diff --git a/README.rst b/README.rst
index 05aeadc..a342660 100644
--- a/README.rst
+++ b/README.rst
@@ -135,7 +135,7 @@ The `reducer` parameter supports ``'tuple'``, ``'path'``, ``'underscore'``, ``'d
 
 There is also a factory function `make_reducer()` to help you create customized reducer. The function currently only supports customized delimiter:
 
->>> from flatten_dict.reducer import make_reducer
+>>> from flatten_dict.reducers import make_reducer
 >>> pprint(flatten(normal_dict, reducer=make_reducer(delimiter='_')))
 {'a': '0',
  'b_a': '1.0',
@@ -258,7 +258,7 @@ The `splitter` parameter supports ``'tuple'``, ``'path'``, ``'underscore'``, ``'
 
 There is also a factory function `make_splitter()` to help you create customized splitter. The function currently only supports customized delimiter:
 
->>> from flatten_dict.splitter import make_splitter
+>>> from flatten_dict.splitters import make_splitter
 >>> pprint(unflatten(flat_dict, splitter=make_splitter(delimiter='_')))
 {'a': '0',
  'b': {'a': '1.0', 'b': '1.1'},
diff --git a/src/flatten_dict/flatten_dict.py b/src/flatten_dict/flatten_dict.py
index f3a2003..7f55088 100644
--- a/src/flatten_dict/flatten_dict.py
+++ b/src/flatten_dict/flatten_dict.py
@@ -5,8 +5,8 @@
 
 import six
 
-from .reducer import tuple_reducer, path_reducer, dot_reducer, underscore_reducer
-from .splitter import tuple_splitter, path_splitter, dot_splitter, underscore_splitter
+from .reducers import tuple_reducer, path_reducer, dot_reducer, underscore_reducer
+from .splitters import tuple_splitter, path_splitter, dot_splitter, underscore_splitter
 
 
 REDUCER_DICT = {
diff --git a/src/flatten_dict/reducer.py b/src/flatten_dict/reducer.py
index 1bcd068..5df5c14 100644
--- a/src/flatten_dict/reducer.py
+++ b/src/flatten_dict/reducer.py
@@ -1,51 +1,9 @@
-def tuple_reducer(k1, k2):
-    if k1 is None:
-        return (k2,)
-    else:
-        return k1 + (k2,)
+"""`flatten_dict.reducer` is deprecated in favor of `flatten_dict.reducers`."""
+import warnings
 
+from .reducers import *  # noqa: F401, F403
 
-def path_reducer(k1, k2):
-    import os.path
-
-    if k1 is None:
-        return k2
-    else:
-        return os.path.join(k1, k2)
-
-
-def dot_reducer(k1, k2):
-    if k1 is None:
-        return k2
-    else:
-        return "{}.{}".format(k1, k2)
-
-
-def underscore_reducer(k1, k2):
-    if k1 is None:
-        return k2
-    else:
-        return "{}_{}".format(k1, k2)
-
-
-def make_reducer(delimiter):
-    """Create a reducer with a custom delimiter.
-
-    Parameters
-    ----------
-    delimiter : str
-        Delimiter to use to join keys.
-
-    Returns
-    -------
-    f : Callable
-        Callable that can be passed to `flatten()`'s `reducer` argument.
-    """
-
-    def f(k1, k2):
-        if k1 is None:
-            return k2
-        else:
-            return "{}{}{}".format(k1, delimiter, k2)
-
-    return f
+warnings.warn(
+    "`flatten_dict.reducer` is deprecated in favor of `flatten_dict.reducers`.",
+    FutureWarning,
+)
diff --git a/src/flatten_dict/reducers.py b/src/flatten_dict/reducers.py
new file mode 100644
index 0000000..1bcd068
--- /dev/null
+++ b/src/flatten_dict/reducers.py
@@ -0,0 +1,51 @@
+def tuple_reducer(k1, k2):
+    if k1 is None:
+        return (k2,)
+    else:
+        return k1 + (k2,)
+
+
+def path_reducer(k1, k2):
+    import os.path
+
+    if k1 is None:
+        return k2
+    else:
+        return os.path.join(k1, k2)
+
+
+def dot_reducer(k1, k2):
+    if k1 is None:
+        return k2
+    else:
+        return "{}.{}".format(k1, k2)
+
+
+def underscore_reducer(k1, k2):
+    if k1 is None:
+        return k2
+    else:
+        return "{}_{}".format(k1, k2)
+
+
+def make_reducer(delimiter):
+    """Create a reducer with a custom delimiter.
+
+    Parameters
+    ----------
+    delimiter : str
+        Delimiter to use to join keys.
+
+    Returns
+    -------
+    f : Callable
+        Callable that can be passed to `flatten()`'s `reducer` argument.
+    """
+
+    def f(k1, k2):
+        if k1 is None:
+            return k2
+        else:
+            return "{}{}{}".format(k1, delimiter, k2)
+
+    return f
diff --git a/src/flatten_dict/splitter.py b/src/flatten_dict/splitter.py
index 94a81b4..0eb43cc 100644
--- a/src/flatten_dict/splitter.py
+++ b/src/flatten_dict/splitter.py
@@ -1,42 +1,9 @@
-def tuple_splitter(flat_key):
-    return flat_key
+"""`flatten_dict.splitter` is deprecated in favor of `flatten_dict.splitters`."""
+import warnings
 
+from .splitters import *  # noqa: F401, F403
 
-def path_splitter(flat_key):
-    try:
-        from pathlib import PurePath
-    except ImportError:
-        from pathlib2 import PurePath
-    keys = PurePath(flat_key).parts
-    return keys
-
-
-def dot_splitter(flat_key):
-    keys = tuple(flat_key.split("."))
-    return keys
-
-
-def underscore_splitter(flat_key):
-    keys = tuple(flat_key.split("_"))
-    return keys
-
-
-def make_splitter(delimiter):
-    """Create a reducer with a custom delimiter.
-
-    Parameters
-    ----------
-    delimiter : str
-        Delimiter to use to split keys.
-
-    Returns
-    -------
-    f : Callable
-        Callable that can be passed to ``unflatten``'s ``splitter`` argument.
-    """
-
-    def f(flat_key):
-        keys = tuple(flat_key.split(delimiter))
-        return keys
-
-    return f
+warnings.warn(
+    "`flatten_dict.splitter` is deprecated in favor of `flatten_dict.splitters`.",
+    FutureWarning,
+)
diff --git a/src/flatten_dict/splitters.py b/src/flatten_dict/splitters.py
new file mode 100644
index 0000000..94a81b4
--- /dev/null
+++ b/src/flatten_dict/splitters.py
@@ -0,0 +1,42 @@
+def tuple_splitter(flat_key):
+    return flat_key
+
+
+def path_splitter(flat_key):
+    try:
+        from pathlib import PurePath
+    except ImportError:
+        from pathlib2 import PurePath
+    keys = PurePath(flat_key).parts
+    return keys
+
+
+def dot_splitter(flat_key):
+    keys = tuple(flat_key.split("."))
+    return keys
+
+
+def underscore_splitter(flat_key):
+    keys = tuple(flat_key.split("_"))
+    return keys
+
+
+def make_splitter(delimiter):
+    """Create a reducer with a custom delimiter.
+
+    Parameters
+    ----------
+    delimiter : str
+        Delimiter to use to split keys.
+
+    Returns
+    -------
+    f : Callable
+        Callable that can be passed to ``unflatten``'s ``splitter`` argument.
+    """
+
+    def f(flat_key):
+        keys = tuple(flat_key.split(delimiter))
+        return keys
+
+    return f
diff --git a/src/flatten_dict/tests/flatten_dict_test.py b/src/flatten_dict/tests/flatten_dict_test.py
index 2bdd33d..d2fd454 100644
--- a/src/flatten_dict/tests/flatten_dict_test.py
+++ b/src/flatten_dict/tests/flatten_dict_test.py
@@ -7,13 +7,13 @@
 import pytest
 
 from flatten_dict import flatten, unflatten
-from flatten_dict.reducer import (
+from flatten_dict.reducers import (
     tuple_reducer,
     path_reducer,
     underscore_reducer,
     make_reducer,
 )
-from flatten_dict.splitter import (
+from flatten_dict.splitters import (
     tuple_splitter,
     path_splitter,
     underscore_splitter,