diff --git a/src/ytdl_sub/validators/string_formatter_validators.py b/src/ytdl_sub/validators/string_formatter_validators.py
index 53fbc0dc..77ed8f75 100644
--- a/src/ytdl_sub/validators/string_formatter_validators.py
+++ b/src/ytdl_sub/validators/string_formatter_validators.py
@@ -10,7 +10,7 @@ from yt_dlp.utils import sanitize_filename
 from ytdl_sub.utils.exceptions import InvalidVariableNameException
 from ytdl_sub.utils.exceptions import StringFormattingException
 from ytdl_sub.utils.exceptions import StringFormattingVariableNotFoundException
-from ytdl_sub.validators.validators import ListValidator
+from ytdl_sub.validators.validators import ListValidator, StringValidator
 from ytdl_sub.validators.validators import LiteralDictValidator
 from ytdl_sub.validators.validators import Validator
 
@@ -47,7 +47,7 @@ def is_valid_source_variable_name(input_str: str, raise_exception: bool = False)
     return is_source_variable_name
 
 
-class StringFormatterValidator(Validator):
+class StringFormatterValidator(StringValidator):
     """
     String that can use
     :class:`source variables <ytdl_sub.entries.variables.entry_variables.SourceVariables>`
@@ -73,7 +73,6 @@ class StringFormatterValidator(Validator):
     and would resolve to something like ``sweet_tv_show.s2022.e502.mp4``.
     """
 
-    _expected_value_type = str
     _expected_value_type_name = "format string"
     _variable_not_found_error_msg_formatter = (
         "Format variable '{variable_name}' does not exist. Available variables: {available_fields}"
diff --git a/src/ytdl_sub/validators/validators.py b/src/ytdl_sub/validators/validators.py
index 1220cfca..5bd4dbaa 100644
--- a/src/ytdl_sub/validators/validators.py
+++ b/src/ytdl_sub/validators/validators.py
@@ -138,6 +138,12 @@ class StringValidator(ValueValidator[str]):
     _expected_value_type = str
     _expected_value_type_name = "string"
 
+    def __init__(self, name: str, value: Any):
+        if isinstance(value, (int, float, bool)):
+            value = str(value)
+
+        super().__init__(name, value)
+
 
 class FloatValidator(ValueValidator[float]):
     _expected_value_type = (int, float)
diff --git a/tests/unit/validators/test_string_validator.py b/tests/unit/validators/test_string_validator.py
index b495bdef..93b930b6 100644
--- a/tests/unit/validators/test_string_validator.py
+++ b/tests/unit/validators/test_string_validator.py
@@ -4,12 +4,12 @@ from ytdl_sub.utils.exceptions import ValidationException
 from ytdl_sub.validators.validators import StringValidator
 
 
-@pytest.mark.parametrize("value", ["a", "unicode 💩", ""])
+@pytest.mark.parametrize("value", ["a", "unicode 💩", "", 1, 3.14, True, False])
 def test_string_validator(value):
     string_validator = StringValidator(name="good_str_validator", value=value)
     assert string_validator._name == "good_str_validator"
-    assert string_validator._value == value
-    assert string_validator.value == value
+    assert string_validator._value == str(value)
+    assert string_validator.value == str(value)
 
 
 @pytest.mark.parametrize("value", [None, {}, True, 0])