diff --git a/samples/bluetooth/mesh_provisioner/prj.conf b/samples/bluetooth/mesh_provisioner/prj.conf
index 24176780516..0e5f6490ede 100644
--- a/samples/bluetooth/mesh_provisioner/prj.conf
+++ b/samples/bluetooth/mesh_provisioner/prj.conf
@@ -1,6 +1,10 @@
 #CONFIG_INIT_STACKS=y
-CONFIG_MAIN_STACK_SIZE=2048
-CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
+# Stack sizes from thread analysis + 50% margin, rounded to nearest 100
+CONFIG_MAIN_STACK_SIZE=4400
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4800
+CONFIG_BT_MESH_SETTINGS_WORKQ_STACK_SIZE=1700
+CONFIG_BT_MESH_ADV_STACK_SIZE=4000
+CONFIG_BT_RX_STACK_SIZE=3300
 # The Bluetooth API should not be used from a preemptive thread:
 CONFIG_MAIN_THREAD_PRIORITY=-2