diff --git a/meta-digi-arm/dynamic-layers/stm-st-stm32mp/recipes-security/optee/optee-os-stm32mp_4.0.0.bbappend b/meta-digi-arm/dynamic-layers/stm-st-stm32mp/recipes-security/optee/optee-os-stm32mp_4.0.0.bbappend
index 6026d0e8c..b4c26bffb 100644
--- a/meta-digi-arm/dynamic-layers/stm-st-stm32mp/recipes-security/optee/optee-os-stm32mp_4.0.0.bbappend
+++ b/meta-digi-arm/dynamic-layers/stm-st-stm32mp/recipes-security/optee/optee-os-stm32mp_4.0.0.bbappend
@@ -12,7 +12,7 @@ OPTEE_URI_STASH = "${DIGI_MTK_GIT}/emp/optee_os.git;protocol=ssh"
 OPTEE_URI_GITHUB = "${DIGI_GITHUB_GIT}/optee_os.git;protocol=https"
 OPTEE_GIT_URI ?= "${@oe.utils.conditional('DIGI_INTERNAL_GIT', '1' , '${OPTEE_URI_STASH}', '${OPTEE_URI_GITHUB}', d)}"
 
-SRCBRANCH = "4.0.0/stm/master"
+SRCBRANCH = "4.0.0/stm/maint"
 SRCREV = "${AUTOREV}"
 
 SRC_URI = " \