diff --git a/puzzle_generator/_ea_configurators/eac_simple/eacs_simple.py b/puzzle_generator/_ea_configurators/eac_simple/eacs_simple.py
index b6e556f..1da7b73 100644
--- a/puzzle_generator/_ea_configurators/eac_simple/eacs_simple.py
+++ b/puzzle_generator/_ea_configurators/eac_simple/eacs_simple.py
@@ -35,7 +35,7 @@ def get_constants_str(
         )
         _signature_params = "_SIGNATURE_PARAMS = " + repr(self._signature_params)
         decrypt: str = "_DECRYPT = get_decrypt(_SCRYPT_PARAMS, _SIGNATURE_PARAMS)"
-        return "\n".join([_scrypt_params, _signature_params, decrypt])
+        return f"{_scrypt_params}\n{_signature_params}\n{decrypt}"
 
     @property
     def bu_configurator(self):
diff --git a/puzzle_generator/_ea_configurators/eac_simple/eacs_spiced.py b/puzzle_generator/_ea_configurators/eac_simple/eacs_spiced.py
index 1de9e01..90c3e7d 100644
--- a/puzzle_generator/_ea_configurators/eac_simple/eacs_spiced.py
+++ b/puzzle_generator/_ea_configurators/eac_simple/eacs_spiced.py
@@ -74,8 +74,12 @@ def get_constants_str(
             "_SIGNATURE_SPICES, "
             "_SCRYPT_PARAMS, _SIGNATURE_PARAMS)"
         )
-        return "\n".join(
-            [proc_spices, signature_spices, _scrypt_params, _signature_params, decrypt]
+        return (
+            f"{proc_spices}\n"
+            f"{signature_spices}\n"
+            f"{_scrypt_params}\n"
+            f"{_signature_params}\n"
+            f"{decrypt}"
         )
 
     @property
diff --git a/puzzle_generator/_puzzle_data_encryption.py b/puzzle_generator/_puzzle_data_encryption.py
index c77c0bc..d88d82a 100644
--- a/puzzle_generator/_puzzle_data_encryption.py
+++ b/puzzle_generator/_puzzle_data_encryption.py
@@ -7,7 +7,7 @@ def encrypt_data(
     in_data, in_encrypt: typing.Callable[[bytes, bytes], bytes]
 ) -> tuple[str, bytes]:
     if list(in_data.keys()) == ["str"]:
-        return in_data["str"], bytes()
+        return in_data["str"], b""
     tmp = encrypt_data(in_data["rest"], in_encrypt)
     rest = join(tmp[0], tmp[1])
     encrypted = in_encrypt(rest, in_data["pass"].encode())
@@ -29,7 +29,7 @@ def encrypt_data_with_hints(
     in_data, in_encrypt: typing.Callable[[bytes, bytes], bytes]
 ) -> tuple[str, int, bytes]:
     if list(in_data.keys()) == ["str"]:
-        return in_data["str"], 0, bytes()
+        return in_data["str"], 0, b""
     tmp = encrypt_data_with_hints(in_data["rest"], in_encrypt)
     rest = join_with_hints(tmp[0], tmp[1], tmp[2])
     encrypted = in_encrypt(rest, in_data["pass"].encode())
diff --git a/pyproject.toml b/pyproject.toml
index be34250..edf7c6b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ mypy = "2.3.0"
 pylint = "4.0.6"
 pyright = {extras = ["nodejs"], version = "1.1.411"}
 pytest = "9.1.1"
-ruff = "0.15.22"
+ruff = "0.16.0"
 xenon = "0.9.3"
 
 [build-system]