diff --git a/CHANGELOG.md b/CHANGELOG.md
index 06ad824..d56108e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## v2.3.2 (2025-12-24)
+
+### Fix
+
+- **eventmanager**: prevent skipping listeners during event emission
+
 ## v2.3.1 (2025-12-23)
 
 ### Fix
diff --git a/cz.toml b/cz.toml
new file mode 100644
index 0000000..e1d8a7b
--- /dev/null
+++ b/cz.toml
@@ -0,0 +1,6 @@
+[tool.commitizen]
+name = "cz_conventional_commits"
+tag_format = "$version"
+version_scheme = "pep440"
+version_provider = "uv"
+update_changelog_on_bump = true
diff --git a/pyproject.toml b/pyproject.toml
index cb118cf..f991574 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "funcnodes-core"
 
-version = "2.3.1"
+version = "2.3.2"
 
 description = "core package for funcnodes"
 authors = [{name = "Julian Kimmig", email = "julian.kimmig@linkdlab.de"}]
diff --git a/src/funcnodes_core/eventmanager.py b/src/funcnodes_core/eventmanager.py
index 11880ff..e459c3d 100644
--- a/src/funcnodes_core/eventmanager.py
+++ b/src/funcnodes_core/eventmanager.py
@@ -337,11 +337,11 @@ def emit(self, event_name: str, msg: MessageInArgs | None = None) -> bool:
         msg["src"] = self
         listened = False
         if event_name in self._events:
-            for callback in self._events[event_name]:
+            for callback in self._events[event_name][:]:
                 callback(**msg)
                 listened = True
         if "*" in self._events:
-            for callback in self._events["*"]:
+            for callback in self._events["*"][:]:
                 callback(event=event_name, **msg)
                 listened = True
 
diff --git a/tests/test_eventmanager.py b/tests/test_eventmanager.py
index 7fba0a5..931d07e 100644
--- a/tests/test_eventmanager.py
+++ b/tests/test_eventmanager.py
@@ -597,3 +597,52 @@ async def async_test_function(self):
         {"src": emitter, "result": "async_function_result"},
     )
     assert result == "async_function_result"
+
+
+class EmitterTest(EventEmitterMixin):
+    pass
+
+
+@pytest.mark.asyncio
+async def test_event_manager_modification_during_emit():
+    """
+    Test that modifying the event listener list (e.g., via once()) during
+    event emission does not cause listeners to be skipped.
+    """
+    emitter = EmitterTest()
+    called = []
+
+    def cb1(**kwargs):
+        called.append(1)
+
+    def cb2(**kwargs):
+        called.append(2)
+
+    def cb3(**kwargs):
+        called.append(3)
+
+    # Scenario: cb1 is 'once', cb2 is normal.
+    # When event fires:
+    # 1. cb1 is called. It calls 'off' which removes itself from the list.
+    # 2. cb2 should still be called.
+
+    emitter.once("test", cb1)
+    emitter.on("test", cb2)
+    emitter.emit("test")
+
+    assert 1 in called
+    assert 2 in called
+
+    called.clear()
+    emitter.off("test")
+
+    # Scenario: cb1 is normal, cb2 is once, cb3 is normal.
+    emitter.on("test", cb1)
+    emitter.once("test", cb2)
+    emitter.on("test", cb3)
+
+    emitter.emit("test")
+
+    assert 1 in called
+    assert 2 in called
+    assert 3 in called
diff --git a/uv.lock b/uv.lock
index 7997790..1014ded 100644
--- a/uv.lock
+++ b/uv.lock
@@ -457,7 +457,7 @@ wheels = [
 
 [[package]]
 name = "funcnodes-core"
-version = "2.3.1"
+version = "2.3.2"
 source = { editable = "." }
 dependencies = [
     { name = "dill" },