diff --git a/ble_lbs/ble_lbs.c b/ble_lbs/ble_lbs.c
index f2a72f9..c255ede 100644
--- a/ble_lbs/ble_lbs.c
+++ b/ble_lbs/ble_lbs.c
@@ -107,8 +107,8 @@ uint32_t ble_lbs_init(ble_lbs_t * p_lbs, const ble_lbs_init_t * p_lbs_init)
     add_char_params.char_props.read   = 1;
     add_char_params.char_props.notify = 1;
 
-    add_char_params.read_access       = SEC_OPEN;
-    add_char_params.cccd_write_access = SEC_OPEN;
+    add_char_params.read_access       = SEC_JUST_WORKS;
+    add_char_params.cccd_write_access = SEC_JUST_WORKS;
 
     err_code = characteristic_add(p_lbs->service_handle,
                                   &add_char_params,
@@ -127,8 +127,8 @@ uint32_t ble_lbs_init(ble_lbs_t * p_lbs, const ble_lbs_init_t * p_lbs_init)
     add_char_params.char_props.read  = 1;
     add_char_params.char_props.write = 1;
 
-    add_char_params.read_access  = SEC_OPEN;
-    add_char_params.write_access = SEC_OPEN;
+    add_char_params.read_access  = SEC_JUST_WORKS;
+    add_char_params.write_access = SEC_JUST_WORKS;
 
     return characteristic_add(p_lbs->service_handle, &add_char_params, &p_lbs->led_char_handles);
 }