diff --git a/radicale-auth-ldap/__init__.py b/radicale-auth-ldap/__init__.py
index d361529..7fbebbc 100644
--- a/radicale-auth-ldap/__init__.py
+++ b/radicale-auth-ldap/__init__.py
@@ -84,8 +84,16 @@ class UserCache:
         hashedUserName = hashlib.sha256((userName + self.salt).encode()).hexdigest()
         hashedPassword = hashlib.sha256((password + self.salt).encode()).hexdigest()
 
+        ## Check if user is in cache
         if hashedUserName in self.cache:
-            return self.cache[hashedUserName].checkSecret(hashedPassword)
+            ## Check if user password is correct
+            if self.cache[hashedUserName].checkSecret(hashedPassword):
+                return True
+            else
+                ## Delete cache entry if password is wrong
+                self.cache.pop(hashedUserName)
+
+                return False
         else:
             return False