diff --git a/README.md b/README.md
index daca39b..29c52f8 100644
--- a/README.md
+++ b/README.md
@@ -21,11 +21,14 @@ if (logger.isDebugEnabled) logger.debug(s"Some $expensive message!")
 A compatible logging backend is [Logback](http://logback.qos.ch), add it to your sbt build definition:
 
 ```scala
-libraryDependencies += "ch.qos.logback" % "logback-classic" % "1.2.10"
+libraryDependencies += "ch.qos.logback" % "logback-classic" % "1.5.21"
 ```
 
 If you are looking for a version compatible with Scala 2.10, check out Scala Logging 2.x.
 
+If you are looking for a version compatible with SLF4J 1.x, check out Scala Logging 3.x.
+
+
 ## Getting Scala Logging
 
 Scala Logging is published to Sonatype OSS and Maven Central:
@@ -36,7 +39,7 @@ Scala Logging is published to Sonatype OSS and Maven Central:
 sbt users may add this to their `build.sbt`:
 
 ```scala
-libraryDependencies += "com.typesafe.scala-logging" %% "scala-logging" % "3.9.4"
+libraryDependencies += "com.typesafe.scala-logging" %% "scala-logging" % "4.0.0-RC1"
 ```
 
 ## Using Scala Logging