diff --git a/CHANGELOG.md b/CHANGELOG.md
index f423bdc..db4192a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -72,11 +72,16 @@ variable.
   by combining multiple applications behind the same jetforce server. See
   examples/vhost.py for an example of how to use this class.
 
-### v0.2.2 (2012-03-31)
+### v0.2.3 (2020-05-24)
+
+- Fix a security vulnerability that allowed maliciously crafted URLs to break
+  out of the root server directory.
+
+### v0.2.2 (2020-03-31)
 
 - Fix a regression in path matching for the static directory application.
   
-### v0.2.1 (2012-03-31)
+### v0.2.1 (2020-03-31)
 
 - A hostname can now be specified in the route pattern, to facilitate running
   multiple vhosts on a single jetforce server.
@@ -87,7 +92,7 @@ variable.
 - Added the following CGI variables for client certificates:
   TLS_CLIENT_NOT_BEFORE, TLS_CLIENT_NOT_AFTER, TLS_CLIENT_SERIAL_NUMBER
 
-### v0.2.0 (2012-01-21)
+### v0.2.0 (2020-01-21)
 
 #### Features
 
diff --git a/jetforce/app/static.py b/jetforce/app/static.py
index 713db6e..59a1f27 100644
--- a/jetforce/app/static.py
+++ b/jetforce/app/static.py
@@ -48,7 +48,7 @@ class StaticDirectoryApplication(JetforceApplication):
         url_path = pathlib.Path(request.path.strip("/"))
 
         filename = pathlib.Path(os.path.normpath(str(url_path)))
-        if filename.is_absolute() or str(filename.name).startswith(".."):
+        if filename.is_absolute() or str(filename).startswith(".."):
             # Guard against breaking out of the directory
             return Response(Status.NOT_FOUND, "Not Found")