diff --git a/selfdrive/common/params.cc b/selfdrive/common/params.cc
index b261855b4e..c7ef3c0fcb 100644
--- a/selfdrive/common/params.cc
+++ b/selfdrive/common/params.cc
@@ -153,8 +153,9 @@ std::unordered_map<std::string, uint32_t> keys = {
     {"GsmRoaming", PERSISTENT},
     {"HardwareSerial", PERSISTENT},
     {"HasAcceptedTerms", PERSISTENT},
-    {"IsDriverViewEnabled", CLEAR_ON_MANAGER_START},
     {"IMEI", PERSISTENT},
+    {"InstallDate", PERSISTENT},
+    {"IsDriverViewEnabled", CLEAR_ON_MANAGER_START},
     {"IsLdwEnabled", PERSISTENT},
     {"IsMetric", PERSISTENT},
     {"IsOffroad", CLEAR_ON_MANAGER_START},
diff --git a/selfdrive/updated.py b/selfdrive/updated.py
index f3fb5d8d8f..3865d1228b 100755
--- a/selfdrive/updated.py
+++ b/selfdrive/updated.py
@@ -346,6 +346,12 @@ def main():
   if EON and os.geteuid() != 0:
     raise RuntimeError("updated must be launched as root!")
 
+  ov_lock_fd = open(LOCK_FILE, 'w')
+  try:
+    fcntl.flock(ov_lock_fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
+  except IOError as e:
+    raise RuntimeError("couldn't get overlay lock; is another updated running?") from e
+
   # Set low io priority
   proc = psutil.Process()
   if psutil.LINUX:
@@ -355,11 +361,9 @@ def main():
   if Path(os.path.join(STAGING_ROOT, "old_openpilot")).is_dir():
     cloudlog.event("update installed")
 
-  ov_lock_fd = open(LOCK_FILE, 'w')
-  try:
-    fcntl.flock(ov_lock_fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
-  except IOError as e:
-    raise RuntimeError("couldn't get overlay lock; is another updated running?") from e
+  if not params.get("InstallDate"):
+    t = datetime.datetime.utcnow().isoformat()
+    params.put("InstallDate", t.encode('utf8'))
 
   # Wait for IsOffroad to be set before our first update attempt
   wait_helper = WaitTimeHelper(proc)