diff --git a/lib/Engine/Fuzzer.pm b/lib/Engine/Fuzzer.pm
index f0e2eb2..d49993e 100755
--- a/lib/Engine/Fuzzer.pm
+++ b/lib/Engine/Fuzzer.pm
@@ -7,39 +7,41 @@ package Engine::Fuzzer {
     sub new {
         my ($self, $timeout, $headers, $skipssl, $proxy) = @_;
 
-        my $userAgent = Mojo::UserAgent -> new() -> request_timeout($timeout) -> insecure($skipssl);
+        my $userAgent = Mojo::UserAgent->new()->request_timeout($timeout)->insecure($skipssl);
 
         if ($proxy) {
-            $userAgent -> proxy -> http($proxy);
-            $userAgent -> proxy -> https($proxy);
+            $userAgent->proxy->http($proxy);
+            $userAgent->proxy->https($proxy);
         }
 
-        bless {
+        my $instance = bless {
             useragent => $userAgent,
             headers   => $headers
         }, $self;
+
+        return $instance;
     }
 
     sub request {
         my ($self, $method, $agent, $endpoint, $payload, $accept) = @_;
 
-        my $request = $self -> {useragent} -> build_tx (
+        my $request = $self->{useragent}->build_tx(
             $method => $endpoint => {
                 "User-Agent" => $agent,
-                %{$self -> {headers}}
+                %{$self->{headers}}
             } => $payload || ""
         );
 
         try {
-            my $response  = $self -> {useragent} -> start($request) -> result();
+            my $response = $self->{useragent}->start($request)->result();
 
             my $result = {
                 "Method"   => $method,
                 "URL"      => $endpoint,
-                "Code"     => $response -> code(),
-                "Response" => $response -> message(),
-                "Content"  => $response -> body(),
-                "Length"   => $response -> headers() -> content_length() || "0"
+                "Code"     => $response->code(),
+                "Response" => $response->message(),
+                "Content"  => $response->body(),
+                "Length"   => $response->headers()->content_length() || "0"
             };
 
             return $result;
@@ -47,7 +49,9 @@ package Engine::Fuzzer {
 
         catch {
             return 0;
-        }
+        };
+        
+        return;
     }
 }
 
diff --git a/lib/Engine/FuzzerThread.pm b/lib/Engine/FuzzerThread.pm
index 8f10d7c..10525de 100644
--- a/lib/Engine/FuzzerThread.pm
+++ b/lib/Engine/FuzzerThread.pm
@@ -4,72 +4,72 @@ package Engine::FuzzerThread {
     use threads;
     use warnings;
     use Engine::Fuzzer;
-
+   
     sub new {
         my (
             $self, $queue, $target, $methods, $agent, $headers, $accept,
             $timeout, $return, $payload, $json, $delay, $exclude, $skipssl,
             $length, $content, $proxy
         ) = @_;
-
+       
         my @verbs         = split (/,/, $methods);
         my @valid_codes   = split /,/, $return || "";
         my @invalid_codes = split /,/, $exclude || "";
-
+       
         my $fuzzer = Engine::Fuzzer -> new($timeout, $headers, $skipssl, $proxy);
         my $format = JSON -> new() -> allow_nonref() -> pretty();
-
+       
         my $cmp;
-
+       
         if ($length) {
             ($cmp, $length) = $length =~ /([>=<]{0,2})(\d+)/;
-
             $cmp = sub { $_[0] >= $length } if ($cmp eq ">=");
             $cmp = sub { $_[0] <= $length } if ($cmp eq "<=");
             $cmp = sub { $_[0] != $length } if ($cmp eq "<>");
             $cmp = sub { $_[0]  > $length } if ($cmp eq  ">");
             $cmp = sub { $_[0]  < $length } if ($cmp eq  "<");
-            $cmp = sub { $_[0] == $length } if (!$cmp or $cmp eq "=");
+            $cmp = sub { $_[0] == $length } if (defined($cmp) || $cmp eq "="); 
         }
-
+       
         async {
             while (defined(my $resource = $queue -> dequeue())) {
-                my $endpoint = $target . $resource;
+                my $endpoint = $target . $resource;               
                 my $found = 0;
-
+               
                 for my $verb (@verbs) {
                     my $result = $fuzzer -> request($verb, $agent, $endpoint, $payload, $accept);
-
+                   
                     unless ($result) {
                         next;
                     }
-
+                   
                     my $status = $result -> {Code};
-
-                    if (grep(/^$status$/, @invalid_codes) || ($return && !grep(/^$status$/, @valid_codes))) {
+                   
+                    if (scalar(grep { $_ eq $status } @invalid_codes) || ($return && !scalar(grep { $_ eq $status } @valid_codes))) {
                         next;
                     }
-                    
+                   
                     if ($length && !($cmp -> ($result -> {Length}))) {
                         next;
                     }
-
+                   
                     my $message = $json ? $format -> encode($result) : sprintf(
                         "Code: %d | URL: %s | Method: %s | Response: %s | Length: %s",
                         $status, $result -> {URL}, $result -> {Method},
                         $result -> {Response} || "?", $result -> {Length}
                     );
-
+                   
                     print $message, "\n" if !$content || $result -> {Content} =~ m/$content/;
-
+                   
                     sleep($delay);
+                   
                     $found = 1;
                 }
             }
         };
-
+        
         return 1;
     }
 }
 
-1;
\ No newline at end of file
+1;
diff --git a/lib/Engine/Orchestrator.pm b/lib/Engine/Orchestrator.pm
index 22a0ded..7ed1759 100644
--- a/lib/Engine/Orchestrator.pm
+++ b/lib/Engine/Orchestrator.pm
@@ -1,7 +1,8 @@
-package Engine::Orchestrator  {
+package Engine::Orchestrator {
     use strict;
     use threads;
     use warnings;
+    use Fcntl qw(O_RDONLY);
     use Engine::FuzzerThread;
 
     my $wordlist_queue;
@@ -13,20 +14,22 @@ package Engine::Orchestrator  {
         for (1 .. $number) {
             return unless (@{$list} > 0);
 
-            if (eof($list -> [0])) {
+            if (eof($list->[0])) {
                 close shift @{$list};
 
-                (@{$list} > 0) || $wordlist_queue -> end();
+                (@{$list} > 0) || $wordlist_queue->end();
 
-                next
+                next;
             }
 
-            my $filehandle = $list -> [0];
+            my $filehandle = $list->[0];
 
             chomp(my $line = <$filehandle>);
 
-            $wordlist_queue -> enqueue($line);
+            $wordlist_queue->enqueue($line);
         }
+        
+        return;
     }
 
     sub add_target {
@@ -39,6 +42,8 @@ package Engine::Orchestrator  {
 
             push @targets_queue, $target;
         }
+        
+        return;
     }
 
     sub run_fuzzer {
@@ -51,27 +56,30 @@ package Engine::Orchestrator  {
                 $target = shift @targets_queue;
             }
 
-            $self -> threaded_fuzz($target, %options);
+            $self->threaded_fuzz($target, %options);
         }
+        
+        return 0;
     }
 
     sub threaded_fuzz {
         my ($self, $target, %options) = @_;
 
         my @current = map {
-            open(my $filehandle, "<$_") || die "$0: Can't open $_: $!";
+            my $filehandle;
+            sysopen($filehandle, $_, O_RDONLY) || die "$0: Can't open $_: $!";
 
-            $filehandle
+            $filehandle;
         } glob($options{wordlist});
 
-        $wordlist_queue = Thread::Queue -> new();
+        $wordlist_queue = Thread::Queue->new();
 
-        use constant CONCURRENT_TASKS => 10;
+        my $CONCURRENT_TASKS = 10;
 
-        fill_queue(\@current, CONCURRENT_TASKS * $options{tasks});
+        fill_queue(\@current, $CONCURRENT_TASKS * $options{tasks});
 
         for (1 .. $options{tasks}) {
-            Engine::FuzzerThread -> new (
+            Engine::FuzzerThread->new(
                 $wordlist_queue,
                 $target,
                 $options{method},
@@ -92,11 +100,13 @@ package Engine::Orchestrator  {
             );
         }
 
-        while (threads -> list(threads::running) > 0) {
+        while (threads->list(threads::running) > 0) {
             fill_queue(\@current, $options{tasks});
         }
 
-        map { $_ -> join() } threads -> list(threads::all);
+        map { $_->join() } threads->list(threads::all);
+
+        close $_ for @current;
 
         return 0;
     }