diff --git a/isar-patches/0001-dpkg-source-Drop-I-filter.patch b/isar-patches/0001-dpkg-source-Drop-I-filter.patch
new file mode 100644
index 000000000..9a734a4fe
--- /dev/null
+++ b/isar-patches/0001-dpkg-source-Drop-I-filter.patch
@@ -0,0 +1,30 @@
+From f8f39f9722ebc24cd41e6c41bb22f8ebe9295414 Mon Sep 17 00:00:00 2001
+From: Jan Kiszka <jan.kiszka@siemens.com>
+Date: Thu, 12 Oct 2023 13:17:32 +0200
+Subject: [PATCH] dpkg-source: Drop -I filter
+
+This is a regression of 38b832ad8248 which added this while factoring
+out this step. However, some packages may break over this, e.g. the
+edk2-standalonemm-rpmb recipe in isar-cip-core.
+
+Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
+---
+ meta/classes/dpkg-source.bbclass | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/meta/classes/dpkg-source.bbclass b/meta/classes/dpkg-source.bbclass
+index 1f4f8164..a86b4635 100644
+--- a/meta/classes/dpkg-source.bbclass
++++ b/meta/classes/dpkg-source.bbclass
+@@ -12,7 +12,7 @@ do_dpkg_source() {
+     if [ ! -z "${SOURCE_DATE_EPOCH}" ]; then
+         export SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH}"
+     fi
+-    sh -c "cd ${WORKDIR}; dpkg-source -I -b ${PPS}"
++    sh -c "cd ${WORKDIR}; dpkg-source -b ${PPS}"
+ }
+ addtask dpkg_source after do_prepare_build before do_dpkg_build
+ 
+-- 
+2.35.3
+
diff --git a/kas/iot2050.yml b/kas/iot2050.yml
index e6de729cb..717ffe7b7 100644
--- a/kas/iot2050.yml
+++ b/kas/iot2050.yml
@@ -27,7 +27,7 @@ repos:
 
   isar:
     url: https://github.com/ilbers/isar
-    commit: ecc7cae423a828d294575301c1584fbe303cba3e
+    commit: 6b6c74411074e3d3a08f044e681c3f1216727b6e
     layers:
       meta:
     patches:
@@ -35,10 +35,12 @@ repos:
         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:
     url: https://gitlab.com/cip-project/cip-core/isar-cip-core.git
-    commit: 7d3a05b3351726c5c76912f5c73d4720f4a46b18
+    commit: 3d8e24c0cc6cb811b57648bd356bce2ae5e94795
 
 local_conf_header:
   standard: |