diff --git a/parameters_validation/validate_parameters_decorator.py b/parameters_validation/validate_parameters_decorator.py
index 877f496..7aea24b 100644
--- a/parameters_validation/validate_parameters_decorator.py
+++ b/parameters_validation/validate_parameters_decorator.py
@@ -33,6 +33,6 @@ def validate_parameters(func):
                 continue
             annotation(parameters[parameter], parameter)
 
-        func(*args, **kwargs)
+        return func(*args, **kwargs)
 
     return wrapper
diff --git a/setup.py b/setup.py
index 884467f..efdb614 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@ extras = {
 
 setup(
     name='parameters-validation',
-    version='1.1.0',
+    version='1.1.1',
     packages=['parameters_validation'],
     url='https://github.com/allrod5/parameters-validation',
     license='MIT',

Decorated function can not return right value. 
I think I found a bug.

**How to reproduce:**
```python
from parameters_validation import non_null, validate_parameters

@validate_parameters
def concat(front: str, back: non_null(str)):
    result = None
    if front:
        result = front + '-' + back
    print('inner_result = {}'.format(result))
    return result

result_str = concat('one' , 'two')
print('outer_result = {}'.format(result_str)
```
step 1: Run above coce
step 2: 'inner_result' should be same with 'outer_result'.  But they are different
step 3: If you comment out '@validate_parameters' line, the output has no problem.

diff --git a/test/__init__.py b/tests/__init__.py
similarity index 100%
rename from test/__init__.py
rename to tests/__init__.py
diff --git a/tests/bugfixes/__init__.py b/tests/bugfixes/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/bugfixes/test_return_value_is_preserved.py b/tests/bugfixes/test_return_value_is_preserved.py
new file mode 100644
index 0000000..af96bc4
--- /dev/null
+++ b/tests/bugfixes/test_return_value_is_preserved.py
@@ -0,0 +1,27 @@
+"""
+This test covers a fix for a bug first reported in
+https://github.com/allrod5/parameters-validation/issues/2
+
+In version 1.1.0 a function annotated with decorator
+@validate_parameters would return None regardless of it's actual
+return value
+
+This bug was fixed in version 1.1.1
+"""
+from parameters_validation import non_null, validate_parameters
+
+
+def test_return_value_is_preserved():
+    # given
+    @validate_parameters
+    def guinea_pig(front: str, back: non_null(str)):
+        result = None
+        if front:
+            result = front + '-' + back
+        return result
+
+    # when
+    return_value = guinea_pig("one", "two")
+
+    # then
+    assert return_value == "one-two"

pip install -e .[test]
parse_log_pytest
requirements.txt
pytest
apt-get update apt-get install -y gcc
3.7
requirements.txt
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
certifi @ file:///croot/certifi_1671487769961/work/certifi
charset-normalizer==3.4.1
coverage==6.5.0
coveralls==3.3.1
docopt==0.6.2
exceptiongroup==1.2.2
idna==3.10
importlib-metadata==6.7.0
iniconfig==2.0.0
packaging==24.0
-e git+https://github.com/allrod5/parameters-validation.git@8a36fbaa01780960d8963fba35aae3f06efcc6a5#egg=parameters_validation
pluggy==1.2.0
pytest==7.4.4
pytest-cov==4.1.0
requests==2.31.0
tomli==2.0.1
typing_extensions==4.7.1
urllib3==2.0.7
zipp==3.15.0

name: parameters-validation
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - certifi=2022.12.7=py37h06a4308_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.4.4=h6a678d5_1
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=1.1.1w=h7f8727e_0
  - pip=22.3.1=py37h06a4308_0
  - python=3.7.16=h7a1cb2a_0
  - readline=8.2=h5eee18b_0
  - setuptools=65.6.3=py37h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - wheel=0.38.4=py37h06a4308_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - charset-normalizer==3.4.1
      - coverage==6.5.0
      - coveralls==3.3.1
      - docopt==0.6.2
      - exceptiongroup==1.2.2
      - idna==3.10
      - importlib-metadata==6.7.0
      - iniconfig==2.0.0
      - packaging==24.0
      - pluggy==1.2.0
      - pytest==7.4.4
      - pytest-cov==4.1.0
      - requests==2.31.0
      - tomli==2.0.1
      - typing-extensions==4.7.1
      - urllib3==2.0.7
      - zipp==3.15.0
prefix: /opt/conda/envs/parameters-validation

tests/bugfixes/test_return_value_is_preserved.py::test_return_value_is_preserved
parameters_validation/validate_parameters_decorator.py setup.py
parameters_validation/validate_parameters_decorator.py setup.py