diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # CHANGELOG
 
+## Version 0.4.4
+
+* Remove unused packages.
+  [#8](https://github.com/kazu-yamamoto/crypton-connection/pull/8)
+
 ## Version 0.4.3
 
 * Creating the `Internal` module and export the `ConnectionContext` constructor.
diff --git a/crypton-connection.cabal b/crypton-connection.cabal
--- a/crypton-connection.cabal
+++ b/crypton-connection.cabal
@@ -1,5 +1,5 @@
 Name:                crypton-connection
-Version:             0.4.3
+Version:             0.4.4
 Description:
     Simple network library for all your connection needs.
     .
@@ -24,17 +24,14 @@
 Library
   Default-Language:  Haskell2010
   Build-Depends:     base >= 3 && < 5
-                   , basement
                    , bytestring
                    , containers
                    , data-default
                    , network >= 2.6.3
                    , tls >= 1.7 && < 2.2
                    , socks >= 0.6
-                   , crypton-x509 >= 1.5
                    , crypton-x509-store >= 1.5
                    , crypton-x509-system >= 1.5
-                   , crypton-x509-validation >= 1.5
   Exposed-modules:   Network.Connection
                      Network.Connection.Internal
   Other-modules:     Network.Connection.Types