diff --git a/cache.py b/cache.py
index 182f14b1..44311d80 100644
--- a/cache.py
+++ b/cache.py
@@ -65,6 +65,14 @@ def expirePersonCache(personCache: {}):
             del personCache[personUrl]
         print(str(len(removals))+' actors were expired from the cache')
 
+def expireCache(baseDir: str,personCache: {}):
+    """Cache expiry thread
+    """
+    while True:
+        # once per day
+        time.sleep(60*60*24)
+        expirePersonCache(basedir,personCache)
+
 def storeWebfingerInCache(handle: str,wf,cachedWebfingers: {}) -> None:
     """Store a webfinger endpoint in the cache
     """
diff --git a/daemon.py b/daemon.py
index 05c0f9d0..fc6a8193 100644
--- a/daemon.py
+++ b/daemon.py
@@ -109,6 +109,7 @@ from announce import createAnnounce
 from announce import outboxAnnounce
 from content import addHtmlTags
 from media import removeMetaData
+from cache import expireCache
 import os
 import sys
 
@@ -2940,6 +2941,12 @@ def runDaemon(projectVersion, \
         print('Creating actors cache')
         os.mkdir(baseDir+'/cache/actors')
 
+    print('Creating cache expiry thread')
+    httpd.thrCache= \
+        threadWithTrace(target=expireCache, \
+                        args=(baseDir,httpd.personCache),daemon=True)
+    httpd.thrCache.start()
+
     print('Creating inbox queue')
     httpd.thrInboxQueue= \
         threadWithTrace(target=runInboxQueue, \
diff --git a/inbox.py b/inbox.py
index e6c9d47e..cb5fb9f9 100644
--- a/inbox.py
+++ b/inbox.py
@@ -1037,7 +1037,7 @@ def restoreQueueItems(baseDir: str,queue: []) -> None:
                         queue.append(os.path.join(queueDir, qfile))
     if len(queue)>0:
         print('Restored '+str(len(queue))+' inbox queue items')
-
+        
 def runInboxQueue(projectVersion: str, \
                   baseDir: str,httpPrefix: str,sendThreads: [],postLog: [], \
                   cachedWebfingers: {},personCache: {},queue: [], \