diff --git a/src/logic/scripting/lua/libs/libfile.cpp b/src/logic/scripting/lua/libs/libfile.cpp
index a27ac949..a38081c9 100644
--- a/src/logic/scripting/lua/libs/libfile.cpp
+++ b/src/logic/scripting/lua/libs/libfile.cpp
@@ -149,27 +149,6 @@ static int l_read_bytes(lua::State* L) {
     );
 }
 
-static void read_bytes_from_table(
-    lua::State* L, int tableIndex, std::vector<ubyte>& bytes
-) {
-    if (!lua::istable(L, tableIndex)) {
-        throw std::runtime_error("table expected");
-    } else {
-        size_t size = lua::objlen(L, tableIndex);
-        for (size_t i = 0; i < size; i++) {
-            lua::rawgeti(L, i + 1, tableIndex);
-            const int byte = lua::tointeger(L, -1);
-            lua::pop(L);
-            if (byte < 0 || byte > 255) {
-                throw std::runtime_error(
-                    "invalid byte '" + std::to_string(byte) + "'"
-                );
-            }
-            bytes.push_back(byte);
-        }
-    }
-}
-
 static int l_write_bytes(lua::State* L) {
     fs::path path = get_writeable_path(L);
 
@@ -181,7 +160,7 @@ static int l_write_bytes(lua::State* L) {
     }
 
     std::vector<ubyte> bytes;
-    read_bytes_from_table(L, 2, bytes);
+    lua::read_bytes_from_table(L, 2, bytes);
     return lua::pushboolean(
         L, files::write_bytes(path, bytes.data(), bytes.size())
     );
@@ -223,7 +202,7 @@ static int l_list(lua::State* L) {
 static int l_gzip_compress(lua::State* L) {
     std::vector<ubyte> bytes;
 
-    read_bytes_from_table(L, 1, bytes);
+    lua::read_bytes_from_table(L, 1, bytes);
     auto compressed_bytes = gzip::compress(bytes.data(), bytes.size());
     int newTable = lua::gettop(L);
 
@@ -237,7 +216,7 @@ static int l_gzip_compress(lua::State* L) {
 static int l_gzip_decompress(lua::State* L) {
     std::vector<ubyte> bytes;
 
-    read_bytes_from_table(L, 1, bytes);
+    lua::read_bytes_from_table(L, 1, bytes);
     auto decompressed_bytes = gzip::decompress(bytes.data(), bytes.size());
     int newTable = lua::gettop(L);
 
diff --git a/src/logic/scripting/lua/lua_util.hpp b/src/logic/scripting/lua/lua_util.hpp
index 983abb39..f9da3b21 100644
--- a/src/logic/scripting/lua/lua_util.hpp
+++ b/src/logic/scripting/lua/lua_util.hpp
@@ -2,6 +2,7 @@
 
 #include <typeindex>
 #include <typeinfo>
+#include <stdexcept>
 #include <unordered_map>
 
 #include "data/dv.hpp"
@@ -698,4 +699,25 @@ namespace lua {
         }
         return def;
     }
+
+    inline void read_bytes_from_table(
+        lua::State* L, int tableIndex, std::vector<ubyte>& bytes
+    ) {
+        if (!lua::istable(L, tableIndex)) {
+            throw std::runtime_error("table expected");
+        } else {
+            size_t size = lua::objlen(L, tableIndex);
+            for (size_t i = 0; i < size; i++) {
+                lua::rawgeti(L, i + 1, tableIndex);
+                const int byte = lua::tointeger(L, -1);
+                lua::pop(L);
+                if (byte < 0 || byte > 255) {
+                    throw std::runtime_error(
+                        "invalid byte '" + std::to_string(byte) + "'"
+                    );
+                }
+                bytes.push_back(byte);
+            }
+        }
+    }
 }
diff --git a/src/logic/scripting/lua/usertypes/lua_type_bytearray.cpp b/src/logic/scripting/lua/usertypes/lua_type_bytearray.cpp
index 0493995b..c982d2d8 100644
--- a/src/logic/scripting/lua/usertypes/lua_type_bytearray.cpp
+++ b/src/logic/scripting/lua/usertypes/lua_type_bytearray.cpp
@@ -2,6 +2,7 @@
 
 #include <sstream>
 
+#include "util/listutil.hpp"
 #include "../lua_util.hpp"
 
 using namespace lua;
@@ -18,8 +19,16 @@ LuaBytearray::~LuaBytearray() {
 
 static int l_append(lua::State* L) {
     if (auto buffer = touserdata<LuaBytearray>(L, 1)) {
-        auto value = tointeger(L, 2);
-        buffer->data().push_back(static_cast<ubyte>(value));
+        if (lua::isnumber(L, 2)) {
+            auto value = tointeger(L, 2);
+            buffer->data().push_back(static_cast<ubyte>(value));
+        } else if (lua::istable(L, 2)) {
+            lua::read_bytes_from_table(L, 2, buffer->data());
+        } else if (auto extension = lua::touserdata<LuaBytearray>(L, 2)) {
+            util::concat(buffer->data(), extension->data());
+        } else {
+            throw std::runtime_error("integer/table/Bytearray expected");
+        }
     }
     return 0;
 }