diff --git a/platform_specific/ubuntu/YamlParameters.cpp b/platform_specific/ubuntu/YamlParameters.cpp
index 86b2b2a..a30959f 100644
--- a/platform_specific/ubuntu/YamlParameters.cpp
+++ b/platform_specific/ubuntu/YamlParameters.cpp
@@ -178,9 +178,9 @@ int8_t YamlParameters::__read_page(std::ifstream& params_storage_file, uint16_t*
                 return LIBPARAMS_WRONG_ARGS;
             }
 
-            memcpy((void*)(flash.memory_ptr + offset), str_value.c_str(),
-                   strlen(str_value.c_str()));
-            memcpy((void*)(flash.memory_ptr + offset + strlen(str_value.c_str())), "\0", 1);
+            size_t len = str_value.size();
+            memcpy((void*)(flash.memory_ptr + offset), str_value.c_str(), len);
+            memcpy((void*)(flash.memory_ptr + offset + len), "\0", 1);
             *str_param_idx = *str_param_idx + 1;
         }
     }
diff --git a/scripts/params.py b/scripts/params.py
index 3268aa9..2ea0465 100755
--- a/scripts/params.py
+++ b/scripts/params.py
@@ -11,11 +11,12 @@
 import sys
 from dataclasses import dataclass
 from color_logging import log_warn, log_err
+from typing import Union
 
 @dataclass
 class BaseParam:
     name: str = ""
-    default: int | str = 0
+    default: Union[int, str] = 0
     note: str = ""
     mutability: str = "MUTABLE"
     enum_name: str = ""