diff --git a/docs/main/changelog.rst b/docs/main/changelog.rst
index 0b5e9807..e254a743 100644
--- a/docs/main/changelog.rst
+++ b/docs/main/changelog.rst
@@ -10,6 +10,7 @@ follows `Semantic versioning`_
 Development version
 -------------------
 - Add ``dependency_injector.injections`` module (C extension).
+- Transfer ``dependency_injector.errors`` module to Cython (C extension).
 - Remove ``@inject`` decorator.
 - Add makefile (``clean``, ``test``, ``build``, ``install``, ``uninstall`` 
   & ``publish`` commands).
diff --git a/setup.py b/setup.py
index f6ddec9c..c91dd47e 100644
--- a/setup.py
+++ b/setup.py
@@ -50,6 +50,10 @@ setup(name='dependency-injector',
                     ['src/dependency_injector/injections.c'],
                     define_macros=defined_macros,
                     extra_compile_args=['-O2']),
+          Extension('dependency_injector.errors',
+                    ['src/dependency_injector/errors.c'],
+                    define_macros=defined_macros,
+                    extra_compile_args=['-O2']),
       ],
       package_data={
           'dependency_injector': ['*.pxd'],
diff --git a/src/dependency_injector/errors.pxd b/src/dependency_injector/errors.pxd
new file mode 100644
index 00000000..8a274eef
--- /dev/null
+++ b/src/dependency_injector/errors.pxd
@@ -0,0 +1,8 @@
+"""Dependency injector errors.
+
+Powered by Cython.
+"""
+
+
+cdef class Error(Exception):
+    pass
diff --git a/src/dependency_injector/errors.py b/src/dependency_injector/errors.pyx
similarity index 51%
rename from src/dependency_injector/errors.py
rename to src/dependency_injector/errors.pyx
index 69aa283e..f37c28dc 100644
--- a/src/dependency_injector/errors.py
+++ b/src/dependency_injector/errors.pyx
@@ -1,7 +1,10 @@
-"""Dependency injector errors module."""
+"""Dependency injector errors.
+
+Powered by Cython.
+"""
 
 
-class Error(Exception):
+cdef class Error(Exception):
     """Base error.
 
     All dependency injector errors extend this error class.
diff --git a/src/dependency_injector/injections.pxd b/src/dependency_injector/injections.pxd
index d6969714..38682403 100644
--- a/src/dependency_injector/injections.pxd
+++ b/src/dependency_injector/injections.pxd
@@ -1,6 +1,6 @@
 """Dependency injector injections.
 
-Cython optimized code.
+Powered by Cython.
 """
 
 cimport cython
diff --git a/src/dependency_injector/injections.pyx b/src/dependency_injector/injections.pyx
index 1afd99c7..673360a1 100644
--- a/src/dependency_injector/injections.pyx
+++ b/src/dependency_injector/injections.pyx
@@ -1,6 +1,6 @@
 """Dependency injector injections.
 
-Cython optimized code.
+Powered by Cython.
 """
 
 cimport cython