diff --git a/documentation/changelog.rst b/documentation/changelog.rst
index acf39dfd5..823f2a867 100644
--- a/documentation/changelog.rst
+++ b/documentation/changelog.rst
@@ -25,6 +25,13 @@ Infrastructure / Support
 .. warning:: The setting `FLEXMEASURES_PLUGIN_PATHS` has been deprecated since v0.7. It has now been sunset. Please replace it with :ref:`plugin-config`.
 
 
+v0.13.1 | May XX, 2023
+=======================
+Bugfixes
+---------
+* `@deprecated` not returning the output of the decorated function [see `PR #678 <https://www.github.com/FlexMeasures/flexmeasures/pull/678>`_]
+
+
 v0.13.0 | May 1, 2023
 ============================
 
diff --git a/flexmeasures/utils/coding_utils.py b/flexmeasures/utils/coding_utils.py
index e3264c671..7856c87d3 100644
--- a/flexmeasures/utils/coding_utils.py
+++ b/flexmeasures/utils/coding_utils.py
@@ -166,7 +166,7 @@ def wrapper(*args, **kwargs):
                 f"The method or function {func.__name__} is deprecated and it is expected to be sunset in version {version}. Please, switch to using {inspect.getmodule(alternative).__name__}:{alternative.__name__} to suppress this warning."
             )
 
-            func(*args, **kwargs)
+            return func(*args, **kwargs)
 
         return wrapper
 
diff --git a/flexmeasures/utils/tests/test_coding_utils.py b/flexmeasures/utils/tests/test_coding_utils.py
index 78706d16c..5e2c972bc 100644
--- a/flexmeasures/utils/tests/test_coding_utils.py
+++ b/flexmeasures/utils/tests/test_coding_utils.py
@@ -2,7 +2,7 @@
 
 
 def other_function():
-    pass
+    return 1
 
 
 def test_deprecated_decorator(caplog, app):
@@ -10,11 +10,11 @@ def test_deprecated_decorator(caplog, app):
     # defining a function that is deprecated
     @deprecated(other_function, "v14")
     def deprecated_function():
-        pass
+        return other_function()
 
     caplog.clear()
 
-    deprecated_function()  # calling a deprecated function
+    value = deprecated_function()  # calling a deprecated function
     print(caplog.records)
     assert len(caplog.records) == 1  # only 1 warning being printed
 
@@ -25,3 +25,7 @@ def deprecated_function():
     assert "v14" in str(
         caplog.records[0].message
     )  # checking that the message is correct
+
+    assert (
+        value == 1
+    )  # check that the decorator is returning the value of `other_function`