diff --git a/build.sbt b/build.sbt
index 621dcb2..1c3fbce 100644
--- a/build.sbt
+++ b/build.sbt
@@ -13,9 +13,9 @@ val compilerOptions = Seq(
   "-Xfuture"
 )
 
-val circeVersion = "0.9.0"
-val iterateeVersion = "0.17.0"
-val previousCirceIterateeVersion = "0.8.0"
+val circeVersion = "0.9.3"
+val iterateeVersion = "0.18.0"
+val previousCirceIterateeVersion = "0.9.0"
 
 val baseSettings = Seq(
   scalacOptions ++= compilerOptions ++ (