diff --git a/README.md b/README.md
index 4137a7a..489d241 100644
--- a/README.md
+++ b/README.md
@@ -14,11 +14,7 @@ cia-unix/
 ├─ makerom
 └─ Encrypted Game.cia
 ```
-
-## Contributors
-ctrtool and makerom are from [*3DSGuy* repository](https://github.com/3DSGuy/Project_CTR)
-
-*[AdawareDeveloper](https://github.com/AdawareDeveloper)* contributed translating the [windows-only version](https://github.com/matiffeder/3DS-stuff/blob/master/Batch%20CIA%203DS%20Decryptor.bat)
+**ctrtool** and **makerom** can be downloaded with `dltools.sh`
 
 ## 📋 Roadmap
 - [x] Decrypt .cia
@@ -33,3 +29,8 @@ You’ll need the [Crystal compiler](https://crystal-lang.org/install/)
 `crystal build cia-unix.cr --release`
 
 Dependencies can be compiled with [makerom](https://github.com/3DSGuy/Project_CTR/tree/master/makerom) and [ctrtool](https://github.com/3DSGuy/Project_CTR/tree/master/ctrtool) make files
+
+## Contributors
+ctrtool and makerom are from [*3DSGuy* repository](https://github.com/3DSGuy/Project_CTR)
+
+*[AdawareDeveloper](https://github.com/AdawareDeveloper)* contributed translating the [windows-only version](https://github.com/matiffeder/3DS-stuff/blob/master/Batch%20CIA%203DS%20Decryptor.bat)
\ No newline at end of file
diff --git a/cia-unix.cr b/cia-unix.cr
index df08e4c..2017231 100644
--- a/cia-unix.cr
+++ b/cia-unix.cr
@@ -22,12 +22,29 @@ def gen_args(name : String, part_count : Int32) : String
     return args
 end
 
+# dependencies check
+tools = ["python2.7", "./ctrtool", "./makerom", "decrypt.py"]
+tools.each do |tool|
+    if !File.exists? %x[which #{tool}].chomp
+        case tool
+        when "python2.7"
+            abort "#{"Python 2.7".colorize.mode :bold} not found. Install it before continue"
+        when "decrypt.py"
+            if !File.exists? tool
+                abort "#{tool.colorize.mode :bold} not found. Make sure it's located in the #{"same directory".colorize.mode :underline}"
+            end
+        else
+            abort "#{tool.lchop("./").colorize.mode :bold} not found. Make sure it's located in the #{"same directory".colorize.mode :underline}"
+        end
+    end
+end
+
 Dir["*.cia"].each do |cia|
     if cia.includes? "decrypted"
         next
     end
 
-    puts "Decrypting: #{cia.colorize.mode(:bold)}..."
+    puts "Decrypting: #{cia.colorize.mode :bold}..."
     cutn : String = cia.chomp ".cia"
     args : String = ""
     content = %x[./ctrtool -tmd '#{cia}']
@@ -44,7 +61,7 @@ Dir["*.cia"].each do |cia|
         log.puts %x[./makerom -f cia -ignoresign -target p -o '#{cutn}-decfirst.cia' #{args}]
         
     elsif content.match /T.*D.*0004000E/
-        puts "CIA Type: #{"Patch".colorize.mode(:bold)}"
+        puts "CIA Type: #{"Patch".colorize.mode :bold}"
         log.puts %x[python2.7 decrypt.py '#{cia}']
 
         patch_parts : Int32 = Dir["#{cutn}.*.ncch"].size
@@ -54,7 +71,7 @@ Dir["*.cia"].each do |cia|
         check_decrypt("#{cutn} (Patch)", "cia")
 
     elsif content.match /T.*D.*0004008C/
-        puts "CIA Type: #{"DLC".colorize.mode(:bold)}"
+        puts "CIA Type: #{"DLC".colorize.mode :bold}"
         log.puts %x[python2.7 decrypt.py '#{cia}']
 
         dlc_parts : Int32 = Dir["#{cutn}.*.ncch"].size
diff --git a/dltools.sh b/dltools.sh
new file mode 100755
index 0000000..2637810
--- /dev/null
+++ b/dltools.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+bold=$(tput bold)
+normal=$(tput sgr0)
+
+if [[ "$OSTYPE" == "darwin"* ]]; then
+    echo " * Downloading ${bold}ctrtool${normal}"
+    wget https://github.com/3DSGuy/Project_CTR/releases/download/ctrtool-v0.7/ctrtool-v0.7-macos_x86_64.zip -q
+    echo " * Extracting ${bold}ctrtool${normal}"
+    unzip -qq ctrtool-v0.7-macos_x86_64.zip -d ctrtool-v0.7-macos_x86_64
+    mv ctrtool-v0.7-macos_x86_64/ctrtool $(cd "$(dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd)/ctrtool
+    echo " * Downloading ${bold}makerom${normal}"
+    wget https://github.com/3DSGuy/Project_CTR/releases/download/makerom-v0.18/makerom-v0.18-macos_x86_64.zip -q
+    echo " * Extracting ${bold}makerom${normal}"
+    unzip -qq makerom-v0.18-macos_x86_64.zip -d makerom-v0.18-macos_x86_64
+    mv makerom-v0.18-macos_x86_64/makerom $(cd "$(dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd)/makerom
+    
+    echo " * Cleaning up"
+    rm -rf ctrtool-v0.7-macos_x86_64.zip ctrtool-v0.7-macos_x86_64
+    rm -rf makerom-v0.18-macos_x86_64.zip makerom-v0.18-macos_x86_64
+
+elif [[ "$OSTYPE" == "linux-gnu"* ]]; then
+    echo " * Downloading ${bold}ctrtool${normal}"
+    wget https://github.com/3DSGuy/Project_CTR/releases/download/ctrtool-v0.7/ctrtool-v0.7-ubuntu_x86_64.zip -q
+    echo " * Extracting ${bold}ctrtool${normal}"
+    unzip -qq ctrtool-v0.7-ubuntu_x86_64.zip -d ctrtool-v0.7-ubuntu_x86_64
+    mv ctrtool-v0.7-ubuntu_x86_64/ctrtool $(cd "$(dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd)/ctrtool
+    echo " * Downloading ${bold}makerom${normal}"
+    wget https://github.com/3DSGuy/Project_CTR/releases/download/makerom-v0.18/makerom-v0.18-ubuntu_x86_64.zip -q
+    echo " * Extracting ${bold}makerom${normal}"
+    unzip -qq makerom-v0.18-ubuntu_x86_64.zip -d makerom-v0.18-ubuntu_x86_64
+    mv makerom-v0.18-ubuntu_x86_64/makerom $(cd "$(dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd)/makerom
+
+    echo " * Cleaning up"
+    rm -rf ctrtool-v0.7-ubuntu_x86_64.zip ctrtool-v0.7-ubuntu_x86_64
+    rm -rf makerom-v0.18-ubuntu_x86_64.zip makerom-v0.18-ubuntu_x86_64
+fi
\ No newline at end of file