diff --git a/lib/gson-2.8.5.jar b/lib/gson-2.8.5.jar
deleted file mode 100644
index 0d5baf3..0000000
Binary files a/lib/gson-2.8.5.jar and /dev/null differ
diff --git a/lib/gson-2.9.0.jar b/lib/gson-2.9.0.jar
new file mode 100644
index 0000000..fb62e05
Binary files /dev/null and b/lib/gson-2.9.0.jar differ
diff --git a/src/pattypan/Main.java b/src/pattypan/Main.java
index 4724a19..f4e6fb9 100644
--- a/src/pattypan/Main.java
+++ b/src/pattypan/Main.java
@@ -85,6 +85,8 @@ public static void main(String[] args) {
     );
 
     Session.WIKI = Wiki.newSession(wiki, scriptPath, protocol);
+    Session.WIKI.setUserAgent(Settings.USERAGENT);
+    Session.LOGGER.log(Level.INFO, "User-Agent: {0}", Session.WIKI.getUserAgent());
     launch(args);
   }
 }
diff --git a/src/pattypan/Session.java b/src/pattypan/Session.java
index 073d65e..77f6535 100644
--- a/src/pattypan/Session.java
+++ b/src/pattypan/Session.java
@@ -46,15 +46,12 @@ public final class Session {
 
   public static Logger LOGGER = new LogManager().logger;
 
+  public static Wiki WIKI;
+
   public static String METHOD = "template";
   public static String TEMPLATE = "Artwork";
   public static String WIKICODE = "";
   public static ArrayList<String> VARIABLES = new ArrayList<>(Arrays.asList("path", "name"));
 
-  public static Wiki WIKI = Wiki.newSession("commons.wikimedia.org");
   public static ArrayList<UploadElement> FILES_TO_UPLOAD = new ArrayList<>();
-
-  static {
-    WIKI.setUserAgent(Settings.USERAGENT);
-  }
 }
diff --git a/src/pattypan/Settings.java b/src/pattypan/Settings.java
index 78a3713..c8b7aae 100644
--- a/src/pattypan/Settings.java
+++ b/src/pattypan/Settings.java
@@ -42,7 +42,7 @@ public final class Settings {
   private Settings() {};
 
   public static final String NAME = "pattypan";
-  public static final String VERSION = "22.02";
+  public static final String VERSION = "22.03";
   public static final String USERAGENT = NAME + "/" + VERSION + " (https://github.com/yarl/pattypan)";
 
   public static final Map<String, String> SETTINGS = new HashMap<>();
diff --git a/src/pattypan/Util.java b/src/pattypan/Util.java
index b31ba58..e793e3f 100644
--- a/src/pattypan/Util.java
+++ b/src/pattypan/Util.java
@@ -23,19 +23,17 @@
  */
 package pattypan;
 
-import edu.stanford.ejalbert.BrowserLauncher;
-import edu.stanford.ejalbert.exception.BrowserLaunchingInitializingException;
-import edu.stanford.ejalbert.exception.UnsupportedOperatingSystemException;
 import java.awt.Desktop;
 import java.awt.EventQueue;
-import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
-import java.io.InputStreamReader;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse.BodyHandlers;
 import java.nio.file.DirectoryStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -50,6 +48,10 @@
 import java.util.Set;
 import java.util.logging.Level;
 import java.util.stream.Collectors;
+
+import edu.stanford.ejalbert.BrowserLauncher;
+import edu.stanford.ejalbert.exception.BrowserLaunchingInitializingException;
+import edu.stanford.ejalbert.exception.UnsupportedOperatingSystemException;
 import javafx.geometry.HPos;
 import javafx.scene.layout.ColumnConstraints;
 
@@ -148,14 +150,24 @@ public static ColumnConstraints newColumn(int value, String unit, HPos position)
             "SANY", "SAM")
   );
 
-  public static boolean stringHasValidFileExtension(String string) {
+  // https://www.mediawiki.org/wiki/Manual:Page_title
+  private final static ArrayList<String> invalidFilenameCharacters = new ArrayList<>(
+    Arrays.asList("#", "<", ">", "[", "]", "|", "{", "}")
+  );
+
+
+  public static boolean hasValidFileExtension(String string) {
     return allowedFileExtension.parallelStream().anyMatch(string::endsWith);
   }
 
-  public static boolean isPossibleBadFilename(String name) {
+  public static boolean hasPossibleBadFilenamePrefix(String name) {
     return filenamePrefixBlacklist.parallelStream().anyMatch(name::startsWith);
   }
 
+  public static boolean hasInvalidFilenameCharacters(String name) {
+    return invalidFilenameCharacters.parallelStream().anyMatch(name::contains);
+  }
+
   public static String getNameFromFilename(String filename) {
     int pos = filename.lastIndexOf(".");
     if (pos > 0) {
@@ -192,9 +204,10 @@ public static File[] getFilesAllowedToUpload(File directory, boolean includeSubd
   }
 
   public static File[] getFilesAllowedToUpload(File directory, String ext) {
-    return directory.listFiles((File dir, String name)
-            -> name.toLowerCase().endsWith(ext)
-    );
+    File[] files = directory.listFiles((File dir, String name) -> name.toLowerCase().endsWith(ext));
+    Arrays.sort(files);
+    return files;
+
   }
 
   public static Map<String, Integer> getFilesByExtention(File[] files) {
@@ -254,22 +267,18 @@ public static String getFileChecksum(MessageDigest digest, File file) throws IOE
 }
 
   public static String readUrl(String urlString) throws Exception {
-    BufferedReader reader = null;
     try {
-      URL url = new URL(urlString);
-      reader = new BufferedReader(new InputStreamReader(url.openStream()));
-      StringBuilder buffer = new StringBuilder();
-      int read;
-      char[] chars = new char[1024];
-      while ((read = reader.read(chars)) != -1) {
-        buffer.append(chars, 0, read);
-      }
+      HttpClient client = HttpClient.newHttpClient();
 
-      return buffer.toString();
-    } finally {
-      if (reader != null) {
-        reader.close();
-      }
+      HttpRequest request = HttpRequest.newBuilder(
+            URI.create(urlString))
+        .header("user-agent", Settings.USERAGENT)
+        .build();
+
+      var response = client.send(request, BodyHandlers.ofString());
+      return response.body();
+    } catch (Exception e) {
+      throw new Exception("Error while getting JSON from " + urlString);
     }
   }
 
diff --git a/src/pattypan/panes/ChooseColumnsPane.java b/src/pattypan/panes/ChooseColumnsPane.java
index 5d9ae4b..c39c974 100644
--- a/src/pattypan/panes/ChooseColumnsPane.java
+++ b/src/pattypan/panes/ChooseColumnsPane.java
@@ -195,7 +195,7 @@ private boolean showTemplateFields(String templateName) {
     Hyperlink docLink = new Hyperlink(Util.text("choose-columns-template-doc"));
     docLink.setMinHeight(25);
     docLink.setOnAction(event -> {
-      Util.openUrl("https://commons.wikimedia.org/wiki/Template:" + template.name + "/doc");
+      Util.openUrl("https://commons.wikimedia.org/wiki/Template:" + template.name.replace(" ", "_") + "/doc");
     });
 
     templateDescContainer.getChildren().clear();
diff --git a/src/pattypan/panes/LoadPane.java b/src/pattypan/panes/LoadPane.java
index d4c3241..cbf9b70 100644
--- a/src/pattypan/panes/LoadPane.java
+++ b/src/pattypan/panes/LoadPane.java
@@ -163,7 +163,7 @@ private void addFilesToUpload(ArrayList<Map<String, String>> descriptions, Templ
           }
 
           // when uploaded from URL the extension is not automatically added
-          if (!Util.stringHasValidFileExtension(description.get("name"))) {
+          if (!Util.hasValidFileExtension(description.get("name"))) {
             throw new Exception("filename does not include a valid file extension");
           }
         } else {
@@ -172,8 +172,12 @@ private void addFilesToUpload(ArrayList<Map<String, String>> descriptions, Templ
           }
         }
 
-        if (Util.isPossibleBadFilename(description.get("name"))) {
-          warnings.add(description.get("name") + ": filename shouldn't have name from camera (DSC, DSCF, etc");
+        if (Util.hasPossibleBadFilenamePrefix(description.get("name"))) {
+          warnings.add(description.get("name") + ": filename shouldn't have name from camera (DSC, DSCF, etc)");
+        }
+
+        if (Util.hasInvalidFilenameCharacters(description.get("name"))) {
+          throw new Exception(description.get("name") + ": filename shouldn't contain invalid characters (#, ], {, etc)");
         }
 
         Set<String> keys = Util.getKeysByValue(description, "");
diff --git a/src/pattypan/panes/StartPane.java b/src/pattypan/panes/StartPane.java
index 579ba4c..dbd84aa 100644
--- a/src/pattypan/panes/StartPane.java
+++ b/src/pattypan/panes/StartPane.java
@@ -23,16 +23,18 @@
  */
 package pattypan.panes;
 
-import com.google.gson.JsonArray;
-import com.google.gson.JsonElement;
-import com.google.gson.JsonObject;
-import com.google.gson.JsonParser;
 import java.net.UnknownHostException;
 import java.nio.file.Paths;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.logging.Level;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+
 import javafx.geometry.Pos;
 import javafx.scene.control.Hyperlink;
 import javafx.scene.layout.GridPane;
@@ -158,7 +160,7 @@ public ArrayList<String> getVersions() throws Exception {
     ArrayList<String> versions = new ArrayList<>();
     String json = Util.readUrl("https://api.github.com/repos/yarl/pattypan/releases");
 
-    JsonArray releases = new JsonParser().parse(json).getAsJsonArray();
+    JsonArray releases = JsonParser.parseString(json).getAsJsonArray();
     for (JsonElement element : releases) {
       JsonObject release = element.getAsJsonObject();
       boolean draft = release.get("draft").getAsBoolean();