diff --git a/helpers.lua b/helpers.lua
index 59fd3ea..8883624 100644
--- a/helpers.lua
+++ b/helpers.lua
@@ -145,10 +145,10 @@ function set_auth_cookie(user, domain)
                "|"..session_key)
     local cookie_str = "; Domain=."..domain..
                        "; Path=/"..
-                       "; Expires="..os.date("%a, %d %b %Y %X UTC;", expire)..
+                       "; Expires="..os.date("%a, %d %b %Y %X UTC", expire)..
                        "; Secure"..
                        "; HttpOnly"..
-                       "; SameSite=Strict"
+                       "; SameSite=Strict ;;"
 
     ngx.header["Set-Cookie"] = {
         "SSOwAuthUser="..user..cookie_str,
@@ -162,14 +162,14 @@ end
 function delete_cookie()
     conf = config.get_config()
 
-    local expired_time = "Thu, 01 Jan 1970 00:00:00 UTC;"
+    local expired_time = "Thu, 01 Jan 1970 00:00:00 UTC"
     for _, domain in ipairs(conf["domains"]) do
         local cookie_str = "; Domain=."..domain..
                            "; Path=/"..
                            "; Expires="..expired_time..
                            "; Secure"..
                            "; HttpOnly"..
-                           "; SameSite=Strict"
+                           "; SameSite=Strict ;;"
         ngx.header["Set-Cookie"] = {
             "SSOwAuthUser="..cookie_str,
             "SSOwAuthHash="..cookie_str,
@@ -181,12 +181,12 @@ end
 
 -- Expires the redirection cookie
 function delete_redirect_cookie()
-    local expired_time = "Thu, 01 Jan 1970 00:00:00 UTC;"
+    local expired_time = "Thu, 01 Jan 1970 00:00:00 UTC"
     local cookie_str = "; Path="..conf["portal_path"]..
                        "; Expires="..expired_time..
                        "; Secure"..
                        "; HttpOnly"..
-                       "; SameSite=Strict"
+                       "; SameSite=Strict ;;"
     ngx.header["Set-Cookie"] = "SSOwAuthRedirect=;" ..cookie_str
 end