diff --git a/src/components/views/DownloadModModal.vue b/src/components/views/DownloadModModal.vue
index e6a27d0c..c9c37196 100644
--- a/src/components/views/DownloadModModal.vue
+++ b/src/components/views/DownloadModModal.vue
@@ -166,7 +166,7 @@ let assignId = 0;
                 };
                 DownloadModModal.allVersions.push([currentAssignId, progressObject]);
                 setTimeout(() => {
-                    ThunderstoreDownloaderProvider.instance.download(profile, tsMod, tsVersion, thunderstorePackages, ignoreCache, (progress: number, modName: string, status: number, err: R2Error | null) => {
+                    ThunderstoreDownloaderProvider.instance.download(profile.asImmutableProfile(), tsMod, tsVersion, thunderstorePackages, ignoreCache, (progress: number, modName: string, status: number, err: R2Error | null) => {
                         const assignIndex = DownloadModModal.allVersions.findIndex(([number, val]) => number === currentAssignId);
                         if (status === StatusEnum.FAILURE) {
                             if (err !== null) {
@@ -337,7 +337,7 @@ let assignId = 0;
             DownloadModModal.allVersions.push([currentAssignId, this.downloadObject]);
             this.downloadingMod = true;
             setTimeout(() => {
-                ThunderstoreDownloaderProvider.instance.download(this.profile, tsMod, tsVersion, this.thunderstorePackages, this.ignoreCache, (progress: number, modName: string, status: number, err: R2Error | null) => {
+                ThunderstoreDownloaderProvider.instance.download(this.profile.asImmutableProfile(), tsMod, tsVersion, this.thunderstorePackages, this.ignoreCache, (progress: number, modName: string, status: number, err: R2Error | null) => {
                     const assignIndex = DownloadModModal.allVersions.findIndex(([number, val]) => number === currentAssignId);
                     if (status === StatusEnum.FAILURE) {
                         if (err !== null) {
diff --git a/src/providers/ror2/downloading/ThunderstoreDownloaderProvider.ts b/src/providers/ror2/downloading/ThunderstoreDownloaderProvider.ts
index 2cece8a1..190b1703 100644
--- a/src/providers/ror2/downloading/ThunderstoreDownloaderProvider.ts
+++ b/src/providers/ror2/downloading/ThunderstoreDownloaderProvider.ts
@@ -4,7 +4,7 @@ import ThunderstoreMod from '../../../model/ThunderstoreMod';
 import ThunderstoreCombo from '../../../model/ThunderstoreCombo';
 import R2Error from '../../../model/errors/R2Error';
 import ExportMod from '../../../model/exports/ExportMod';
-import Profile from '../../../model/Profile';
+import Profile, { ImmutableProfile } from '../../../model/Profile';
 
 export default abstract class ThunderstoreDownloaderProvider {
 
@@ -58,6 +58,7 @@ export default abstract class ThunderstoreDownloaderProvider {
     /**
      * A top-level method to download the latest version of a mod including its dependencies.
      *
+     * @param profile           The profile the mod is downloaded for (needed to prevent dependencies from updating existing mods).
      * @param mod               The mod to be downloaded.
      * @param modVersion        The version of the mod to download.
      * @param allMods           An array of all mods available from the Thunderstore API.
@@ -65,7 +66,8 @@ export default abstract class ThunderstoreDownloaderProvider {
      * @param callback          Callback to show the current state of the downloads.
      * @param completedCallback Callback to perform final actions against. Only called if {@param callback} has not returned a failed status.
      */
-    public abstract download(profile: Profile, mod: ThunderstoreMod, modVersion: ThunderstoreVersion, allMods: ThunderstoreMod[], ignoreCache: boolean,
+    public abstract download(profile: ImmutableProfile, mod: ThunderstoreMod, modVersion: ThunderstoreVersion,
+                    allMods: ThunderstoreMod[], ignoreCache: boolean,
                     callback: (progress: number, modName: string, status: number, err: R2Error | null) => void,
                     completedCallback: (modList: ThunderstoreCombo[]) => void): void;
 
diff --git a/src/r2mm/downloading/BetterThunderstoreDownloader.ts b/src/r2mm/downloading/BetterThunderstoreDownloader.ts
index 84fcc36d..0484e7d0 100644
--- a/src/r2mm/downloading/BetterThunderstoreDownloader.ts
+++ b/src/r2mm/downloading/BetterThunderstoreDownloader.ts
@@ -10,7 +10,7 @@ import PathResolver from '../../r2mm/manager/PathResolver';
 import * as path from 'path';
 import FsProvider from '../../providers/generic/file/FsProvider';
 import FileWriteError from '../../model/errors/FileWriteError';
-import Profile from '../../model/Profile';
+import { ImmutableProfile } from '../../model/Profile';
 import ExportMod from '../../model/exports/ExportMod';
 import ThunderstoreDownloaderProvider from '../../providers/ror2/downloading/ThunderstoreDownloaderProvider';
 import ManagerInformation from '../../_managerinf/ManagerInformation';
@@ -117,7 +117,7 @@ export default class BetterThunderstoreDownloader extends ThunderstoreDownloader
         });
     }
 
-    public async download(profile: Profile, mod: ThunderstoreMod, modVersion: ThunderstoreVersion,
+    public async download(profile: ImmutableProfile, mod: ThunderstoreMod, modVersion: ThunderstoreVersion,
                            allMods: ThunderstoreMod[], ignoreCache: boolean,
                            callback: (progress: number, modName: string, status: number, err: R2Error | null) => void,
                            completedCallback: (modList: ThunderstoreCombo[]) => void) {
@@ -128,7 +128,7 @@ export default class BetterThunderstoreDownloader extends ThunderstoreDownloader
         combo.setVersion(modVersion);
         let downloadCount = 0;
 
-        const modList = await ProfileModList.getModList(profile.asImmutableProfile());
+        const modList = await ProfileModList.getModList(profile);
         if (modList instanceof R2Error) {
             return callback(0, mod.getName(), StatusEnum.FAILURE, modList);
         }