diff --git a/dev-requirements.txt b/dev-requirements.txt
index 88b8a4f46..d16a976c0 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -284,7 +284,7 @@ tzdata==2025.1
     #   icalendar
     #   recurring-ical-events
     #   x-wr-timezone
-tzlocal==5.2
+tzlocal==5.3
     # via caldav
 uritemplate==4.1.1
     # via
diff --git a/ldap-requirements.txt b/ldap-requirements.txt
index 1d8090d39..4d792dcb5 100644
--- a/ldap-requirements.txt
+++ b/ldap-requirements.txt
@@ -235,7 +235,7 @@ tzdata==2025.1
     #   icalendar
     #   recurring-ical-events
     #   x-wr-timezone
-tzlocal==5.2
+tzlocal==5.3
     # via caldav
 uritemplate==4.1.1
     # via
diff --git a/mysql-requirements.txt b/mysql-requirements.txt
index 312c28710..51d664b68 100644
--- a/mysql-requirements.txt
+++ b/mysql-requirements.txt
@@ -226,7 +226,7 @@ tzdata==2025.1
     #   icalendar
     #   recurring-ical-events
     #   x-wr-timezone
-tzlocal==5.2
+tzlocal==5.3
     # via caldav
 uritemplate==4.1.1
     # via
diff --git a/postgresql-requirements.txt b/postgresql-requirements.txt
index 15b9fd6a2..c79ccfbf8 100644
--- a/postgresql-requirements.txt
+++ b/postgresql-requirements.txt
@@ -229,7 +229,7 @@ tzdata==2025.1
     #   icalendar
     #   recurring-ical-events
     #   x-wr-timezone
-tzlocal==5.2
+tzlocal==5.3
     # via caldav
 uritemplate==4.1.1
     # via
diff --git a/requirements.txt b/requirements.txt
index bf0610e68..32064d960 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -224,7 +224,7 @@ tzdata==2025.1
     #   icalendar
     #   recurring-ical-events
     #   x-wr-timezone
-tzlocal==5.2
+tzlocal==5.3
     # via caldav
 uritemplate==4.1.1
     # via
diff --git a/test-requirements.txt b/test-requirements.txt
index d7b10626a..d8ab7b156 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -267,7 +267,7 @@ tzdata==2025.1
     #   icalendar
     #   recurring-ical-events
     #   x-wr-timezone
-tzlocal==5.2
+tzlocal==5.3
     # via caldav
 uritemplate==4.1.1
     # via