diff --git a/boot/optee-os/0001-scripts-pem_to_pub.py-use-Cryptodome-module-instead-.patch b/boot/optee-os/0001-scripts-pem_to_pub.py-use-Cryptodome-module-instead-.patch
new file mode 100644
index 0000000000..9c35c038a8
--- /dev/null
+++ b/boot/optee-os/0001-scripts-pem_to_pub.py-use-Cryptodome-module-instead-.patch
@@ -0,0 +1,34 @@
+From 04a8def18caccad27292ba97dc8ea8b3eb3a6afd Mon Sep 17 00:00:00 2001
+From: Etienne Carriere <etienne.carriere@linaro.org>
+Date: Tue, 26 May 2020 11:10:45 +0200
+Subject: [PATCH 2/2] scripts/pem_to_pub.py: use Cryptodome module instead of
+ Crypto
+
+Upgrade scripts/pem_to_pub.py to use module Cryptodome instead of
+module Crypto for consistency with the other helper Python scripts
+of OP-TEE OS package.
+
+Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
+Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
+---
+ scripts/pem_to_pub_c.py | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/scripts/pem_to_pub_c.py b/scripts/pem_to_pub_c.py
+index 3a896a393..d3f0e5006 100755
+--- a/scripts/pem_to_pub_c.py
++++ b/scripts/pem_to_pub_c.py
+@@ -21,8 +21,8 @@ def get_args():
+ 
+ def main():
+     import array
+-    from Crypto.PublicKey import RSA
+-    from Crypto.Util.number import long_to_bytes
++    from Cryptodome.PublicKey import RSA
++    from Cryptodome.Util.number import long_to_bytes
+ 
+     args = get_args()
+ 
+-- 
+2.17.1
+
diff --git a/boot/optee-os/0001-scripts-pem_to_pub_c.py-sign.py-use-pycryptodomex.patch b/boot/optee-os/0001-scripts-pem_to_pub_c.py-sign.py-use-pycryptodomex.patch
deleted file mode 100644
index 1ce960e0e3..0000000000
--- a/boot/optee-os/0001-scripts-pem_to_pub_c.py-sign.py-use-pycryptodomex.patch
+++ /dev/null
@@ -1,64 +0,0 @@
-From 06e71feaeb08349abe56b50c3dfb08a8341cf55f Mon Sep 17 00:00:00 2001
-From: Romain Naour <romain.naour@gmail.com>
-Date: Sun, 26 Apr 2020 21:55:55 +0200
-Subject: [PATCH] scripts/pem_to_pub_c.py/sign.py: use pycryptodomex
-
-These scripts still use pycrypto.
-
-From [1]:
-"PyCryptodome is a fork of PyCrypto, which is not maintained any more
-(the last release dates back to 2013 [2]). It exposes almost the same
-API, but there are a few incompatibilities [3]."
-
-Don't use upstream commit since it also switches from the algorithm
-TEE_ALG_RSASSA_PKCS1_V1_5_SHA256 to TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA256
-when replacing pycrypto to pycryptodomex [4].
-
-[1] https://github.com/OP-TEE/optee_os/commit/90ad2450436fdd9fc0d28a3f92f3fbcfd89a38f0
-[2] https://pypi.org/project/pycrypto/#history
-[3] https://pycryptodome.readthedocs.io/en/latest/src/vs_pycrypto.html
-[4] https://github.com/OP-TEE/optee_os/commit/ababd72d2fd76cb2ded8e202b49db28d6545f6eb
-
-Signed-off-by: Romain Naour <romain.naour@gmail.com>
----
- scripts/pem_to_pub_c.py | 4 ++--
- scripts/sign.py         | 8 ++++----
- 2 files changed, 6 insertions(+), 6 deletions(-)
-
-diff --git a/scripts/pem_to_pub_c.py b/scripts/pem_to_pub_c.py
-index 3a896a39..d3f0e500 100755
---- a/scripts/pem_to_pub_c.py
-+++ b/scripts/pem_to_pub_c.py
-@@ -21,8 +21,8 @@ def get_args():
- 
- def main():
-     import array
--    from Crypto.PublicKey import RSA
--    from Crypto.Util.number import long_to_bytes
-+    from Cryptodome.PublicKey import RSA
-+    from Cryptodome.Util.number import long_to_bytes
- 
-     args = get_args()
- 
-diff --git a/scripts/sign.py b/scripts/sign.py
-index 2939c591..80ce2e9f 100755
---- a/scripts/sign.py
-+++ b/scripts/sign.py
-@@ -121,10 +121,10 @@ def get_args(logger):
- 
- 
- def main():
--    from Crypto.Signature import PKCS1_v1_5
--    from Crypto.Hash import SHA256
--    from Crypto.PublicKey import RSA
--    from Crypto.Util.number import ceil_div
-+    from Cryptodome.Signature import PKCS1_v1_5
-+    from Cryptodome.Hash import SHA256
-+    from Cryptodome.PublicKey import RSA
-+    from Cryptodome.Util.number import ceil_div
-     import base64
-     import logging
-     import os
--- 
-2.25.3
-
diff --git a/boot/optee-os/0002-config.mk-fix-CFG_OPTEE_REVISION_MINOR.patch b/boot/optee-os/0002-config.mk-fix-CFG_OPTEE_REVISION_MINOR.patch
new file mode 100644
index 0000000000..26652d3bc4
--- /dev/null
+++ b/boot/optee-os/0002-config.mk-fix-CFG_OPTEE_REVISION_MINOR.patch
@@ -0,0 +1,32 @@
+From c5f5e6bf6644a536a0d53bfb9f5c5419150035dd Mon Sep 17 00:00:00 2001
+From: Jens Wiklander <jens.wiklander@linaro.org>
+Date: Mon, 25 May 2020 12:20:08 +0200
+Subject: [PATCH 1/2] config.mk: fix CFG_OPTEE_REVISION_MINOR
+
+The current release is 3.9.0, change the revision to match.
+
+Fixes: af141c61fe7a ("Update CHANGELOG for 3.9.0")
+Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
+Reported-by: Etienne Carriere <etienne.carriere@linaro.org>
+Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
+Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
+---
+ mk/config.mk | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/mk/config.mk b/mk/config.mk
+index c00a14618..bc49f83d8 100644
+--- a/mk/config.mk
++++ b/mk/config.mk
+@@ -116,7 +116,7 @@ endif
+ # with limited depth not including any tag, so there is really no guarantee
+ # that TEE_IMPL_VERSION contains the major and minor revision numbers.
+ CFG_OPTEE_REVISION_MAJOR ?= 3
+-CFG_OPTEE_REVISION_MINOR ?= 8
++CFG_OPTEE_REVISION_MINOR ?= 9
+ 
+ # Trusted OS implementation manufacturer name
+ CFG_TEE_MANUFACTURER ?= LINARO
+-- 
+2.17.1
+
diff --git a/boot/optee-os/Config.in b/boot/optee-os/Config.in
index 669bbda924..5a786833ef 100644
--- a/boot/optee-os/Config.in
+++ b/boot/optee-os/Config.in
@@ -18,7 +18,7 @@ choice
 	  Select the version of OP-TEE OS you want to use
 
 config BR2_TARGET_OPTEE_OS_LATEST
-	bool "3.7.0"
+	bool "3.9.0"
 	help
 	  Use the latest release tag from the OP-TEE OS official Git
 	  repository.
@@ -50,7 +50,7 @@ endif
 
 config BR2_TARGET_OPTEE_OS_VERSION
 	string
-	default "3.7.0"		if BR2_TARGET_OPTEE_OS_LATEST
+	default "3.9.0"		if BR2_TARGET_OPTEE_OS_LATEST
 	default BR2_TARGET_OPTEE_OS_CUSTOM_REPO_VERSION \
 				if BR2_TARGET_OPTEE_OS_CUSTOM_GIT
 
diff --git a/boot/optee-os/optee-os.hash b/boot/optee-os/optee-os.hash
index dc0fbecce7..f38ebc569f 100644
--- a/boot/optee-os/optee-os.hash
+++ b/boot/optee-os/optee-os.hash
@@ -1,4 +1,4 @@
-# From https://github.com/OP-TEE/optee_os/archive/3.7.0.tar.gz
-sha256 ff378f22b8e7dacf933a2d34eb5c1bdcafe74bdda692e4dbc2969301f6a81d43  optee-os-3.7.0.tar.gz
+# From https://github.com/OP-TEE/optee_os/archive/3.9.0.tar.gz
+sha256 ac6f145ebde715d4d7a1d5277f4e08a06b660e1c0237c926a274d86cd90ef4c5  optee-os-3.9.0.tar.gz
 # Locally computed
 sha256 1247ee90858f4037b6cac63cbffddfed435d0d73c631b37d78c1e6e6ab3e5d1a  LICENSE
