diff --git a/main/pom.xml b/main/pom.xml
index 34f46e55f..a3da9f783 100644
--- a/main/pom.xml
+++ b/main/pom.xml
@@ -55,9 +55,9 @@
             <scope>provided</scope>
         </dependency>
         <dependency>
-            <groupId>net.sf.trove4j</groupId>
-            <artifactId>trove4j</artifactId>
-            <version>3.0.3</version>
+            <groupId>it.unimi.dsi</groupId>
+            <artifactId>fastutil</artifactId>
+            <version>8.5.14</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
@@ -202,8 +202,8 @@
                             </filters>
                             <relocations>
                                 <relocation>
-                                    <pattern>gnu.trove</pattern>
-                                    <shadedPattern>clib.trove</shadedPattern>
+                                    <pattern>it.unimi.dsi</pattern>
+                                    <shadedPattern>clib.fastutil</shadedPattern>
                                 </relocation>
                                 <relocation>
                                     <pattern>net.kyori</pattern>
diff --git a/main/src/main/java/net/citizensnpcs/Citizens.java b/main/src/main/java/net/citizensnpcs/Citizens.java
index 5917ea4f9..40e17b20a 100644
--- a/main/src/main/java/net/citizensnpcs/Citizens.java
+++ b/main/src/main/java/net/citizensnpcs/Citizens.java
@@ -291,8 +291,8 @@ public class Citizens extends JavaPlugin implements CitizensPlugin {
         // Unfortunately, transitive dependency management is not supported in this library.
         lib.loadLibrary(
                 Library.builder().groupId("ch{}ethz{}globis{}phtree").artifactId("phtree").version("2.8.0").build());
-        lib.loadLibrary(Library.builder().groupId("net{}sf{}trove4j").artifactId("trove4j").version("3.0.3")
-                .relocate("gnu{}trove", "clib{}trove").build());
+        lib.loadLibrary(Library.builder().groupId("it{}unimi{}dsi").artifactId("fastutil").version("8.5.14")
+                .relocate("it{}unimi{}dsi", "clib{}fastutil").build());
         lib.loadLibrary(Library.builder().groupId("net{}kyori").artifactId("adventure-text-minimessage")
                 .version("4.17.0").relocate("net{}kyori", "clib{}net{}kyori").build());
         lib.loadLibrary(Library.builder().groupId("net{}kyori").artifactId("adventure-api").version("4.17.0")
diff --git a/main/src/main/java/net/citizensnpcs/EventListen.java b/main/src/main/java/net/citizensnpcs/EventListen.java
index b63e9e76c..c9709680a 100644
--- a/main/src/main/java/net/citizensnpcs/EventListen.java
+++ b/main/src/main/java/net/citizensnpcs/EventListen.java
@@ -2,6 +2,7 @@ package net.citizensnpcs;
 
 import java.lang.reflect.Method;
 import java.util.List;
+import java.util.Objects;
 
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
@@ -65,7 +66,6 @@ import org.bukkit.scheduler.BukkitRunnable;
 import org.bukkit.util.Vector;
 
 import com.google.common.base.Joiner;
-import com.google.common.base.Predicates;
 import com.google.common.collect.ArrayListMultimap;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Iterables;
@@ -222,7 +222,7 @@ public class EventListen implements Listener {
     }
 
     private Iterable<NPC> getAllNPCs() {
-        return Iterables.filter(Iterables.concat(CitizensAPI.getNPCRegistries()), Predicates.notNull());
+        return Iterables.filter(Iterables.concat(CitizensAPI.getNPCRegistries()), Objects::nonNull);
     }
 
     void loadNPCs(ChunkEvent event) {
diff --git a/main/src/main/java/net/citizensnpcs/commands/NPCCommands.java b/main/src/main/java/net/citizensnpcs/commands/NPCCommands.java
index c4cd484c6..396646344 100644
--- a/main/src/main/java/net/citizensnpcs/commands/NPCCommands.java
+++ b/main/src/main/java/net/citizensnpcs/commands/NPCCommands.java
@@ -14,6 +14,7 @@ import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Locale;
+import java.util.Objects;
 import java.util.UUID;
 import java.util.stream.Collectors;
 
@@ -55,7 +56,6 @@ import org.json.simple.JSONObject;
 import org.json.simple.parser.JSONParser;
 
 import com.google.common.base.Joiner;
-import com.google.common.base.Predicates;
 import com.google.common.base.Splitter;
 import com.google.common.base.Strings;
 import com.google.common.collect.Iterables;
@@ -2811,7 +2811,7 @@ public class NPCCommands {
                 }
             }
             List<NPC> search = location.getWorld().getNearbyEntities(location, range, range, range).stream()
-                    .map(registry::getNPC).filter(Predicates.notNull()).collect(Collectors.toList());
+                    .map(registry::getNPC).filter(Objects::nonNull).collect(Collectors.toList());
             search.sort((o1, o2) -> Double.compare(o1.getEntity().getLocation().distanceSquared(location),
                     o2.getEntity().getLocation().distanceSquared(location)));
             for (NPC test : search) {
diff --git a/main/src/main/java/net/citizensnpcs/npc/CitizensNPCRegistry.java b/main/src/main/java/net/citizensnpcs/npc/CitizensNPCRegistry.java
index 50cc649c1..2d7ee494c 100644
--- a/main/src/main/java/net/citizensnpcs/npc/CitizensNPCRegistry.java
+++ b/main/src/main/java/net/citizensnpcs/npc/CitizensNPCRegistry.java
@@ -17,7 +17,7 @@ import org.bukkit.inventory.ItemStack;
 
 import com.google.common.collect.Maps;
 
-import gnu.trove.map.hash.TIntObjectHashMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
 import net.citizensnpcs.Settings.Setting;
 import net.citizensnpcs.api.CitizensAPI;
 import net.citizensnpcs.api.event.DespawnReason;
@@ -36,7 +36,7 @@ import net.citizensnpcs.util.NMS;
 
 public class CitizensNPCRegistry implements NPCRegistry {
     private final String name;
-    private final TIntObjectHashMap<NPC> npcs = new TIntObjectHashMap<>();
+    private final Int2ObjectOpenHashMap<NPC> npcs = new Int2ObjectOpenHashMap<>();
     private final NPCDataStore saves;
     private final Map<UUID, NPC> uniqueNPCs = Maps.newHashMap();
 
@@ -130,7 +130,7 @@ public class CitizensNPCRegistry implements NPCRegistry {
             try {
                 npc.despawn(reason);
             } catch (Throwable e) {
-                e.printStackTrace(); // ensure that all entities are despawned
+                e.printStackTrace();
             }
             itr.remove();
         }
@@ -200,7 +200,7 @@ public class CitizensNPCRegistry implements NPCRegistry {
     @Override
     public Iterator<NPC> iterator() {
         return new Iterator<NPC>() {
-            Iterator<NPC> itr = npcs.valueCollection().iterator();
+            Iterator<NPC> itr = npcs.values().iterator();
             UUID lastUUID;
 
             @Override
@@ -236,7 +236,7 @@ public class CitizensNPCRegistry implements NPCRegistry {
 
     @Override
     public Iterable<NPC> sorted() {
-        List<NPC> vals = new ArrayList<>(npcs.valueCollection());
+        List<NPC> vals = new ArrayList<>(npcs.values());
         vals.sort(Comparator.comparing(NPC::getId));
         return vals;
     }
diff --git a/main/src/main/java/net/citizensnpcs/npc/skin/SkinUpdateTracker.java b/main/src/main/java/net/citizensnpcs/npc/skin/SkinUpdateTracker.java
index 46ee39205..8e46ce6d8 100644
--- a/main/src/main/java/net/citizensnpcs/npc/skin/SkinUpdateTracker.java
+++ b/main/src/main/java/net/citizensnpcs/npc/skin/SkinUpdateTracker.java
@@ -21,7 +21,6 @@ import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.scheduler.BukkitRunnable;
 
-import com.google.common.base.Predicates;
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Sets;
 
@@ -91,7 +90,7 @@ public class SkinUpdateTracker {
     }
 
     private Iterable<NPC> getAllNPCs() {
-        return Iterables.filter(Iterables.concat(CitizensAPI.getNPCRegistries()), Predicates.notNull());
+        return Iterables.filter(Iterables.concat(CitizensAPI.getNPCRegistries()), Objects::nonNull);
     }
 
     private List<SkinnableEntity> getNearbyNPCs(Player player, boolean reset, boolean checkFov) {
diff --git a/main/src/main/java/net/citizensnpcs/trait/SkinTrait.java b/main/src/main/java/net/citizensnpcs/trait/SkinTrait.java
index d0488436a..7787d2efd 100644
--- a/main/src/main/java/net/citizensnpcs/trait/SkinTrait.java
+++ b/main/src/main/java/net/citizensnpcs/trait/SkinTrait.java
@@ -3,6 +3,7 @@ package net.citizensnpcs.trait;
 import java.util.Objects;
 
 import org.bukkit.ChatColor;
+import org.bukkit.entity.Player;
 
 import com.google.common.base.Charsets;
 import com.google.common.io.BaseEncoding;
@@ -16,6 +17,8 @@ import net.citizensnpcs.api.util.Messaging;
 import net.citizensnpcs.api.util.Placeholders;
 import net.citizensnpcs.npc.skin.Skin;
 import net.citizensnpcs.npc.skin.SkinnableEntity;
+import net.citizensnpcs.util.NMS;
+import net.citizensnpcs.util.SkinProperty;
 
 @TraitName("skintrait")
 public class SkinTrait extends Trait {
@@ -150,6 +153,17 @@ public class SkinTrait extends Trait {
         skinName = ChatColor.stripColor(name);
     }
 
+    /**
+     * Set skin data copying from a {@link Player}. Not subject to rate limiting from Mojang.
+     *
+     * @param player
+     *            The player to copy
+     */
+    public void setSkinPersistent(Player player) {
+        SkinProperty sp = SkinProperty.fromMojangProfile(NMS.getProfile(player));
+        setSkinPersistent(sp.name, sp.signature, sp.value);
+    }
+
     /**
      * Sets the skin data directly, respawning the NPC if spawned.
      *
diff --git a/main/src/main/java/net/citizensnpcs/trait/text/Text.java b/main/src/main/java/net/citizensnpcs/trait/text/Text.java
index ab2d01bb2..29b62bcac 100644
--- a/main/src/main/java/net/citizensnpcs/trait/text/Text.java
+++ b/main/src/main/java/net/citizensnpcs/trait/text/Text.java
@@ -1,5 +1,7 @@
 package net.citizensnpcs.trait.text;
 
+import java.time.Duration;
+import java.time.temporal.ChronoUnit;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -47,6 +49,8 @@ public class Text extends Trait implements Runnable, Listener {
     private double range = Setting.DEFAULT_TALK_CLOSE_RANGE.asDouble();
     @Persist(value = "realistic-looking")
     private boolean realisticLooker = Setting.DEFAULT_REALISTIC_LOOKING.asBoolean();
+    @Persist(value = "speech-bubble-duration")
+    private int speechBubbleDuration = Setting.DEFAULT_TEXT_SPEECH_BUBBLE_DURATION.asTicks();
     @Persist(value = "speech-bubbles")
     private boolean speechBubbles;
     @Persist(value = "talk-close")
@@ -205,11 +209,9 @@ public class Text extends Trait implements Runnable, Listener {
         }
         if (speechBubbles) {
             HologramTrait trait = npc.getOrAddTrait(HologramTrait.class);
-            trait.addTemporaryLine(Placeholders.replace(text.get(index), player, npc),
-                    Setting.DEFAULT_TEXT_SPEECH_BUBBLE_DURATION.asTicks());
-        } else {
-            npc.getDefaultSpeechController().speak(new SpeechContext(text.get(index), player));
+            trait.addTemporaryLine(Placeholders.replace(text.get(index), player, npc), speechBubbleDuration);
         }
+        npc.getDefaultSpeechController().speak(new SpeechContext(text.get(index), player));
         return true;
     }
 
@@ -242,6 +244,10 @@ public class Text extends Trait implements Runnable, Listener {
         this.range = range;
     }
 
+    public void setSpeechBubbleDuration(Duration duration) {
+        this.speechBubbleDuration = (int) (duration.get(ChronoUnit.MILLIS) / 50);
+    }
+
     /**
      * @return Whether talking close is enabled.
      */
diff --git a/main/src/main/java/net/citizensnpcs/trait/text/TextBasePrompt.java b/main/src/main/java/net/citizensnpcs/trait/text/TextBasePrompt.java
index c358faa00..9204a8df6 100644
--- a/main/src/main/java/net/citizensnpcs/trait/text/TextBasePrompt.java
+++ b/main/src/main/java/net/citizensnpcs/trait/text/TextBasePrompt.java
@@ -1,5 +1,6 @@
 package net.citizensnpcs.trait.text;
 
+import java.time.Duration;
 import java.util.Arrays;
 
 import org.bukkit.ChatColor;
@@ -13,6 +14,7 @@ import com.google.common.base.Joiner;
 
 import net.citizensnpcs.Settings.Setting;
 import net.citizensnpcs.api.util.Messaging;
+import net.citizensnpcs.api.util.SpigotUtil;
 import net.citizensnpcs.util.Messages;
 
 public class TextBasePrompt extends StringPrompt {
@@ -76,6 +78,15 @@ public class TextBasePrompt extends StringPrompt {
             text.toggleRealisticLooking();
         } else if (original.trim().equalsIgnoreCase("speech bubbles")) {
             text.toggleSpeechBubbles();
+        } else if (original.trim().startsWith("speech bubbles duration")) {
+            try {
+                Duration duration = SpigotUtil.parseDuration(original.replace("speech bubbles duration", "").trim(),
+                        null);
+                text.setSpeechBubbleDuration(duration);
+                Messaging.sendErrorTr(sender, Messages.SPEECH_BUBBLES_DURATION_SET, duration);
+            } catch (Exception exception) {
+                Messaging.sendErrorTr(sender, Messages.INVALID_SPEECH_BUBBLES_DURATION);
+            }
         } else if (input.equalsIgnoreCase("close") || original.trim().equalsIgnoreCase("talk close")) {
             text.toggleTalkClose();
         } else if (input.equalsIgnoreCase("range")) {
diff --git a/main/src/main/java/net/citizensnpcs/util/Messages.java b/main/src/main/java/net/citizensnpcs/util/Messages.java
index a44fa53be..25d0a4928 100644
--- a/main/src/main/java/net/citizensnpcs/util/Messages.java
+++ b/main/src/main/java/net/citizensnpcs/util/Messages.java
@@ -214,6 +214,7 @@ public class Messages {
     public static final String INVALID_SKIN_FILE = "citizens.commands.npc.skin.invalid-file";
     public static final String INVALID_SOUND = "citizens.commands.npc.sound.invalid-sound";
     public static final String INVALID_SPAWN_LOCATION = "citizens.commands.npc.create.invalid-location";
+    public static final String INVALID_SPEECH_BUBBLES_DURATION = "citizens.commands.npc.text.invalid-speech-bubbles-duration";
     public static final String INVALID_TRIGGER_TELEPORT_FORMAT = "citizens.editors.waypoints.triggers.teleport.invalid-format";
     public static final String INVALID_TROPICALFISH_COLOR = "citizens.commands.npc.tropicalfish.invalid-color";
     public static final String INVALID_TROPICALFISH_PATTERN = "citizens.commands.npc.tropicalfish.invalid-pattern";
@@ -399,6 +400,7 @@ public class Messages {
     public static final String SNOWMAN_FORM_SNOW_STOPPED = "citizens.commands.npc.snowman.form-snow-stopped";
     public static final String SOUND_INFO = "citizens.commands.npc.sound.info";
     public static final String SOUND_SET = "citizens.commands.npc.sound.set";
+    public static final String SPEECH_BUBBLES_DURATION_SET = "citizens.commands.npc.text.speech-bubbles-duration-set";
     public static final String SPEED_MODIFIER_SET = "citizens.commands.npc.speed.set";
     public static final String SPEED_TRIGGER_PROMPT = "citizens.editors.waypoints.triggers.speed.prompt";
     public static final String SPELL_SET = "citizens.commands.npc.spellcaster.spell-set";
diff --git a/main/src/main/resources/en.json b/main/src/main/resources/en.json
index 5cff1704d..72174844a 100644
--- a/main/src/main/resources/en.json
+++ b/main/src/main/resources/en.json
@@ -642,6 +642,8 @@
   "citizens.commands.template.conflict" : "A template by that name already exists.", 
   "citizens.commands.template.list.description" : "Lists available templates",
   "citizens.commands.template.list.header" : "]]Available templates:",
+  "citizens.commands.npc.text.invalid-speech-bubbles-duration" : "Invalid speech bubble duration.",
+  "citizens.commands.npc.text.speech-bubbles-duration-set" : "Speech bubble duration set to [[{0}]].",
   "citizens.commands.template.list.help" : "",
   "citizens.commands.template.missing" : "Template not found.",
   "citizens.commands.template.namespace-already-exists" : "Namespace [[{0}]] already exists",
@@ -707,7 +709,7 @@
   "citizens.editors.text.range-set" : "[[Range]] set to [[{0}]].",
   "citizens.editors.text.realistic-looking-set" : "[[Realistic looking]] set to [[{0}]].",
   "citizens.editors.text.speech-bubbles-set" : "[[Speech bubbles]] set to [[{0}]].",
-  "citizens.editors.text.start-prompt" : "<click:suggest_command:add ><yellow><u>Add text</u></click> | <click:suggest_command:item ><hover:show_text:\"Set the talk item in hand pattern (set to <yellow>default</yellow> to clear)\"><yellow><u>item</hover></click> | <click:suggest_command:range ><hover:show_text:Set the talking range in blocks><yellow><u>range</hover></click> | <click:suggest_command:delay ><hover:show_text:Set the talking delay in ticks><yellow><u>delay</u></yellow></hover></click><br><click:run_command:/npc text close><hover:show_text:Toggle sending messages when players get close>{0}<u>talk close</hover></click> | <click:run_command:/npc text random><hover:show_text:Toggle random talking>{1}<u>random</hover></click> | <click:run_command:/npc text speech bubbles><hover:show_text:Toggle showing text as holograms instead of chat messages>{2}<u>speech bubbles</hover></click> | <click:run_command:/npc text realistic looking><hover:show_text:Toggle requiring line of sight before speaking>{3}<u>realistic</hover></click>",
+  "citizens.editors.text.start-prompt" : "<click:suggest_command:add ><yellow><u>Add text</u></click> | <click:suggest_command:item ><hover:show_text:\"Set the talk item in hand pattern (set to <yellow>default</yellow> to clear)\"><yellow><u>item</hover></click> | <click:suggest_command:range ><hover:show_text:Set the talking range in blocks><yellow><u>range</hover></click> | <click:suggest_command:delay ><hover:show_text:Set the talking delay in ticks><yellow><u>delay</u></yellow></hover></click><br><click:run_command:/npc text close><hover:show_text:Toggle sending messages when players get close>{0}<u>talk close</hover></click> | <click:run_command:/npc text random><hover:show_text:Toggle random talking>{1}<u>random</hover></click> | <click:suggest_command:/npc text speech bubbles duration ><hover:show_text:Set speech bubble duration>{2}<u>speech bubble duration</hover></click> | <click:run_command:/npc text speech bubbles><hover:show_text:Toggle showing text as holograms instead of chat messages>{2}<u>speech bubbles</hover></click> | <click:run_command:/npc text realistic looking><hover:show_text:Toggle requiring line of sight before speaking>{3}<u>realistic</hover></click>",
   "citizens.editors.text.talk-item-set" : "[[Talk item pattern]] set to [[{0}]].",
   "citizens.editors.text.text-list-header" : "Current text:",
   "citizens.editors.waypoints.guided.added-available" : "Added a [[destination]] waypoint which the NPC will randomly pathfind between.",