diff --git a/src/events/guildMemberUpdate.ts b/src/events/guildMemberUpdate.ts
index 9939da6..7fb9933 100644
--- a/src/events/guildMemberUpdate.ts
+++ b/src/events/guildMemberUpdate.ts
@@ -1,11 +1,30 @@
 import { EmbedBuilder, Events, GuildMember, TextChannel } from "discord.js";
 import { Config } from "../libs/loadVariables.js";
 import { registerBoost, removeBoost } from "../services/boosterService.js";
-import { assignBoosterRole, removeBoosterRole, assignLevelRoles, removeAllLevelRoles, deleteCustomRole } from "../services/roleService.js";
+import {
+  assignBoosterRole,
+  removeBoosterRole,
+  assignLevelRoles,
+  removeAllLevelRoles,
+  deleteCustomRole,
+} from "../services/roleService.js";
+import { logger } from "../libs/logger.js";
 
 export default {
   name: Events.GuildMemberUpdate,
-  async execute(oldMember: GuildMember, newMember: GuildMember, config: Config) {
+  async execute(
+    oldMember: GuildMember,
+    newMember: GuildMember,
+    config: Config,
+  ) {
+    try {
+      if (oldMember.partial) oldMember = await oldMember.fetch();
+      if (newMember.partial) newMember = await newMember.fetch();
+    } catch (error) {
+      logger.error(
+        `Failed to fetch partials for user ${oldMember.user.username}`,
+      );
+    }
     const wasBoostingBefore = oldMember.premiumSince !== null;
     const isBoostingNow = newMember.premiumSince !== null;
 
@@ -14,17 +33,20 @@ export default {
     } else if (wasBoostingBefore && !isBoostingNow) {
       await onBoostEnd(newMember, config);
     }
-  }
+  },
 };
 
-async function onBoostStart(member: GuildMember, config: Config): Promise<void> {
+async function onBoostStart(
+  member: GuildMember,
+  config: Config,
+): Promise<void> {
   const guild = member.guild;
 
   const record = await registerBoost(
     member.id,
     guild.id,
     guild.name,
-    guild.iconURL()
+    guild.iconURL(),
   );
 
   if (!record) return;
@@ -32,29 +54,45 @@ async function onBoostStart(member: GuildMember, config: Config): Promise<void>
   await assignBoosterRole(member, config);
   await assignLevelRoles(member, record.boostCounts ?? 1);
 
-  const greetChannel = guild.channels.cache.get(config.greetChannelId) as TextChannel | undefined;
+  const greetChannel = guild.channels.cache.get(config.greetChannelId) as
+    | TextChannel
+    | undefined;
   if (greetChannel) {
     const embed = new EmbedBuilder()
       .setColor(0xf47fff)
       .setTitle("New Server Boost! 🎉")
       .setDescription(`${member} has boosted the server!`)
       .addFields(
-        { name: "Total Boosts", value: String(record.boostCounts ?? 1), inline: true },
-        { name: "Member", value: member.user.tag, inline: true }
+        {
+          name: "Total Boosts",
+          value: String(record.boostCounts ?? 1),
+          inline: true,
+        },
+        { name: "Member", value: member.user.tag, inline: true },
       )
       .setTimestamp();
 
     await greetChannel.send({ embeds: [embed] });
   }
 
-  const logChannel = guild.channels.cache.get(config.logChannelId) as TextChannel | undefined;
+  const logChannel = guild.channels.cache.get(config.logChannelId) as
+    | TextChannel
+    | undefined;
   if (logChannel) {
     const logEmbed = new EmbedBuilder()
       .setColor(0x57f287)
       .setTitle("Boost Started")
       .addFields(
-        { name: "User", value: `${member.user.tag} (${member.id})`, inline: false },
-        { name: "Total Boost Count", value: String(record.boostCounts ?? 1), inline: true }
+        {
+          name: "User",
+          value: `${member.user.tag} (${member.id})`,
+          inline: false,
+        },
+        {
+          name: "Total Boost Count",
+          value: String(record.boostCounts ?? 1),
+          inline: true,
+        },
       )
       .setTimestamp();
 
@@ -62,7 +100,9 @@ async function onBoostStart(member: GuildMember, config: Config): Promise<void>
   }
 
   try {
-    await member.send(`Thank you for boosting the server! You now have access to booster perks.`);
+    await member.send(
+      `Thank you for boosting the server! You now have access to booster perks.`,
+    );
   } catch {
     // DMs may be closed
   }
@@ -78,17 +118,27 @@ async function onBoostEnd(member: GuildMember, config: Config): Promise<void> {
   await removeAllLevelRoles(member);
   await deleteCustomRole(guild, member.id);
 
-  const logChannel = guild.channels.cache.get(config.logChannelId) as TextChannel | undefined;
+  const logChannel = guild.channels.cache.get(config.logChannelId) as
+    | TextChannel
+    | undefined;
   if (logChannel) {
     const logEmbed = new EmbedBuilder()
       .setColor(0xed4245)
       .setTitle("Boost Ended")
       .addFields(
-        { name: "User", value: `${member.user.tag} (${member.id})`, inline: false },
-        { name: "Historical Boost Count", value: String(result.boostCounts ?? 0), inline: true }
+        {
+          name: "User",
+          value: `${member.user.tag} (${member.id})`,
+          inline: false,
+        },
+        {
+          name: "Historical Boost Count",
+          value: String(result.boostCounts ?? 0),
+          inline: true,
+        },
       )
       .setTimestamp();
 
     await logChannel.send({ embeds: [logEmbed] });
   }
-}
\ No newline at end of file
+}