diff --git a/zaqar/common/decorators.py b/zaqar/common/decorators.py
index 96a200bda..689243dc2 100644
--- a/zaqar/common/decorators.py
+++ b/zaqar/common/decorators.py
@@ -203,7 +203,7 @@ def api_version_manager(version_info):
         @functools.wraps(fn)
         def register_api(driver, conf):
             if (deprecated and
-                    [api_version] not in conf.enable_deprecated_api_versions):
+                    api_version not in conf.enable_deprecated_api_versions):
                 return None
 
             if deprecated:
diff --git a/zaqar/conf/default.py b/zaqar/conf/default.py
index 15c31903f..f58b0d8c8 100644
--- a/zaqar/conf/default.py
+++ b/zaqar/conf/default.py
@@ -35,7 +35,7 @@ unreliable = cfg.BoolOpt(
 
 enable_deprecated_api_versions = cfg.ListOpt(
     'enable_deprecated_api_versions', default=[],
-    item_type=cfg.types.List(item_type=cfg.types.String(choices=('1', '1.1'))),
+    item_type=cfg.types.String(choices=('1', '1.1')),
     help='List of deprecated API versions to enable.')
 
 
diff --git a/zaqar/tests/unit/common/test_decorators.py b/zaqar/tests/unit/common/test_decorators.py
index 7cde89497..290cb170b 100644
--- a/zaqar/tests/unit/common/test_decorators.py
+++ b/zaqar/tests/unit/common/test_decorators.py
@@ -175,7 +175,7 @@ class TestDecorators(base.TestBase):
         public_endpoint_2(None, self.conf)
 
         # 3. Test enabling deprecated API version
-        self.config(enable_deprecated_api_versions=[['1']])
+        self.config(enable_deprecated_api_versions=['1'])
 
         @decorators.api_version_manager(VERSION)
         def public_endpoint_3(driver, conf):