diff --git a/.jazzy.yaml b/.jazzy.yaml
index 480c9fde..2f9df4c8 100644
--- a/.jazzy.yaml
+++ b/.jazzy.yaml
@@ -3,11 +3,11 @@ clean: true
 exclude: Tests/
 author: Timofey Solomko
 module: SWCompression
-module_version: 3.4.0
+module_version: 4.0.0-dev
 copyright: '© 2017 Timofey Solomko'
 readme: README.md
 github_url: https://github.com/tsolomko/SWCompression
-github_file_prefix: https://github.com/tsolomko/SWCompression/tree/v3.4.0
+github_file_prefix: https://github.com/tsolomko/SWCompression/tree/develop
 theme: fullwidth
 
 custom_categories:
diff --git a/SWCompression.podspec b/SWCompression.podspec
index 2aba7b56..d0dedb39 100644
--- a/SWCompression.podspec
+++ b/SWCompression.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "SWCompression"
-  s.version      = "3.4.0"
+  s.version      = "4.0.0-dev"
   s.summary      = "Framework with implementations in Swift of different (de)compression algorithms"
 
   s.description  = <<-DESC
diff --git a/Sources/Service/Info.plist b/Sources/Service/Info.plist
index ebeaf784..e398c982 100644
--- a/Sources/Service/Info.plist
+++ b/Sources/Service/Info.plist
@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>3.4.0</string>
+	<string>4.0.0-dev</string>
 	<key>CFBundleVersion</key>
 	<string>$(CURRENT_PROJECT_VERSION)</string>
 	<key>NSHumanReadableCopyright</key>
diff --git a/Sources/swcomp/main.swift b/Sources/swcomp/main.swift
index 9ae7c018..9d1946cf 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: "3.4.0",
+let cli = CLI(name: "swcomp", version: "4.0.0-dev",
               description: """
                            swcomp - small command-line client for SWCompression framework.
                            Serves as an example of SWCompression usage.