diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9263f50d..cce047e0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@
 * Add: option [storage] use_cache_subfolder_for_synctoken for storing 'sync-token' cache outside collection-root
 * Add: option [storage] folder_umask for configuration of umask (overwrite system-default)
 * Fix: also remove 'item' from cache on delete
+* Improve: avoid automatically invalid cache on upgrade in case no change on cache structure
+* Improve: log important module versions on startup
 
 ## 3.3.1
 
diff --git a/radicale/server.py b/radicale/server.py
index 80e58fd3..77080117 100644
--- a/radicale/server.py
+++ b/radicale/server.py
@@ -2,7 +2,7 @@
 # Copyright © 2008 Nicolas Kandel
 # Copyright © 2008 Pascal Halter
 # Copyright © 2008-2017 Guillaume Ayoub
-# Copyright © 2017-2019 Unrud <unrud@outlook.com>
+# Copyright © 2017-2023 Unrud <unrud@outlook.com>
 # Copyright © 2024-2024 Peter Bieringer <pb@bieringer.de>
 #
 # This library is free software: you can redistribute it and/or modify
@@ -301,7 +301,7 @@ def serve(configuration: config.Configuration,
 
     """
 
-    logger.info("Starting Radicale")
+    logger.info("Starting Radicale (%s)", utils.packages_version())
     # Copy configuration before modifying
     configuration = configuration.copy()
     configuration.update({"server": {"_internal_server": "True"}}, "server",
diff --git a/radicale/storage/__init__.py b/radicale/storage/__init__.py
index 58f2a499..da89bcf3 100644
--- a/radicale/storage/__init__.py
+++ b/radicale/storage/__init__.py
@@ -2,6 +2,7 @@
 # Copyright © 2014 Jean-Marc Martins
 # Copyright © 2012-2017 Guillaume Ayoub
 # Copyright © 2017-2022 Unrud <unrud@outlook.com>
+# Copyright © 2024-2024 Peter Bieringer <pb@bieringer.de>
 #
 # This library is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -35,17 +36,19 @@
 from radicale import item as radicale_item
 from radicale import types, utils
 from radicale.item import filter as radicale_filter
+from radicale.log import logger
 
 INTERNAL_TYPES: Sequence[str] = ("multifilesystem", "multifilesystem_nolock",)
 
-CACHE_DEPS: Sequence[str] = ("radicale", "vobject")
-CACHE_VERSION: bytes = "".join(
-    "%s=%s;" % (pkg, utils.package_version(pkg))
-    for pkg in CACHE_DEPS).encode()
+# NOTE: change only if cache structure is modified to avoid cache invalidation on update
+CACHE_VERSION_RADICALE = "3.3.1"
+
+CACHE_VERSION: bytes = ("%s=%s;%s=%s;" % ("radicale", CACHE_VERSION_RADICALE, "vobject", utils.package_version("vobject"))).encode()
 
 
 def load(configuration: "config.Configuration") -> "BaseStorage":
     """Load the storage module chosen in configuration."""
+    logger.debug("storage cache version: %r", str(CACHE_VERSION))
     return utils.load_plugin(INTERNAL_TYPES, "storage", "Storage", BaseStorage,
                              configuration)
 
diff --git a/radicale/utils.py b/radicale/utils.py
index 50a8d822..097be3fb 100644
--- a/radicale/utils.py
+++ b/radicale/utils.py
@@ -26,6 +26,8 @@
 
 _T_co = TypeVar("_T_co", covariant=True)
 
+RADICALE_MODULES: Sequence[str] = ("radicale", "vobject", "passlib", "defusedxml")
+
 
 def load_plugin(internal_types: Sequence[str], module_name: str,
                 class_name: str, base_class: Type[_T_co],
@@ -51,6 +53,13 @@ def package_version(name):
     return metadata.version(name)
 
 
+def packages_version():
+    versions = []
+    for pkg in RADICALE_MODULES:
+        versions.append("%s=%s" % (pkg, package_version(pkg)))
+    return " ".join(versions)
+
+
 def ssl_context_options_by_protocol(protocol: str, ssl_context_options):
     logger.debug("SSL protocol string: '%s' and current SSL context options: '0x%x'", protocol, ssl_context_options)
     # disable any protocol by default