diff --git a/build.sbt b/build.sbt
index 9df3be1..65c4be9 100644
--- a/build.sbt
+++ b/build.sbt
@@ -21,7 +21,7 @@ libraryDependencies ++= Seq(
   "com.lihaoyi" %% "sourcecode"  % "0.1.5",
   "com.lihaoyi" %% "utest"       % "0.6.6" % Test,
   "org.scalaz"  %% "scalaz-core" % "7.2.27",
-  "org.scalaz"  %% "scalaz-zio"  % "0.6.3",
+  "org.scalaz"  %% "scalaz-zio"  % "1.0-RC4",
   "org.slf4j"   % "slf4j-api"    % "1.7.26",
   compilerPlugin("com.github.ghik" %% "silencer-plugin" % "1.3.2"),
   "com.github.ghik" %% "silencer-lib" % "1.3.2" % Provided
diff --git a/src/main/scala/console.scala b/src/main/scala/console.scala
deleted file mode 100644
index 92ae091..0000000
--- a/src/main/scala/console.scala
+++ /dev/null
@@ -1,17 +0,0 @@
-package nequi.zio.logger
-
-import scalaz.Show
-import scalaz.zio.{ console, IO }
-
-trait ConsoleLogger {
-  implicit lazy val logger: Logger = new Logger {
-    private def log[A](level: String)(a: A)(implicit S: Show[A]): IO[Throwable, Unit] =
-      console.putStrLn(s"[${level}] ${S.shows(a)}")
-
-    def trace[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit] = log("TRACE")(a)
-    def debug[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit] = log("DEBUG")(a)
-    def info[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit]  = log("INFO")(a)
-    def warn[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit]  = log("WARN")(a)
-    def error[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit] = log("ERROR")(a)
-  }
-}
diff --git a/src/main/scala/logger.scala b/src/main/scala/logger.scala
index 40bd411..97b6176 100644
--- a/src/main/scala/logger.scala
+++ b/src/main/scala/logger.scala
@@ -4,9 +4,9 @@ import scalaz.Show
 import scalaz.zio.IO
 
 trait Logger {
-  def trace[A: Show](a: A): IO[Throwable, Unit]
-  def debug[A: Show](a: A): IO[Throwable, Unit]
-  def info[A: Show](a: A): IO[Throwable, Unit]
-  def warn[A: Show](a: A): IO[Throwable, Unit]
-  def error[A: Show](a: A): IO[Throwable, Unit]
+  def trace[A: Show](a: A): IO[Nothing, Unit]
+  def debug[A: Show](a: A): IO[Nothing, Unit]
+  def info[A: Show](a: A): IO[Nothing, Unit]
+  def warn[A: Show](a: A): IO[Nothing, Unit]
+  def error[A: Show](a: A): IO[Nothing, Unit]
 }
diff --git a/src/main/scala/queue.scala b/src/main/scala/queue.scala
index 94a0eb1..01749cd 100644
--- a/src/main/scala/queue.scala
+++ b/src/main/scala/queue.scala
@@ -16,13 +16,13 @@ trait QueueLogger {
   val queue = new ArrayDeque[(Level, String)]
 
   implicit lazy val logger: Logger = new Logger {
-    def trace[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit] =
-      IO.syncThrowable(queue.offer((Trace, S.shows(a)))).void
-    def debug[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit] =
-      IO.syncThrowable(queue.offer((Debug, S.shows(a)))).void
-    def info[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit] = IO.syncThrowable(queue.offer((Info, S.shows(a)))).void
-    def warn[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit] = IO.syncThrowable(queue.offer((Warn, S.shows(a)))).void
-    def error[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit] =
-      IO.syncThrowable(queue.offer((Error, S.shows(a)))).void
+    def trace[A](a: A)(implicit S: Show[A]): IO[Nothing, Unit] =
+      IO.effectTotal(queue.offer((Trace, S.shows(a)))).unit
+    def debug[A](a: A)(implicit S: Show[A]): IO[Nothing, Unit] =
+      IO.effectTotal(queue.offer((Debug, S.shows(a)))).unit
+    def info[A](a: A)(implicit S: Show[A]): IO[Nothing, Unit] = IO.effectTotal(queue.offer((Info, S.shows(a)))).unit
+    def warn[A](a: A)(implicit S: Show[A]): IO[Nothing, Unit] = IO.effectTotal(queue.offer((Warn, S.shows(a)))).unit
+    def error[A](a: A)(implicit S: Show[A]): IO[Nothing, Unit] =
+      IO.effectTotal(queue.offer((Error, S.shows(a)))).unit
   }
 }
diff --git a/src/main/scala/slf4j.scala b/src/main/scala/slf4j.scala
index 0db8fc3..ea193a1 100644
--- a/src/main/scala/slf4j.scala
+++ b/src/main/scala/slf4j.scala
@@ -17,10 +17,10 @@ trait Slf4jLogger {
   implicit lazy val logger: Logger with InnerLogger[slf4j.Logger] = new Logger with InnerLogger[slf4j.Logger] {
     val inner: slf4j.Logger = slf4j.LoggerFactory.getLogger(clazzName)
 
-    def trace[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit] = IO.syncThrowable(inner.trace(S.shows(a)))
-    def debug[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit] = IO.syncThrowable(inner.debug(S.shows(a)))
-    def info[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit]  = IO.syncThrowable(inner.info(S.shows(a)))
-    def warn[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit]  = IO.syncThrowable(inner.warn(S.shows(a)))
-    def error[A](a: A)(implicit S: Show[A]): IO[Throwable, Unit] = IO.syncThrowable(inner.error(S.shows(a)))
+    def trace[A](a: A)(implicit S: Show[A]): IO[Nothing, Unit] = IO.effectTotal(inner.trace(S.shows(a)))
+    def debug[A](a: A)(implicit S: Show[A]): IO[Nothing, Unit] = IO.effectTotal(inner.debug(S.shows(a)))
+    def info[A](a: A)(implicit S: Show[A]): IO[Nothing, Unit]  = IO.effectTotal(inner.info(S.shows(a)))
+    def warn[A](a: A)(implicit S: Show[A]): IO[Nothing, Unit]  = IO.effectTotal(inner.warn(S.shows(a)))
+    def error[A](a: A)(implicit S: Show[A]): IO[Nothing, Unit] = IO.effectTotal(inner.error(S.shows(a)))
   }
 }