diff --git a/build.gradle b/build.gradle
index 3a7bbcd..ed8cde6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ plugins {
 }
 
 group 'sh.okx'
-version '3.9'
+version '3.9.1'
 
 repositories {
     mavenCentral()
diff --git a/src/main/java/sh/okx/rankup/ranks/Rankup.java b/src/main/java/sh/okx/rankup/ranks/Rankup.java
index 129bfe3..30afebe 100644
--- a/src/main/java/sh/okx/rankup/ranks/Rankup.java
+++ b/src/main/java/sh/okx/rankup/ranks/Rankup.java
@@ -1,33 +1,35 @@
-package sh.okx.rankup.ranks;
-
-import org.bukkit.configuration.ConfigurationSection;
-import sh.okx.rankup.RankupPlugin;
-import sh.okx.rankup.ranks.requirements.RankRequirements;
-import sh.okx.rankup.ranks.requirements.RankRequirementsFactory;
-
-import java.util.List;
-
-public class Rankup extends Rank {
-  public static Rankup deserialize(RankupPlugin plugin, ConfigurationSection section) {
-    String next = section.getString("next");
-    String rank = section.getString("rank");
-
-    if (next != null && next.isEmpty()) {
-      plugin.getLogger().warning("Rankup section '" + section.getName() + "' has a blank 'next' field, will be ignored.");
-      return null;
-    }
-
-    return new Rankup(section,
-        plugin,
-        next,
-        rank,
-        RankRequirementsFactory.getRequirements(plugin, section),
-        section.getStringList("commands"));
-  }
-
-  protected Rankup(ConfigurationSection section, RankupPlugin plugin, String next, String rank,
-      RankRequirements requirements,
-      List<String> commands) {
-    super(section, plugin, next, rank, requirements, commands);
-  }
-}
+package sh.okx.rankup.ranks;
+
+import org.bukkit.configuration.ConfigurationSection;
+import sh.okx.rankup.RankupPlugin;
+import sh.okx.rankup.ranks.requirements.RankRequirements;
+import sh.okx.rankup.ranks.requirements.RankRequirementsFactory;
+
+import java.util.List;
+
+public class Rankup extends Rank {
+  public static Rankup deserialize(RankupPlugin plugin, ConfigurationSection section) {
+    String next = section.getString("next");
+    String rank = section.getString("rank");
+
+    if (next == null || next.isEmpty()) {
+      plugin.getLogger().warning("Having a final rank (for example: \"Z: rank: 'Z'\") from 3.4.2 or earlier should no longer be used.\n"
+          + "It is safe to just delete the final rank " + section.getName() + "");
+      plugin.getLogger().warning("Rankup section '" + section.getName() + "' has a blank 'next' field, will be ignored.");
+      return null;
+    }
+
+    return new Rankup(section,
+        plugin,
+        next,
+        rank,
+        RankRequirementsFactory.getRequirements(plugin, section),
+        section.getStringList("commands"));
+  }
+
+  protected Rankup(ConfigurationSection section, RankupPlugin plugin, String next, String rank,
+      RankRequirements requirements,
+      List<String> commands) {
+    super(section, plugin, next, rank, requirements, commands);
+  }
+}
diff --git a/src/main/java/sh/okx/rankup/requirements/ProgressiveRequirement.java b/src/main/java/sh/okx/rankup/requirements/ProgressiveRequirement.java
index fece93f..0a6fcec 100644
--- a/src/main/java/sh/okx/rankup/requirements/ProgressiveRequirement.java
+++ b/src/main/java/sh/okx/rankup/requirements/ProgressiveRequirement.java
@@ -1,34 +1,39 @@
-package sh.okx.rankup.requirements;
-
-import org.bukkit.entity.Player;
-import sh.okx.rankup.RankupPlugin;
-
-public abstract class ProgressiveRequirement extends Requirement {
-  public ProgressiveRequirement(RankupPlugin plugin, String name) {
-    super(plugin, name);
-  }
-
-  public ProgressiveRequirement(RankupPlugin plugin, String name, boolean subRequirement) {
-    super(plugin, name, subRequirement);
-  }
-
-  protected ProgressiveRequirement(Requirement clone) {
-    super(clone);
-  }
-
-  @Override
-  public boolean check(Player player) {
-    return getRemaining(player) <= 0;
-  }
-
-  @Override
-  public final double getRemaining(Player player) {
-    return getRemaining(player, 1);
-  }
-
-  public double getRemaining(Player player, double multiplier) {
-    return Math.max(0, (multiplier * getTotal(player)) - getProgress(player));
-  }
-
-  public abstract double getProgress(Player player);
-}
+package sh.okx.rankup.requirements;
+
+import org.bukkit.entity.Player;
+import sh.okx.rankup.RankupPlugin;
+
+public abstract class ProgressiveRequirement extends Requirement {
+  public ProgressiveRequirement(RankupPlugin plugin, String name) {
+    super(plugin, name);
+  }
+
+  public ProgressiveRequirement(RankupPlugin plugin, String name, boolean subRequirement) {
+    super(plugin, name, subRequirement);
+  }
+
+  protected ProgressiveRequirement(Requirement clone) {
+    super(clone);
+  }
+
+  @Override
+  public boolean check(Player player) {
+    return getRemaining(player) <= 0;
+  }
+
+  @Override
+  public final double getRemaining(Player player) {
+    return getRemaining(player, 1);
+  }
+
+  public double getRemaining(Player player, double multiplier) {
+    return Math.max(0, (multiplier * getTotal(player)) - getProgress(player));
+  }
+
+  @Override
+  public double getTotal(Player player) {
+    return getValueDouble();
+  }
+
+  public abstract double getProgress(Player player);
+}
diff --git a/src/main/java/sh/okx/rankup/requirements/Requirement.java b/src/main/java/sh/okx/rankup/requirements/Requirement.java
index 654ba4b..e16353f 100644
--- a/src/main/java/sh/okx/rankup/requirements/Requirement.java
+++ b/src/main/java/sh/okx/rankup/requirements/Requirement.java
@@ -1,104 +1,104 @@
-package sh.okx.rankup.requirements;
-
-import lombok.Getter;
-import org.bukkit.entity.Player;
-import sh.okx.rankup.RankupPlugin;
-
-public abstract class Requirement implements Cloneable {
-  protected final RankupPlugin plugin;
-  @Getter
-  protected final String name;
-  private String value;
-  @Getter
-  private String sub;
-  private boolean subRequirement;
-
-  public Requirement(RankupPlugin plugin, String name) {
-    this(plugin, name, false);
-  }
-
-  public Requirement(RankupPlugin plugin, String name, boolean subRequirement) {
-    this.plugin = plugin;
-    this.name = name;
-    this.subRequirement = subRequirement;
-  }
-
-  protected Requirement(Requirement clone) {
-    this.plugin = clone.plugin;
-    this.name = clone.name;
-    this.value = clone.value;
-    this.sub = clone.sub;
-    this.subRequirement = clone.subRequirement;
-  }
-
-  public void setValue(String value) {
-    if (hasSubRequirement()) {
-      String[] parts = value.split(" ", 2);
-      if (parts.length < 2) {
-        throw new IllegalArgumentException("Amount and sub-requirement not present for requirement '" + getName() + "'. You must use the format '" + getName() + " <sub-requirement> <amount>'");
-      }
-
-      this.sub = parts[0];
-      this.value = parts[1];
-    } else {
-      this.value = value;
-    }
-  }
-
-  public String getValueString() {
-    return value;
-  }
-
-  public String[] getValuesString() {
-    return value.split(" ");
-  }
-
-  public double getValueDouble() {
-    return Double.parseDouble(value);
-  }
-
-  public int getValueInt() {
-    return Integer.parseInt(value);
-  }
-
-  public boolean getValueBoolean() {
-    return Boolean.parseBoolean(value);
-  }
-
-  public String getFullName() {
-    if (hasSubRequirement()) {
-      return name + "#" + sub;
-    } else {
-      return name;
-    }
-  }
-
-  /**
-   * Check if a player meets this requirement
-   *
-   * @param player the player to check
-   * @return true if they meet the requirement, false otherwise
-   */
-  public abstract boolean check(Player player);
-
-  /**
-   * Get the remaining amount needed for <code>Requirement#check(Player)</code> to yield true.
-   * This is not required and is only used in placeholders.
-   *
-   * @param player the player to find the remaining amount of
-   * @return the remaining amount needed. Should be non-negative.
-   */
-  public double getRemaining(Player player) {
-    return check(player) ? 0 : 1;
-  }
-
-  public final boolean hasSubRequirement() {
-    return subRequirement;
-  }
-
-  public abstract Requirement clone();
-
-  public double getTotal(Player player) {
-    return getValueDouble();
-  }
-}
+package sh.okx.rankup.requirements;
+
+import lombok.Getter;
+import org.bukkit.entity.Player;
+import sh.okx.rankup.RankupPlugin;
+
+public abstract class Requirement implements Cloneable {
+  protected final RankupPlugin plugin;
+  @Getter
+  protected final String name;
+  private String value;
+  @Getter
+  private String sub;
+  private boolean subRequirement;
+
+  public Requirement(RankupPlugin plugin, String name) {
+    this(plugin, name, false);
+  }
+
+  public Requirement(RankupPlugin plugin, String name, boolean subRequirement) {
+    this.plugin = plugin;
+    this.name = name;
+    this.subRequirement = subRequirement;
+  }
+
+  protected Requirement(Requirement clone) {
+    this.plugin = clone.plugin;
+    this.name = clone.name;
+    this.value = clone.value;
+    this.sub = clone.sub;
+    this.subRequirement = clone.subRequirement;
+  }
+
+  public void setValue(String value) {
+    if (hasSubRequirement()) {
+      String[] parts = value.split(" ", 2);
+      if (parts.length < 2) {
+        throw new IllegalArgumentException("Amount and sub-requirement not present for requirement '" + getName() + "'. You must use the format '" + getName() + " <sub-requirement> <amount>'");
+      }
+
+      this.sub = parts[0];
+      this.value = parts[1];
+    } else {
+      this.value = value;
+    }
+  }
+
+  public String getValueString() {
+    return value;
+  }
+
+  public String[] getValuesString() {
+    return value.split(" ");
+  }
+
+  public double getValueDouble() {
+    return Double.parseDouble(value);
+  }
+
+  public int getValueInt() {
+    return Integer.parseInt(value);
+  }
+
+  public boolean getValueBoolean() {
+    return Boolean.parseBoolean(value);
+  }
+
+  public String getFullName() {
+    if (hasSubRequirement()) {
+      return name + "#" + sub;
+    } else {
+      return name;
+    }
+  }
+
+  /**
+   * Check if a player meets this requirement
+   *
+   * @param player the player to check
+   * @return true if they meet the requirement, false otherwise
+   */
+  public abstract boolean check(Player player);
+
+  /**
+   * Get the remaining amount needed for <code>Requirement#check(Player)</code> to yield true.
+   * This is not required and is only used in placeholders.
+   *
+   * @param player the player to find the remaining amount of
+   * @return the remaining amount needed. Should be non-negative.
+   */
+  public double getRemaining(Player player) {
+    return check(player) ? 0 : 1;
+  }
+
+  public final boolean hasSubRequirement() {
+    return subRequirement;
+  }
+
+  public abstract Requirement clone();
+
+  public double getTotal(Player player) {
+    return 1;
+  }
+}