diff --git a/.travis.yml b/.travis.yml
index dd8e4a39a7..9a810b5340 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: scala
 
 scala:
-  - 2.11.11
+  - 2.11.12
   - 2.12.4
 
 jdk:
@@ -24,7 +24,7 @@ env:
 
 script:
   - sbt ++$TRAVIS_SCALA_VERSION -Dfile.encoding=UTF8 -Dfs2.test.verbose test mimaReportBinaryIssues
-  - (test $TRAVIS_SCALA_VERSION == "2.11.11" && sbt ++$TRAVIS_SCALA_VERSION -Dfile.encoding=UTF8 -J-Xms2g -J-Xmx2g docs/tut) || test $TRAVIS_SCALA_VERSION == "2.12.4"
+  - (test $TRAVIS_SCALA_VERSION == "2.11.12" && sbt ++$TRAVIS_SCALA_VERSION -Dfile.encoding=UTF8 -J-Xms2g -J-Xmx2g docs/tut) || test $TRAVIS_SCALA_VERSION == "2.12.4"
 
 after_success:
   - test $PUBLISH == "true" && test $TRAVIS_PULL_REQUEST == "false" && test $TRAVIS_BRANCH == "series/0.10" && sbt +publish
diff --git a/build.sbt b/build.sbt
index 421ebbc1ff..e5ff011e11 100644
--- a/build.sbt
+++ b/build.sbt
@@ -48,8 +48,8 @@ lazy val commonSettings = Seq(
   scalacOptions in (Compile, console) += "-Ydelambdafy:inline",
   scalacOptions in (Test, console) := (scalacOptions in (Compile, console)).value,
   libraryDependencies ++= Seq(
-    compilerPlugin("org.spire-math" %% "kind-projector" % "0.9.5"),
-    "org.scalatest" %%% "scalatest" % "3.0.4" % "test",
+    compilerPlugin("org.spire-math" %% "kind-projector" % "0.9.6"),
+    "org.scalatest" %%% "scalatest" % "3.0.5" % "test",
     "org.scalacheck" %%% "scalacheck" % "1.13.5" % "test",
     "org.typelevel" %%% "cats-laws" % "1.0.1" % "test"
   ),
@@ -207,7 +207,7 @@ lazy val core = crossProject
   .settings(commonSettings: _*)
   .settings(
     name := "fs2-core",
-    libraryDependencies += "org.typelevel" %%% "cats-effect" % "0.8",
+    libraryDependencies += "org.typelevel" %%% "cats-effect" % "0.9",
     sourceDirectories in (Compile, scalafmt) += baseDirectory.value / "../shared/src/main/scala"
   )
   .jsSettings(commonJsSettings: _*)
diff --git a/project/build.properties b/project/build.properties
index 8b697bbb94..31334bbd3d 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.1.0
+sbt.version=1.1.1
diff --git a/project/plugins.sbt b/project/plugins.sbt
index a199e8aa5a..04d350f5f9 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,4 +1,4 @@
-addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.0.0")
+addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.0.2")
 addSbtPlugin("com.dwijnand" % "sbt-travisci" % "1.1.1")
 addSbtPlugin("com.github.tkawachi" % "sbt-doctest" % "0.7.1")
 addSbtPlugin("com.typesafe.sbt" % "sbt-osgi" % "0.9.2")
@@ -8,6 +8,6 @@ addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "0.1.18")
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "2.1")
 addSbtPlugin("org.tpolecat" % "tut-plugin" % "0.6.2")
 addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.3.3")
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.21")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.22")
 addSbtPlugin("com.lucidchart" % "sbt-scalafmt-coursier" % "1.15")
 addSbtPlugin("com.47deg"  % "sbt-microsites" % "0.7.15")