
 
+2020/12/15
+----------
+Upgrade to tcpdf TCPDF 6.3.5 (MDL-70294)
+by Paul Holden <paulh@moodle.com>
+
 2019/10/20
 ----------
 Upgrade to tcpdf TCPDF 6.3.2 (MDL-66966)
diff --git a/lib/thirdpartylibs.xml b/lib/thirdpartylibs.xml
index 768a7af3d57..fab29c184fe 100644
--- a/lib/thirdpartylibs.xml
+++ b/lib/thirdpartylibs.xml
@@ -116,8 +116,8 @@
     <location>tcpdf</location>
     <name>TCPDF</name>
     <license>LGPL</license>
-    <version>6.3.2</version>
-    <licenseversion>3</licenseversion>
+    <version>6.3.5</version>
+    <licenseversion>3.0-only</licenseversion>
   </library>
   <library>
     <location>typo3</location>