diff --git a/Readme.md b/Readme.md
index cf8c359..3135d85 100644
--- a/Readme.md
+++ b/Readme.md
@@ -32,21 +32,33 @@ dub build --config=executable --build=release-nobounds --compiler=ldc2
 ### CLI Usage
 
 ```shell
-❯ minijson --help
+> minijson --help
+
+Usage: minijson [--files FILES ...] [--comment] [--str STR ...] [--file FILE ...] [-h]
 
 minijson: minify json files with support for comments
-    minijson --file file1.json --file file2.json
-    minijson --file file1_with_comment.json --file file2_with_comment.json --comment
 
-    minijson --string '{"some_json": "string_here"}'
-    minijson --string '{"some_json": "string_here"} //comment' --comment
+    # Minify the specified files
+    minijson ./dist/**/*.json ./build/a.json
+
+    # Minify the specified files (supports comments)
+    minijson --comment file1_with_comment.json file2_with_comment.json
+
+    # Minify the specified json string
+    minijson --str '{"some_json": "string_here"}'
+
+    # Minify the specified json string (supports comments)
+    minijson --comment --str '{"some_json": "string_here"} //comment'
 
     More information at https://github.com/aminya/minijson
 
-      --file an array of files to minify
-    --string a json string to minify
-   --comment a flag to support comments in json
--h    --help This help information.
+
+Optional arguments:
+  --files FILES ...
+  --comment
+  --str STR ...
+  --file FILE ...
+  -h, --help           Show this help message and exit
 ```
 
 ### Node API
diff --git a/dub.sdl b/dub.sdl
index bdbb23f..2552b9a 100644
--- a/dub.sdl
+++ b/dub.sdl
@@ -10,8 +10,11 @@ sourcePaths "./src/native"
 importPaths "./src/native"
 
 dependency "automem" version="0.6.7"
-preGenerateCommands "git submodule update --init" # despacer download
 dependency "despacer" path="despacer"
+dependency "d-glob" version="~>0.4.0"
+dependency "argparse" version="~>1.3.0"
+
+preGenerateCommands "git submodule update --init" # despacer download
 
 configuration "executable" {
   targetType "executable"
@@ -32,7 +35,7 @@ configuration "benchmark" {
 
 # -------- Build Options and configurations --------
 
-dflags "-vgc"
+// dflags "-vgc"
 
 buildType "release-nobounds" {
   buildOptions "releaseMode" "optimize" "inline" "noBoundsCheck"
diff --git a/dub.selections.json b/dub.selections.json
index f9bacd1..8396bed 100644
--- a/dub.selections.json
+++ b/dub.selections.json
@@ -1,7 +1,10 @@
 {
 	"fileVersion": 1,
 	"versions": {
+		"argparse": "1.3.0",
 		"automem": "0.6.7",
+		"bdd": "1.3.0",
+		"d-glob": "0.4.0",
 		"despacer": {"path":"despacer/"},
 		"test_allocator": "0.3.4",
 		"unit-threaded": "2.2.0"
diff --git a/src/native/cli.d b/src/native/cli.d
index 296acd4..3bd0d17 100644
--- a/src/native/cli.d
+++ b/src/native/cli.d
@@ -1,48 +1,65 @@
 module minijson.cli;
 
-import minijson.lib : minifyFiles, minifyString;
+import minijson.lib : minifyFiles, minifyStrings;
+import argparse;
 
-import std.getopt : getopt, defaultGetoptPrinter, GetoptResult;
+@(Command("minijson")
+    .Description(`minijson: minify json files with support for comments
 
-/** Print help */
-void printHelp(GetoptResult optResult) @trusted
-{
-  return defaultGetoptPrinter(`minijson: minify json files with support for comments
-    minijson --file file1.json --file file2.json
-    minijson --file file1_with_comment.json --file file2_with_comment.json --comment
+    # Minify the specified files
+    minijson ./dist/**/*.json ./build/a.json
+
+    # Minify the specified files (supports comments)
+    minijson --comment file1_with_comment.json file2_with_comment.json
+
+    # Minify the specified json string
+    minijson --str '{"some_json": "string_here"}'
 
-    minijson --string '{"some_json": "string_here"}'
-    minijson --string '{"some_json": "string_here"} //comment' --comment
+    # Minify the specified json string (supports comments)
+    minijson --comment --str '{"some_json": "string_here"} //comment'
 
     More information at https://github.com/aminya/minijson
-  `, optResult.options);
+  `)
+)
+struct Options
+{
+  @TrailingArguments string[] files;
+  bool comment = false;
+  string[] str;
+  // (Deprecated) A list of files to minify (for backwards compatiblitity with getopt)
+  string[] file;
 }
 
-void main(string[] args) @trusted
+int actualMain(Options opts) @trusted
 {
-  string[] files;
-  string jsonString;
-  bool hasComment = false;
+  try
+  {
+    // minify the given files
+    if (opts.files.length > 0 || opts.file.length > 0)
+    {
+      const auto files = opts.files ~ opts.file;
+      minifyFiles(files, opts.comment);
+    }
 
-  auto optResult = getopt(args, "file", "an array of files to minify", &files, "string",
-      "a json string to minify", &jsonString, "comment", "a flag to support comments in json", &hasComment);
+    // minify the given string and print to stdout
+    if (opts.str)
+    {
+      import std.algorithm : each;
+      import std.stdio : writeln;
 
-  if (optResult.helpWanted || (!files && !jsonString))
-  {
-    return printHelp(optResult);
-  }
+      minifyStrings(opts.str, opts.comment).each!writeln;
 
-  // minify the given files
-  if (files)
-  {
-    minifyFiles(files, hasComment);
+    }
   }
-
-  // minify the given string and print to stdout
-  if (jsonString)
+  catch (Exception e)
   {
-    import std : write;
+    import std.stdio : stderr;
 
-    write(minifyString(jsonString, hasComment));
+    stderr.writeln("Error: ", e.msg);
+    return 1;
   }
+
+  return 0;
 }
+
+mixin CLI!Options.main!((args) { return actualMain(args); });
diff --git a/src/native/lib.d b/src/native/lib.d
index 813f1fa..906745a 100644
--- a/src/native/lib.d
+++ b/src/native/lib.d
@@ -162,17 +162,66 @@ private bool hasNoSpace(const ref string str) @trusted
   }
 }
 
+/**
+  Minify the given JSON strings in parallel
+
+  Params:
+    jsonStrings  = the json strings you want to minify
+    hasComment = a boolean to support comments in json. Default: `false`.
+
+  Return:
+    the minified json strings
+*/
+string[] minifyStrings(in string[] jsonStrings, in bool hasComment = false) @trusted
+{
+  import std.algorithm: map;
+  import std.array: array;
+
+  return jsonStrings.map!(jsonString => minifyString(jsonString, hasComment)).array();
+}
+
 /**
   Minify the given files in place. It minifies the files in parallel.
 
   Params:
-    files = the paths to the files.
+    paths = the paths to the files. It could be glob patterns.
     hasComment = a boolean to support comments in json. Default: `false`.
 */
-void minifyFiles(in string[] files, in bool hasComment = false)
+void minifyFiles(in string[] paths, in bool hasComment = false) @trusted
 {
   import std.parallelism : parallel;
-  import std.file : readText, write;
+  import std.algorithm;
+  import std.array;
+  import std.file : dirEntries, SpanMode, readText, write, isFile, isDir, exists;
+  import std.path : globMatch;
+  import glob : glob;
+  import std.stdio : writeln;
+
+  // get the files from the given paths (resolve glob patterns)
+  auto files = paths
+    .map!((path) {
+      if (path.exists)
+      {
+        if (path.isFile)
+        {
+          return [path];
+        }
+        else if (path.isDir)
+        {
+          return glob(path ~ "/**/*.json");
+        }
+        else
+        {
+          throw new Exception("The given path is not a file or a directory: " ~ path);
+        }
+      }
+      else
+      {
+        return glob(path);
+      }
+    })
+    .joiner()
+    .array();
 
   foreach (file; files.parallel())
   {
diff --git a/src/node/lib.ts b/src/node/lib.ts
index 41f1f89..667fc50 100644
--- a/src/node/lib.ts
+++ b/src/node/lib.ts
@@ -51,7 +51,7 @@ export async function minifyFiles(files: string[], hasComment = false): Promise<
  * @throws {Promise<string | Error>} The promise is rejected with the reason for failure
  */
 export async function minifyString(jsonString: string, hasComment = false): Promise<string> {
-  const args = ["--string", jsonString]
+  const args = ["--str", jsonString]
   if (hasComment) {
     args.push("--comment")
   }