diff --git a/CHUNITHM-Patch-Finder.csproj b/CHUNITHM-Patch-Finder.csproj
index 03096e7..7dde766 100644
--- a/CHUNITHM-Patch-Finder.csproj
+++ b/CHUNITHM-Patch-Finder.csproj
@@ -15,10 +15,10 @@
     </ItemGroup>
 
     <ItemGroup>
-        <ContentWithTargetPath Include="patterns.yaml">
-            <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-            <TargetPath>%(Filename)%(Extension)</TargetPath>
-        </ContentWithTargetPath>
+      <ContentWithTargetPath Include="Patterns/**">
+        <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+        <TargetPath>Patterns/%(RecursiveDir)/%(Filename)%(Extension)</TargetPath>
+      </ContentWithTargetPath>
     </ItemGroup>
     
 </Project>
diff --git a/patterns_amdaemon.yaml b/Patterns/amdaemon.yaml
similarity index 95%
rename from patterns_amdaemon.yaml
rename to Patterns/amdaemon.yaml
index 083c061..26bd626 100644
--- a/patterns_amdaemon.yaml
+++ b/Patterns/amdaemon.yaml
@@ -16,4 +16,4 @@
   patches:
     - offset: 0x03
       off: [0x28]
-      on: [0x08]
\ No newline at end of file
+      on: [0x08]
diff --git a/patterns.yaml b/Patterns/chusanApp.yaml
similarity index 100%
rename from patterns.yaml
rename to Patterns/chusanApp.yaml
diff --git a/Program.cs b/Program.cs
index 93c31e1..6a8d582 100644
--- a/Program.cs
+++ b/Program.cs
@@ -11,17 +11,29 @@ using YamlDotNet.Serialization.NamingConventions;
 
 if (args.Length < 1)
 {
-    Console.WriteLine($"Usage: {Environment.ProcessPath} <PATH TO EXE>");
+    Console.WriteLine($"Usage: {Environment.ProcessPath} <PATH TO EXE> [PATH TO PATTERNS]");
     Environment.Exit(22); // EINVAL
 }
 
 var deserializer = new DeserializerBuilder()
     .WithNamingConvention(LowerCaseNamingConvention.Instance)
     .Build();
+var exeFile = args[0];
+var exeFileName = Path.GetFileName(exeFile);
+var patternsFile = args.Length >= 2 
+    ? args[1] 
+    : Path.Join("Patterns", Path.GetFileNameWithoutExtension(exeFile) + ".yaml");
+
+if (!Path.Exists(patternsFile))
+{
+    Console.WriteLine($"[ERROR] Could not find patterns file {patternsFile}. Nothing to search for.");
+    Environment.Exit(1);
+}
+
 var patches =
     deserializer.Deserialize<Pattern[]>(
-        File.ReadAllText("patterns.yaml"));
-var binary = File.ReadAllBytes(args[0]);
+        File.ReadAllText(patternsFile));
+var binary = File.ReadAllBytes(exeFile);
 var scanner = new Scanner(binary);
 var exportedPatches = new List<BemaniPatcherPatch>();
 
@@ -70,7 +82,7 @@ foreach (var patch in patches)
 }
 
 // max track count patch
-if (Path.GetFileName(args[0]) == "chusanApp.exe")
+if (exeFileName == "chusanApp.exe")
 {
     var offset = scanner
         .FindPatterns([
diff --git a/README.md b/README.md
index 07969b2..07fb486 100644
--- a/README.md
+++ b/README.md
@@ -8,11 +8,13 @@ Does not do any patch validation for now.
 
 ## Usage
 ```sh
-./CHUNITHM-Patch-Finder <PATH TO EXE>
+./CHUNITHM-Patch-Finder <PATH TO EXE> [PATH TO PATTERNS]
 ```
 
-The program expects a file called `patterns.yaml` (see files in
-repo for example) and outputs BemaniPatcher-compatible patches
-to `patches.json`.
+If a patterns file is not specified, the program defaults to
+finding a file named `[file].yaml` under its `Patterns`
+directory.
+
+The output is in a format compatible with [BemaniPatcher](https://github.com/mon/BemaniPatcher).
 
 [How to find signatures](https://reloaded-project.github.io/Reloaded-II/CheatSheet/SignatureScanning/)
\ No newline at end of file