diff --git a/generate_pluginmaster.py b/generate_pluginmaster.py
index e49ab17..9e2966f 100644
--- a/generate_pluginmaster.py
+++ b/generate_pluginmaster.py
@@ -1,6 +1,7 @@
 import yaml
 import json
 import os
+from datetime import datetime
 from time import time
 from sys import argv
 from os.path import getmtime
@@ -51,8 +52,8 @@ def main():
     # write the master
     write_master(info, master)
 
-    # update the LastUpdated field in master
-    last_updated(info)
+    # update the LastUpdate field in master
+    last_update(info)
 
 def extract_manifests(info):
     manifests = []
@@ -90,16 +91,25 @@ def write_master(info, master):
 def trim_manifest(plugin):
     return {k: plugin[k] for k in TRIMMED_KEYS if k in plugin}
 
-def last_updated(info):
+def last_update(info):
     with open(info['master_name']) as f:
         master = json.load(f)
 
     for plugin in master:
         latest = f'{info["plugins_dir"]}/{plugin["InternalName"]}/latest.zip'
-        modified = int(getmtime(latest))
 
-        if 'LastUpdated' not in plugin or modified != int(plugin['LastUpdated']):
-            plugin['LastUpdated'] = str(modified)
+        modified = 0
+        with ZipFile(latest) as z:
+            for zip_info in z.infolist():
+                info_mod = datetime(*zip_info.date_time).timestamp()
+                if info_mod > modified:
+                    modified = int(info_mod)
+
+        if info_mod == datetime(1970, 1, 1):
+            modified = int(getmtime(latest))
+
+        if 'LastUpdate' not in plugin or modified != int(plugin['LastUpdate']):
+            plugin['LastUpdate'] = str(modified)
 
     with open(info['master_name'], 'w') as f:
         json.dump(master, f, indent=4)
diff --git a/pluginmaster.json b/pluginmaster.json
index 8d341c6..cdb67a8 100644
--- a/pluginmaster.json
+++ b/pluginmaster.json
@@ -14,7 +14,7 @@
         "IsTestingExclusive": false,
         "DownloadLinkTesting": "https://git.sr.ht/~jkcclemens/plugin_repo/blob/main/plugins/ChatTwo/latest.zip",
         "DownloadLinkUpdate": "https://git.sr.ht/~jkcclemens/plugin_repo/blob/main/plugins/ChatTwo/latest.zip",
-        "LastUpdated": "1643750754"
+        "LastUpdate": "1643750752"
     },
     {
         "Author": "ascclemens",
@@ -30,6 +30,6 @@
         "IsTestingExclusive": false,
         "DownloadLinkTesting": "https://git.sr.ht/~jkcclemens/plugin_repo/blob/main/plugins/NominaOcculta/latest.zip",
         "DownloadLinkUpdate": "https://git.sr.ht/~jkcclemens/plugin_repo/blob/main/plugins/NominaOcculta/latest.zip",
-        "LastUpdated": "1642020965"
+        "LastUpdate": "1642038964"
     }
 ]
\ No newline at end of file
diff --git a/unofficial.json b/unofficial.json
index 7faf3aa..ad2f546 100644
--- a/unofficial.json
+++ b/unofficial.json
@@ -12,7 +12,7 @@
         "IsTestingExclusive": false,
         "DownloadLinkTesting": "https://git.sr.ht/~jkcclemens/plugin_repo/blob/main/unofficial/DalamudPython/latest.zip",
         "DownloadLinkUpdate": "https://git.sr.ht/~jkcclemens/plugin_repo/blob/main/unofficial/DalamudPython/latest.zip",
-        "LastUpdated": "1641412908"
+        "LastUpdate": "1641412906"
     },
     {
         "Author": "ascclemens",
@@ -28,7 +28,7 @@
         "IsTestingExclusive": false,
         "DownloadLinkTesting": "https://git.sr.ht/~jkcclemens/plugin_repo/blob/main/unofficial/Macrology/latest.zip",
         "DownloadLinkUpdate": "https://git.sr.ht/~jkcclemens/plugin_repo/blob/main/unofficial/Macrology/latest.zip",
-        "LastUpdated": "1641412754"
+        "LastUpdate": "1641412754"
     },
     {
         "Author": "ascclemens",
@@ -44,6 +44,6 @@
         "IsTestingExclusive": false,
         "DownloadLinkTesting": "https://git.sr.ht/~jkcclemens/plugin_repo/blob/main/unofficial/RoleplayersToolbox/latest.zip",
         "DownloadLinkUpdate": "https://git.sr.ht/~jkcclemens/plugin_repo/blob/main/unofficial/RoleplayersToolbox/latest.zip",
-        "LastUpdated": "1641412669"
+        "LastUpdate": "1641412668"
     }
 ]
\ No newline at end of file