diff --git a/ospurge/resources/base.py b/ospurge/resources/base.py
index 12ad801..b47c473 100644
--- a/ospurge/resources/base.py
+++ b/ospurge/resources/base.py
@@ -11,7 +11,6 @@
 #  under the License.
 import abc
 import collections
-import inspect
 import logging
 import threading
 import time
@@ -21,6 +20,11 @@ from typing import Iterable
 from typing import Optional
 from typing import TYPE_CHECKING
 
+try:
+    import funcsigs as inspect   # Python 2.7
+except ImportError:
+    import inspect
+
 from ospurge import exceptions
 
 if TYPE_CHECKING:  # pragma: no cover
diff --git a/requirements.txt b/requirements.txt
index 8d130a1..ce9948f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,6 @@ os-client-config>=1.22.0  # Apache-2.0
 pbr>=1.8 # Apache-2.0
 shade>=1.13.1
 typing>=3.5.2.2  # PSF
+
+# Python 2.7 dependencies
+funcsigs; python_version < '3.0'