diff --git a/i18n/build.sbt b/i18n/build.sbt
index bbcf912..2dbb742 100644
--- a/i18n/build.sbt
+++ b/i18n/build.sbt
@@ -12,5 +12,5 @@ scmInfo := Some(ScmInfo(browseUrl = new URL("https://github.com/albertpastrana/u
                         connection = "scm:git:git@github.com:albertpastrana/uscala.git"))
 
 libraryDependencies ++= Seq(
-  "org.specs2" %% "specs2-core" % "3.8.6" % "test"
+  Dependencies.Specs2Core
 )
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
new file mode 100644
index 0000000..a9dd9a1
--- /dev/null
+++ b/project/Dependencies.scala
@@ -0,0 +1,13 @@
+import sbt._
+
+object Dependencies {
+
+  object Versions {
+    val Specs2 = "4.0.3"
+  }
+
+  // Libraries
+  val Specs2Core = "org.specs2" %% "specs2-core" % Versions.Specs2
+  val Specs2ScalaCheck = "org.specs2" %% "specs2-scalacheck" % Versions.Specs2
+
+}
diff --git a/resources/build.sbt b/resources/build.sbt
index 89e687d..5827422 100644
--- a/resources/build.sbt
+++ b/resources/build.sbt
@@ -13,5 +13,5 @@ scmInfo := Some(ScmInfo(browseUrl = new URL("https://github.com/albertpastrana/u
                         connection = "scm:git:git@github.com:albertpastrana/uscala.git"))
 
 libraryDependencies ++= Seq(
-  "org.specs2" %% "specs2-core" % "3.8.6" % "test"
+  Dependencies.Specs2Core
 )
diff --git a/result-async/build.sbt b/result-async/build.sbt
index f804b89..85b2f02 100644
--- a/result-async/build.sbt
+++ b/result-async/build.sbt
@@ -14,6 +14,6 @@ scmInfo := Some(ScmInfo(browseUrl = new URL("https://github.com/albertpastrana/u
                         connection = "scm:git:git@github.com:albertpastrana/uscala.git"))
 
 libraryDependencies ++= Seq(
-  "org.specs2" %% "specs2-core" % "3.8.6" % "test",
-  "org.specs2" %% "specs2-scalacheck" % "3.8.6" % "test"
-)
\ No newline at end of file
+  Dependencies.Specs2Core,
+  Dependencies.Specs2ScalaCheck
+)
diff --git a/result-async/src/test/scala/uscala/concurrent/result/AsyncResultSpec.scala b/result-async/src/test/scala/uscala/concurrent/result/AsyncResultSpec.scala
index c16c741..ae5ecba 100644
--- a/result-async/src/test/scala/uscala/concurrent/result/AsyncResultSpec.scala
+++ b/result-async/src/test/scala/uscala/concurrent/result/AsyncResultSpec.scala
@@ -6,7 +6,6 @@ import org.scalacheck.{Arbitrary, Gen}
 import org.specs2.ScalaCheck
 import org.specs2.concurrent.ExecutionEnv
 import org.specs2.mutable.Specification
-import org.specs2.specification.mutable.ExecutionEnvironment
 import uscala.concurrent.result.AsyncResult.{attemptFuture, attemptSync, fromFuture, fromResult, fail => asyncFail, ok => asyncOk}
 import uscala.result.Result
 import uscala.result.Result.{Fail, Ok}
@@ -15,8 +14,7 @@ import uscala.result.specs2.ResultMatchers
 import scala.concurrent.Future
 import scala.concurrent.duration._
 
-class AsyncResultSpec extends Specification with ScalaCheck with ResultMatchers
-                         with ExecutionEnvironment { def is(implicit ee: ExecutionEnv): Unit = {
+class AsyncResultSpec(implicit ee: ExecutionEnv) extends Specification with ScalaCheck with ResultMatchers {
 
   def resultGen: Gen[Result[Int, Int]] = Gen.posNum[Int].flatMap(i => Gen.oneOf(Ok[Int](i), Fail[Int](i)))
 
@@ -299,4 +297,4 @@ class AsyncResultSpec extends Specification with ScalaCheck with ResultMatchers
       }
     }
   }
-}}
\ No newline at end of file
+}
diff --git a/result-specs2/src/test/scala/uscala/result/specs2/ResultMatchersSpec.scala b/result-specs2/src/test/scala/uscala/result/specs2/ResultMatchersSpec.scala
index 3cdbc60..4030a43 100644
--- a/result-specs2/src/test/scala/uscala/result/specs2/ResultMatchersSpec.scala
+++ b/result-specs2/src/test/scala/uscala/result/specs2/ResultMatchersSpec.scala
@@ -1,10 +1,9 @@
 package uscala.result.specs2
 
 import org.specs2.Spec
-import org.specs2.matcher.{ResultMatchers => SResultMatchers}
 import uscala.result.Result._
 
-class ResultMatchersSpec extends Spec with SResultMatchers with ResultMatchers { def is = s2"""
+class ResultMatchersSpec extends Spec with ResultMatchers { def is = s2"""
  The ResultMatchers trait provides matchers to check Result instances
 
   beOk checks if an element is Ok(_)
@@ -14,7 +13,7 @@ class ResultMatchersSpec extends Spec with SResultMatchers with ResultMatchers {
   ${ Ok(1) must beOk(===(1)) }
   ${ Ok(Seq(1)) must beOk(===(Seq(1))) }
   ${ Ok(1) must beOk.like { case i => i must be_>(0) } }
-  ${ (Ok(1) must beOk.like { case i => i must be_<(0) }) returns "'Ok(1)' is Ok but 1 is not less than 0" }
+  ${ (Ok(1) must beOk.like { case i => i must be_<(0) }) returns "1 is not less than 0" }
   beFail checks if an element is Fail(_)
   ${ Fail(1) must beFail(1) }
   ${ Fail(1) must beFail(===(1)) }
diff --git a/result/build.sbt b/result/build.sbt
index 203eaaf..15580e9 100644
--- a/result/build.sbt
+++ b/result/build.sbt
@@ -13,6 +13,6 @@ scmInfo := Some(ScmInfo(browseUrl = new URL("https://github.com/albertpastrana/u
                         connection = "scm:git:git@github.com:albertpastrana/uscala.git"))
 
 libraryDependencies ++= Seq(
-  "org.specs2" %% "specs2-core" % "3.8.6" % "test",
-  "org.specs2" %% "specs2-scalacheck" % "3.8.6" % "test"
-)
\ No newline at end of file
+  Dependencies.Specs2Core,
+  Dependencies.Specs2ScalaCheck
+)
diff --git a/retry/build.sbt b/retry/build.sbt
index 49e399f..408356b 100644
--- a/retry/build.sbt
+++ b/retry/build.sbt
@@ -13,6 +13,6 @@ scmInfo := Some(ScmInfo(browseUrl = new URL("https://github.com/albertpastrana/u
                         connection = "scm:git:git@github.com:albertpastrana/uscala.git"))
 
 libraryDependencies ++= Seq(
-  "org.specs2" %% "specs2-core" % "3.8.6" % "test",
-  "org.specs2" %% "specs2-scalacheck" % "3.8.6" % "test"
+  Dependencies.Specs2Core,
+  Dependencies.Specs2ScalaCheck
 )
diff --git a/timeout/build.sbt b/timeout/build.sbt
index 13ad3f8..3fb9a0a 100644
--- a/timeout/build.sbt
+++ b/timeout/build.sbt
@@ -13,5 +13,5 @@ scmInfo := Some(ScmInfo(browseUrl = new URL("https://github.com/albertpastrana/u
                         connection = "scm:git:git@github.com:albertpastrana/uscala.git"))
 
 libraryDependencies ++= Seq(
-  "org.specs2" %% "specs2-core" % "3.8.6" % "test"
+  Dependencies.Specs2Core
 )
diff --git a/url/build.sbt b/url/build.sbt
index deaf51d..bea910a 100644
--- a/url/build.sbt
+++ b/url/build.sbt
@@ -13,6 +13,6 @@ scmInfo := Some(ScmInfo(browseUrl = new URL("https://github.com/albertpastrana/u
                         connection = "scm:git:git@github.com:albertpastrana/uscala.git"))
 
 libraryDependencies ++= Seq(
-  "org.specs2" %% "specs2-core" % "3.8.6" % "test",
-  "org.specs2" %% "specs2-scalacheck" % "3.8.6" % "test"
+  Dependencies.Specs2Core,
+  Dependencies.Specs2ScalaCheck
 )