diff --git a/.jazzy.yaml b/.jazzy.yaml
index 5862bddd..40051512 100644
--- a/.jazzy.yaml
+++ b/.jazzy.yaml
@@ -3,11 +3,11 @@ sourcekitten_sourcefile: docs.json
 clean: true
 author: Timofey Solomko
 module: SWCompression
-module_version: 4.2.0
+module_version: 4.2.1
 copyright: '© 2018 Timofey Solomko'
 readme: README.md
 github_url: https://github.com/tsolomko/SWCompression
-github_file_prefix: https://github.com/tsolomko/SWCompression/tree/4.2.0
+github_file_prefix: https://github.com/tsolomko/SWCompression/tree/4.2.1
 theme: fullwidth
 
 custom_categories:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3849999e..7c410ab0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 4.2.1
+
+- Now accepts 7-Zip containers with minor format versions from 1 to 4 (previously, was only 4).
+
 ## 4.2.0
 
 - Minuimum required version of BitByteData is now 1.1.0.
diff --git a/SWCompression.podspec b/SWCompression.podspec
index f57a55f2..f94cc27a 100644
--- a/SWCompression.podspec
+++ b/SWCompression.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "SWCompression"
-  s.version      = "4.2.0"
+  s.version      = "4.2.1"
   s.summary      = "A framework with functions for working with compression, archives and containers."
   
   s.description  = "A framework with (de)compression algorithms and functions for processing various archives and containers."
diff --git a/SWCompression.xcodeproj/SWCompression.plist b/SWCompression.xcodeproj/SWCompression.plist
index 24d437c0..4a304f60 100644
--- a/SWCompression.xcodeproj/SWCompression.plist
+++ b/SWCompression.xcodeproj/SWCompression.plist
@@ -15,9 +15,9 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>4.2.0</string>
+	<string>4.2.1</string>
 	<key>CFBundleVersion</key>
-	<string>57</string>
+	<string>58</string>
 	<key>NSHumanReadableCopyright</key>
 	<string>Copyright © 2018 Timofey Solomko. All rights reserved.</string>
 </dict>
diff --git a/SWCompression.xcodeproj/TestSWCompression.plist b/SWCompression.xcodeproj/TestSWCompression.plist
index b939b417..2b8bad5e 100644
--- a/SWCompression.xcodeproj/TestSWCompression.plist
+++ b/SWCompression.xcodeproj/TestSWCompression.plist
@@ -15,8 +15,8 @@
 	<key>CFBundlePackageType</key>
 	<string>BNDL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>4.2.0</string>
+	<string>4.2.1</string>
 	<key>CFBundleVersion</key>
-	<string>57</string>
+	<string>58</string>
 </dict>
 </plist>
diff --git a/SWCompression.xcodeproj/project.pbxproj b/SWCompression.xcodeproj/project.pbxproj
index e6be36d8..53fe24f4 100644
--- a/SWCompression.xcodeproj/project.pbxproj
+++ b/SWCompression.xcodeproj/project.pbxproj
@@ -1140,7 +1140,7 @@
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
-				CURRENT_PROJECT_VERSION = 57;
+				CURRENT_PROJECT_VERSION = 58;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
@@ -1184,7 +1184,7 @@
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
-				CURRENT_PROJECT_VERSION = 57;
+				CURRENT_PROJECT_VERSION = 58;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -1212,7 +1212,7 @@
 				APPLICATION_EXTENSION_API_ONLY = YES;
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
-				DYLIB_CURRENT_VERSION = 57;
+				DYLIB_CURRENT_VERSION = 58;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				"FRAMEWORK_SEARCH_PATHS[sdk=appletvos*]" = "\"$(SRCROOT)/Carthage/Build/tvOS\"";
 				"FRAMEWORK_SEARCH_PATHS[sdk=appletvsimulator*]" = "\"$(SRCROOT)/Carthage/Build/tvOS\"";
@@ -1241,7 +1241,7 @@
 				APPLICATION_EXTENSION_API_ONLY = YES;
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
-				DYLIB_CURRENT_VERSION = 57;
+				DYLIB_CURRENT_VERSION = 58;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				"FRAMEWORK_SEARCH_PATHS[sdk=appletvos*]" = "\"$(SRCROOT)/Carthage/Build/tvOS\"";
 				"FRAMEWORK_SEARCH_PATHS[sdk=appletvsimulator*]" = "\"$(SRCROOT)/Carthage/Build/tvOS\"";
diff --git a/Sources/swcomp/main.swift b/Sources/swcomp/main.swift
index 12680ab5..2beffdbf 100644
--- a/Sources/swcomp/main.swift
+++ b/Sources/swcomp/main.swift
@@ -7,7 +7,7 @@ import Foundation
 import SWCompression
 import SwiftCLI
 
-let cli = CLI(name: "swcomp", version: "4.2.0",
+let cli = CLI(name: "swcomp", version: "4.2.1",
               description: """
                            swcomp - small command-line client for SWCompression framework.
                            Serves as an example of SWCompression usage.