diff --git a/src/SMAPI.Toolkit/Framework/ModScanning/ModScanner.cs b/src/SMAPI.Toolkit/Framework/ModScanning/ModScanner.cs
index 12333c4e..84329f63 100644
--- a/src/SMAPI.Toolkit/Framework/ModScanning/ModScanner.cs
+++ b/src/SMAPI.Toolkit/Framework/ModScanning/ModScanner.cs
@@ -5,6 +5,7 @@ using System.Linq;
 using System.Text.RegularExpressions;
 using StardewModdingAPI.Toolkit.Serialization;
 using StardewModdingAPI.Toolkit.Serialization.Models;
+using StardewModdingAPI.Toolkit.Utilities;
 
 namespace StardewModdingAPI.Toolkit.Framework.ModScanning
 {
@@ -251,8 +252,19 @@ namespace StardewModdingAPI.Toolkit.Framework.ModScanning
         {
             while (true)
             {
-                // check for manifest in current folder
-                FileInfo file = new(Path.Combine(folder.FullName, "manifest.json"));
+                // check for conventional manifest in current folder
+                const string defaultName = "manifest.json";
+                FileInfo file = new(Path.Combine(folder.FullName, defaultName));
+                if (file.Exists)
+                    return file;
+
+                // check for manifest with incorrect capitalization
+                {
+                    CaseInsensitivePathLookup pathLookup = new(folder.FullName, SearchOption.TopDirectoryOnly); // don't use GetCachedFor, since we only need it temporarily
+                    string realName = pathLookup.GetFilePath(defaultName);
+                    if (realName != defaultName)
+                        file = new(Path.Combine(folder.FullName, realName));
+                }
                 if (file.Exists)
                     return file;
 
diff --git a/src/SMAPI.Toolkit/Utilities/CaseInsensitivePathLookup.cs b/src/SMAPI.Toolkit/Utilities/CaseInsensitivePathLookup.cs
index 2e149e3c..12fad008 100644
--- a/src/SMAPI.Toolkit/Utilities/CaseInsensitivePathLookup.cs
+++ b/src/SMAPI.Toolkit/Utilities/CaseInsensitivePathLookup.cs
@@ -25,10 +25,11 @@ namespace StardewModdingAPI.Toolkit.Utilities
         *********/
         /// <summary>Construct an instance.</summary>
         /// <param name="rootPath">The root directory path for relative paths.</param>
-        public CaseInsensitivePathLookup(string rootPath)
+        /// <param name="searchOption">Which directories to scan from the root.</param>
+        public CaseInsensitivePathLookup(string rootPath, SearchOption searchOption = SearchOption.AllDirectories)
         {
             this.RootPath = rootPath;
-            this.RelativePathCache = new(this.GetRelativePathCache);
+            this.RelativePathCache = new(() => this.GetRelativePathCache(searchOption));
         }
 
         /// <summary>Get the exact capitalization for a given relative file path.</summary>
@@ -108,11 +109,12 @@ namespace StardewModdingAPI.Toolkit.Utilities
         }
 
         /// <summary>Get a case-insensitive lookup of file paths (see <see cref="RelativePathCache"/>).</summary>
-        private Dictionary<string, string> GetRelativePathCache()
+        /// <param name="searchOption">Which directories to scan from the root.</param>
+        private Dictionary<string, string> GetRelativePathCache(SearchOption searchOption)
         {
             Dictionary<string, string> cache = new(StringComparer.OrdinalIgnoreCase);
 
-            foreach (string path in Directory.EnumerateFiles(this.RootPath, "*", SearchOption.AllDirectories))
+            foreach (string path in Directory.EnumerateFiles(this.RootPath, "*", searchOption))
             {
                 string relativePath = path.Substring(this.RootPath.Length + 1);