diff --git a/isar-patches/0001-meta-optee-client-Generalize-and-update-shutdown-rul.patch b/isar-patches/0001-meta-optee-client-Generalize-and-update-shutdown-rul.patch
deleted file mode 100644
index 00aa5a662..000000000
--- a/isar-patches/0001-meta-optee-client-Generalize-and-update-shutdown-rul.patch
+++ /dev/null
@@ -1,36 +0,0 @@
-From 2dde60388814aa09d85714375a06ef1e0688f16d Mon Sep 17 00:00:00 2001
-From: Jan Kiszka <jan.kiszka@siemens.com>
-Date: Wed, 11 Oct 2023 16:04:53 +0200
-Subject: [PATCH] meta: optee-client: Generalize and update shutdown rule
-
-First, naming changed somewhere between kernel 5.10 and 6.1 so that
-optee-ta-bc50d971... is now optee-ta-supp-bc50d971...
-
-And then we should account for possibly more devices that need to be
-unbound. Use POSIX-compliant shell code for this.
-
-The generic loop allows to drop the explicit unmounting of efivarfs
-because the corresponding driver will already get unbound.
-
-Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
----
- .../optee-client/files/debian/tee-supplicant.service           | 3 +--
- 1 file changed, 1 insertion(+), 2 deletions(-)
-
-diff --git a/meta/recipes-bsp/optee-client/files/debian/tee-supplicant.service b/meta/recipes-bsp/optee-client/files/debian/tee-supplicant.service
-index cc92a5fd..d8b630a4 100644
---- a/meta/recipes-bsp/optee-client/files/debian/tee-supplicant.service
-+++ b/meta/recipes-bsp/optee-client/files/debian/tee-supplicant.service
-@@ -13,8 +13,7 @@ Type=oneshot
- RemainAfterExit=yes
- # Start if not already started by the initramfs hook
- ExecStart=/bin/sh -c '/usr/bin/pgrep tee-supplicant >/dev/null || /usr/sbin/tee-supplicant -d'
--ExecStop=/bin/sh -c '/usr/bin/findmnt /sys/firmware/efi/efivars >/dev/null && /usr/bin/umount /sys/firmware/efi/efivars || true'
--ExecStop=/bin/sh -c 'echo -n optee-ta-bc50d971-d4c9-42c4-82cb-343fb7f37896 > /sys/bus/tee/drivers/optee-ftpm/unbind || true'
-+ExecStop=/bin/sh -c 'for dev in /sys/bus/tee/devices/*; do case "$dev" in *optee-ta-*) basename "$dev" > "$dev"/driver/unbind;; esac done'
- ExecStop=/usr/bin/pkill tee-supplicant
- 
- [Install]
--- 
-2.35.3
-
diff --git a/isar-patches/0001-optee-client-Fix-native-arm64-build.patch b/isar-patches/0001-optee-client-Fix-native-arm64-build.patch
deleted file mode 100644
index 3a671428c..000000000
--- a/isar-patches/0001-optee-client-Fix-native-arm64-build.patch
+++ /dev/null
@@ -1,31 +0,0 @@
-From fce7e3667affe5fce82381baeb473dd7342bf00d Mon Sep 17 00:00:00 2001
-From: Jan Kiszka <jan.kiszka@siemens.com>
-Date: Tue, 3 Oct 2023 21:42:55 +0200
-Subject: [PATCH] optee-client: Fix native arm64 build
-
-optee-client sets CROSS_COMPILE to arm-linux-gnueabihf- by default,
-causing breakages when building natively, e.g. on arm64. Fix this by
-simply setting CROSS_COMPILE unconditionally.
-
-Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
----
- meta/recipes-bsp/optee-client/files/debian/rules.tmpl | 2 --
- 1 file changed, 2 deletions(-)
-
-diff --git a/meta/recipes-bsp/optee-client/files/debian/rules.tmpl b/meta/recipes-bsp/optee-client/files/debian/rules.tmpl
-index 1b7920d0..7d1b335b 100755
---- a/meta/recipes-bsp/optee-client/files/debian/rules.tmpl
-+++ b/meta/recipes-bsp/optee-client/files/debian/rules.tmpl
-@@ -7,9 +7,7 @@
- #
- # SPDX-License-Identifier: MIT
- 
--ifneq ($(DEB_BUILD_GNU_TYPE),$(DEB_HOST_GNU_TYPE))
- export CROSS_COMPILE=$(DEB_HOST_GNU_TYPE)-
--endif
- 
- %:
- 	dh $@ --exclude=.a
--- 
-2.35.3
-
diff --git a/kas/iot2050.yml b/kas/iot2050.yml
index c49a06cd8..2a56429f6 100644
--- a/kas/iot2050.yml
+++ b/kas/iot2050.yml
@@ -27,15 +27,11 @@ repos:
 
   isar:
     url: https://github.com/ilbers/isar
-    commit: 6b6c74411074e3d3a08f044e681c3f1216727b6e
+    commit: 83644ddf694e51f11793e6107e4aaf68dc0043a5
     layers:
       meta:
     patches:
       01:
-        path: isar-patches/0001-optee-client-Fix-native-arm64-build.patch
-      02:
-        path: isar-patches/0001-meta-optee-client-Generalize-and-update-shutdown-rul.patch
-      03:
         path: isar-patches/0001-dpkg-source-Drop-I-filter.patch
 
   cip-core: