diff --git a/README.md b/README.md
index fac62db..72e1b58 100644
--- a/README.md
+++ b/README.md
@@ -7,13 +7,13 @@
 
 ### Features:
 
-- Support all 7-zip formats: `7z`, `XZ`, `BZIP2`, `GZIP`, `TAR`, `ZIP`, `WIM`, `AR`, `ARJ`, `CAB`, `CHM`, `CPIO`, `CramFS`, `DMG`, `EXT`, `FAT`, `GPT`, `HFS`, `IHEX`, `ISO`, `LZH`, `LZMA`, `MBR`, `MSI`, `NSIS`, `NTFS`, `QCOW2`, `RAR`, `RPM`, `SquashFS`, `UDF`, `UEFI`, `VDI`, `VHD`, `VMDK`, `WIM`, `XAR` and `Z`
-- Unpacking archives
-- Extract any directory or file
+- Supported all 7-zip formats:
+    - Packing / unpacking: `7z`, `XZ`, `BZIP2`, `GZIP`, `TAR`, `ZIP` and `WIM`.
+    - Unpacking only: `APFS`, `AR`, `ARJ`, `Base64`, `CAB`, `CHM`, `CPIO`, `CramFS`, `DMG`, `EXT`, `FAT`, `GPT`, `HFS`, `IHEX`, `ISO`, `LZH`, `LZMA`, `MBR`, `MSI`, `NSIS`, `NTFS`, `QCOW2`, `RAR`, `RPM`, `SquashFS`, `UDF`, `UEFI`, `VDI`, `VHD`, `VHDX`, `VMDK`, `XAR` and `Z`.
 - List files and directories
 - Get contents of any file from archive
-- Delete files or directories (not `RAR`)
-- Add files or directories (not `RAR`)
+- Delete files or directories
+- Add files or directories
 
 
 ### Requirements:
@@ -21,7 +21,7 @@
 - PHP >= 8.0.2
 - allow [proc_open](https://www.php.net/proc_open) function
 - for Windows: 7-zip >= 7.30 (https://www.7-zip.org/)
-- for Linux/MacOs: p7zip >= 9.38 (https://github.com/p7zip-project/p7zip). UPD: original 7-zip supports linux since 21.01 version?
+- for Linux/MacOs: 7-zip >= 21.01 or p7zip >= 9.38 (https://github.com/p7zip-project/p7zip)
 
 
 ### Installation:
diff --git a/src/Archive7z.php b/src/Archive7z.php
index 3af22dd..d6ef9ca 100644
--- a/src/Archive7z.php
+++ b/src/Archive7z.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Archive7z;
 
 use Symfony\Component\Process\Process;
diff --git a/src/Archive7zTrait.php b/src/Archive7zTrait.php
index 147de79..82d0988 100644
--- a/src/Archive7zTrait.php
+++ b/src/Archive7zTrait.php
@@ -1,17 +1,21 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Archive7z;
 
 trait Archive7zTrait
 {
     /**
-     * 7z uses plugins (7z.so and Codecs/Rar.so) to handle archives.
-     * 7za is a stand-alone executable (7za handles less archive formats than 7z).
-     * 7zr is a light stand-alone executable that supports only 7z/LZMA/BCJ/BCJ2.
+     * 7zz  (7-Zip) - standalone full version of 7-Zip that supports all formats.
+     * 7zzs (7-Zip) - standalone full version of 7-Zip that supports all formats (static library linking).
+     * 7z  (p7zip) - 7-Zip that requires 7z.so shared library, and it supports all formats via 7z.so.
+     * 7zr (p7zip) - standalone reduced version of 7-Zip that supports some 7-Zip's formats: 7z, xz, lzma and split.
+     * 7za (p7zip) - standalone version of 7-Zip that supports some main formats: 7z, xz, lzma, zip, bzip2, gzip, tar, cab, ppmd and split.
      *
      * @var string[]
      */
-    protected static array $binary7zNix = ['/usr/bin/7z', '/usr/bin/7za', '/usr/local/bin/7z', '/usr/local/bin/7za'];
+    protected static array $binary7zNix = ['/usr/bin/7z', '/usr/bin/7za', '/usr/bin/7zz', '/usr/local/bin/7z', '/usr/local/bin/7za', '/usr/local/bin/7zz'];
     /**
      * @var string[]
      */
diff --git a/src/Entry.php b/src/Entry.php
index dff6c69..e4b3c54 100644
--- a/src/Entry.php
+++ b/src/Entry.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Archive7z;
 
 /*
diff --git a/src/Exception.php b/src/Exception.php
index f6be024..019bc61 100644
--- a/src/Exception.php
+++ b/src/Exception.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Archive7z;
 
 class Exception extends \Exception
diff --git a/src/Info.php b/src/Info.php
index 17dc6c1..b00765a 100644
--- a/src/Info.php
+++ b/src/Info.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Archive7z;
 
 /*
@@ -63,6 +65,9 @@ public function __construct(Parser $parser)
         }
     }
 
+    /**
+     * @param string[] $headerData
+     */
     private function parseHeader(array $headerData): void
     {
         foreach ($headerData as $key => $value) {
@@ -76,11 +81,11 @@ private function parseHeader(array $headerData): void
                     break;
 
                 case 'Physical Size':
-                    $this->physicalSize = $value;
+                    $this->physicalSize = (int) $value;
                     break;
 
                 case 'Headers Size':
-                    $this->headersSize = $value;
+                    $this->headersSize = (int) $value;
                     break;
 
                 case 'Method':
@@ -92,7 +97,7 @@ private function parseHeader(array $headerData): void
                     break;
 
                 case 'Blocks':
-                    $this->blocks = $value;
+                    $this->blocks = (int) $value;
                     break;
 
                 case 'Code Page':
diff --git a/src/Parser.php b/src/Parser.php
index 825016a..fb54d1f 100644
--- a/src/Parser.php
+++ b/src/Parser.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Archive7z;
 
 class Parser
diff --git a/src/SolidMode.php b/src/SolidMode.php
index 630870d..b97ec4c 100644
--- a/src/SolidMode.php
+++ b/src/SolidMode.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Archive7z;
 
 /**
diff --git a/tests/Archive7zTest.php b/tests/Archive7zTest.php
index d8b477e..1b41aac 100644
--- a/tests/Archive7zTest.php
+++ b/tests/Archive7zTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Archive7z\Tests;
 
 use Archive7z\Archive7z;
diff --git a/tests/EntryTest.php b/tests/EntryTest.php
index 12a07c4..e26700e 100644
--- a/tests/EntryTest.php
+++ b/tests/EntryTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Archive7z\Tests;
 
 use Archive7z\Archive7z;
diff --git a/tests/ExceptionTest.php b/tests/ExceptionTest.php
index 49883f7..fad668a 100644
--- a/tests/ExceptionTest.php
+++ b/tests/ExceptionTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Archive7z\Tests;
 
 use Archive7z\Exception;