diff --git a/reviewboard/extensions/base.py b/reviewboard/extensions/base.py
index df9568001f759540faa1c4c09c59560ce72feb48..8216e6295aecaf3f2b0d508d01e783b2cbd47c4d 100644
--- a/reviewboard/extensions/base.py
+++ b/reviewboard/extensions/base.py
@@ -1,3 +1,5 @@
+from __future__ import unicode_literals
+
 from djblets.extensions.extension import Extension
 from djblets.extensions.manager import ExtensionManager
 
diff --git a/reviewboard/extensions/hooks.py b/reviewboard/extensions/hooks.py
index 3caf3aabad4d5b53be726c240847be835f1e3a40..50f72d909aa7698599385cb926b92ead7171ef64 100644
--- a/reviewboard/extensions/hooks.py
+++ b/reviewboard/extensions/hooks.py
@@ -1,3 +1,5 @@
+from __future__ import unicode_literals
+
 from djblets.extensions.hooks import (ExtensionHook, ExtensionHookPoint,
                                       TemplateHook, URLHook)
 from djblets.util.compat import six
diff --git a/reviewboard/extensions/packaging.py b/reviewboard/extensions/packaging.py
index c8c5d8d8b3372a6f66501ac68a2cbe0d99e2837e..2a50b594a4eb8bc053da0ca0c506b003c3cd3a05 100644
--- a/reviewboard/extensions/packaging.py
+++ b/reviewboard/extensions/packaging.py
@@ -1,3 +1,5 @@
+from __future__ import unicode_literals
+
 from djblets.extensions.packaging import (
     BuildStaticFiles as DjbletsBuildStaticFiles,
     build_extension_cmdclass)
diff --git a/reviewboard/extensions/templatetags/rb_extensions.py b/reviewboard/extensions/templatetags/rb_extensions.py
index d3d0077ae085ce347a4164663f53759f962f410b..d6be2239bddc439df817375801efff581d3522a6 100644
--- a/reviewboard/extensions/templatetags/rb_extensions.py
+++ b/reviewboard/extensions/templatetags/rb_extensions.py
@@ -1,3 +1,5 @@
+from __future__ import unicode_literals
+
 from django import template
 from django.template.loader import render_to_string
 from djblets.util.decorators import basictag
diff --git a/reviewboard/extensions/tests.py b/reviewboard/extensions/tests.py
index 3711bef90331d563913de8fd2a788740fbbfe04a..cabe6b6b76114128d12216eea2cb9ee7d83313c9 100644
--- a/reviewboard/extensions/tests.py
+++ b/reviewboard/extensions/tests.py
@@ -1,3 +1,5 @@
+from __future__ import unicode_literals
+
 from django.template import Context, Template
 from django.test import TestCase
 from djblets.extensions.manager import ExtensionManager
diff --git a/reviewboard/extensions/views.py b/reviewboard/extensions/views.py
index 9ab66a6f982829d9cdb9b5234df5eedd01843bea..73585b06d4c290d23cd36bcff051fda979bd3f75 100644
--- a/reviewboard/extensions/views.py
+++ b/reviewboard/extensions/views.py
@@ -1,3 +1,5 @@
+from __future__ import unicode_literals
+
 import djblets.extensions.views as djblets_ext_views
 
 from reviewboard.extensions.base import get_extension_manager