diff --git a/OpenStackGPUServer.py b/OpenStackGPUServer.py
index 64de2f8..b6c02f7 100644
--- a/OpenStackGPUServer.py
+++ b/OpenStackGPUServer.py
@@ -63,8 +63,12 @@ def update_cache():
                         help="Combination of host:port where a memcached server listened.",
                         type=str,
                         default="127.0.0.1:11211")
+    PARSER.add_argument("--memcachedPrefix",
+                        help="Prefix for memcached keys",
+                        type=str,
+                        default='')
     PARSER.add_argument("--bind",
-                        help="Update cache only, implies option --memcached and forces updating the cache.",
+                        help="Bind address for REST API server.",
                         type=str,
                         default="127.0.0.1:8080")
     PARSER.add_argument("--workers",
@@ -80,6 +84,7 @@ def update_cache():
 
     # validate arguments
     MEMCACHEDHOST = ARGS.memcachedHost.split(":")
+    MEMCACHEDPREFIX= ARGS.memcachedPrefix
     BIND = ARGS.bind.split(":")
     WORKERS = ARGS.workers
     TIMEOUT = ARGS.timeout
@@ -87,7 +92,8 @@ def update_cache():
     # configure memcached
     openapi_server.controllers.configure_memcache(enabled=True,
                                                   host=MEMCACHEDHOST,
-                                                  expire=300)
+                                                  expire=TIMEOUT,
+                                                  prefix=MEMCACHEDPREFIX)
 
     # run gunicorn in a separate child process
     if os.fork() == 0:
diff --git a/openapi_server/controllers/__init__.py b/openapi_server/controllers/__init__.py
index 2f0e8c6..49c407d 100644
--- a/openapi_server/controllers/__init__.py
+++ b/openapi_server/controllers/__init__.py
@@ -35,19 +35,21 @@ def enable_memcache(enabled=True):
     MEMCACHE = enabled
 
 
-def configure_memcache(enabled=True, host="127.0.0.1:11211", expire=300):
+def configure_memcache(enabled=True, host="127.0.0.1:11211", expire=300, prefix=""):
     """
     Configure memcache.
     :param enabled: Enabled memcached support, defaults to True
     :param host: memcached host as string "<ip>:<port>", defaults to "127.0.0.1:11211"
     :param expire : time in seconds after cache expires, default to 300
+    :param prefix : optional memcached key prefix, default to ""
     :return: None
     """
-    global MEMCACHE, MEMCACHEDHOST, MEMCACHEDCLIENT, MEMCACHEEXPIREAFTER # pylint: disable=W0603
+    global MEMCACHE, MEMCACHEDHOST, MEMCACHEDCLIENT, MEMCACHEEXPIREAFTER, MEMCACHEDPREFIX # pylint: disable=W0603
     MEMCACHE = enabled
     MEMCACHEDHOST = host
     MEMCACHEEXPIREAFTER = expire
     MEMCACHEDCLIENT = MemCachedClient(MEMCACHEDHOST, serde=SerDe())
+    MEMCACHEDPREFIX = prefix
 
 
 def get_flavors():
@@ -63,16 +65,16 @@ def get_flavors():
     timestamp = datetime.now()
     if MEMCACHE:
         # check if memcached contains a list of flavors
-        flavors = MEMCACHEDCLIENT.get('FlavorGPU')
-        if MEMCACHEDCLIENT.get('FlavorGPU.timestamp'):
-            timestamp = datetime.strptime(MEMCACHEDCLIENT.get('FlavorGPU.timestamp'), '%Y-%m-%d %H:%M:%S')
+        flavors = MEMCACHEDCLIENT.get(MEMCACHEDPREFIX+'FlavorGPU')
+        if MEMCACHEDCLIENT.get(MEMCACHEDPREFIX+'FlavorGPU.timestamp'):
+            timestamp = datetime.strptime(MEMCACHEDCLIENT.get(MEMCACHEDPREFIX+'FlavorGPU.timestamp'), '%Y-%m-%d %H:%M:%S')
 
     if not flavors:
         flavors = __get_flavors_as_json_()
         if MEMCACHE:
             # update memcached
-            MEMCACHEDCLIENT.set("FlavorGPU", flavors, MEMCACHEEXPIREAFTER)
-            MEMCACHEDCLIENT.set("FlavorGPU.timestamp", timestamp.strftime('%Y-%m-%d %H:%M:%S'), MEMCACHEEXPIREAFTER)
+            MEMCACHEDCLIENT.set(MEMCACHEDPREFIX+"FlavorGPU", flavors, MEMCACHEEXPIREAFTER)
+            MEMCACHEDCLIENT.set(MEMCACHEDPREFIX+"FlavorGPU.timestamp", timestamp.strftime('%Y-%m-%d %H:%M:%S'), MEMCACHEEXPIREAFTER)
 
     return {"flavors": flavors, "timestamp": timestamp.strftime('%Y-%m-%d %H:%M:%S')}
 
@@ -97,5 +99,5 @@ def update_cache():
     Updates the cached data stored in the configured MemCached service.
     :return: None
     """
-    MEMCACHEDCLIENT.set("FlavorGPU", __get_flavors_as_json_(), MEMCACHEEXPIREAFTER)
-    MEMCACHEDCLIENT.set("FlavorGPU.timestamp", datetime.now().strftime('%Y-%m-%d %H:%M:%S'), MEMCACHEEXPIREAFTER)
+    MEMCACHEDCLIENT.set(MEMCACHEDPREFIX+"FlavorGPU", __get_flavors_as_json_(), MEMCACHEEXPIREAFTER)
+    MEMCACHEDCLIENT.set(MEMCACHEDPREFIX+"FlavorGPU.timestamp", datetime.now().strftime('%Y-%m-%d %H:%M:%S'), MEMCACHEEXPIREAFTER)
diff --git a/requirements.txt b/requirements.txt
index b45e284..f3794bf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-connexion[swagger-ui] >= 2.6.0; python_version>="3.6"
+connexion[swagger-ui] == 2.14.2
 swagger-ui-bundle >= 0.0.2
 python_dateutil >= 2.6.0
 setuptools >= 21.0.0