diff --git a/gitimg/attack_dialog.png b/gitimg/attack_dialog.png
index 14a2a82..ac667e8 100644
Binary files a/gitimg/attack_dialog.png and b/gitimg/attack_dialog.png differ
diff --git a/gitimg/brute_force_attack.png b/gitimg/brute_force_attack.png
index 6c2c2b6..bc9cd09 100644
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diff --git a/gitimg/editor_flask.png b/gitimg/editor_flask.png
index e32817f..ff80b69 100644
Binary files a/gitimg/editor_flask.png and b/gitimg/editor_flask.png differ
diff --git a/gitimg/key_dialog.png b/gitimg/key_dialog.png
index 337e4ed..2be66d9 100644
Binary files a/gitimg/key_dialog.png and b/gitimg/key_dialog.png differ
diff --git a/gitimg/settings_view.png b/gitimg/settings_view.png
index 8562548..4a1b85d 100644
Binary files a/gitimg/settings_view.png and b/gitimg/settings_view.png differ
diff --git a/gitimg/unknown_tab.png b/gitimg/unknown_tab.png
index bfcf0e1..0b8060d 100644
Binary files a/gitimg/unknown_tab.png and b/gitimg/unknown_tab.png differ
diff --git a/gitimg/wordlist_view.png b/gitimg/wordlist_view.png
index 01936d8..4090ecc 100644
Binary files a/gitimg/wordlist_view.png and b/gitimg/wordlist_view.png differ
diff --git a/src/main/java/one/d4d/sessionless/itsdangerous/crypto/TokenSigner.java b/src/main/java/one/d4d/sessionless/itsdangerous/crypto/TokenSigner.java
index 50514dd..451fdc9 100644
--- a/src/main/java/one/d4d/sessionless/itsdangerous/crypto/TokenSigner.java
+++ b/src/main/java/one/d4d/sessionless/itsdangerous/crypto/TokenSigner.java
@@ -21,7 +21,8 @@ public class TokenSigner implements Cloneable {
     public Derivation keyDerivation = Derivation.HMAC;
     public MessageDerivation messageDerivation = MessageDerivation.NONE;
     public MessageDigestAlgorithm messageDigestAlgorithm = MessageDigestAlgorithm.SHA1;
-    public Set<Derivation> knownDerivations = EnumSet.allOf(Derivation.class);
+    public Set<Derivation> knownDerivations = EnumSet.of(Derivation.HASH,
+            Derivation.DJANGO, Derivation.CONCAT, Derivation.HMAC, Derivation.NONE);
     public byte[] secret_key;
     public byte[] salt = "itsdangerous.Signer".getBytes();
     public byte[] sep;
diff --git a/src/main/java/one/d4d/sessionless/utils/Utils.java b/src/main/java/one/d4d/sessionless/utils/Utils.java
index 1e33906..8634050 100644
--- a/src/main/java/one/d4d/sessionless/utils/Utils.java
+++ b/src/main/java/one/d4d/sessionless/utils/Utils.java
@@ -1,5 +1,6 @@
 package one.d4d.sessionless.utils;
 
+import burp.api.montoya.http.message.MimeType;
 import com.google.common.primitives.Ints;
 import com.google.gson.Gson;
 import com.google.gson.JsonParser;
@@ -26,6 +27,7 @@
 import java.util.zip.Inflater;
 
 public class Utils {
+    public static final Set<MimeType> SUPPORTED_MIMETYPES = Set.of(MimeType.HTML, MimeType.PLAIN_TEXT, MimeType.JSON, MimeType.XML, MimeType.YAML);
     public static final int BRUTE_FORCE_CHUNK_SIZE = 4096;
     public static final int WORDLIST_ONE_CHAR = 256;
     public static final int WORDLIST_TWO_CHAR = 65536;