diff --git a/drivers/bluetooth/hci/slz_hci.c b/drivers/bluetooth/hci/slz_hci.c
index 59bd8ba5ff9..d80de8be998 100644
--- a/drivers/bluetooth/hci/slz_hci.c
+++ b/drivers/bluetooth/hci/slz_hci.c
@@ -16,11 +16,12 @@
 #include <zephyr/logging/log.h>
 LOG_MODULE_REGISTER(bt_hci_driver_slz);
 
-#define SL_BT_CONFIG_ACCEPT_LIST_SIZE	1
-#define SL_BT_CONFIG_MAX_CONNECTIONS	1
-#define SL_BT_CONFIG_USER_ADVERTISERS	1
-#define SL_BT_CONTROLLER_BUFFER_MEMORY  CONFIG_BT_SILABS_HCI_BUFFER_MEMORY
-#define SL_BT_SILABS_LL_STACK_SIZE	1024
+#define SL_BT_CONFIG_ACCEPT_LIST_SIZE		1
+#define SL_BT_CONFIG_MAX_CONNECTIONS		1
+#define SL_BT_CONFIG_USER_ADVERTISERS		1
+#define SL_BT_CONTROLLER_BUFFER_MEMORY		CONFIG_BT_SILABS_HCI_BUFFER_MEMORY
+#define SL_BT_CONTROLLER_LE_BUFFER_SIZE_MAX	CONFIG_BT_BUF_ACL_TX_COUNT
+#define SL_BT_SILABS_LL_STACK_SIZE		1024
 
 static K_KERNEL_STACK_DEFINE(slz_ll_stack, SL_BT_SILABS_LL_STACK_SIZE);
 static struct k_thread slz_ll_thread;
@@ -135,6 +136,8 @@ static int slz_bt_open(void)
 		return -ENOMEM;
 	}
 
+	sl_btctrl_configure_le_buffer_size(SL_BT_CONTROLLER_LE_BUFFER_SIZE_MAX);
+
 	ret = sl_btctrl_init_ll();
 	if (ret) {
 		LOG_ERR("Bluetooth link layer init failed %d", ret);
diff --git a/west.yml b/west.yml
index 85ee1533f95..3d76e4dc6a3 100644
--- a/west.yml
+++ b/west.yml
@@ -219,7 +219,7 @@ manifest:
       groups:
         - hal
     - name: hal_silabs
-      revision: d184c2ccc0ec5a7189d6d5cb7645c7f9bd38c2b5
+      revision: 20113e9520ce59ee7fa85ba10102d0880822bb3e
       path: modules/hal/silabs
       groups:
         - hal