diff --git a/build.sbt b/build.sbt
index 766ecd6..1fa6636 100644
--- a/build.sbt
+++ b/build.sbt
@@ -7,8 +7,8 @@ scalaVersion := "2.11.12"
 EclipseKeys.withSource := true
 
 libraryDependencies ++= Seq(
-  "com.github.spinalhdl" % "spinalhdl-core_2.11" % "1.3.0",
-  "com.github.spinalhdl" % "spinalhdl-lib_2.11" % "1.3.0"
+  "com.github.spinalhdl" % "spinalhdl-core_2.11" % "1.3.1",
+  "com.github.spinalhdl" % "spinalhdl-lib_2.11" % "1.3.1"
 )
 
 fork := true
diff --git a/src/main/scala/mylib/MyTopLevelSim.scala b/src/main/scala/mylib/MyTopLevelSim.scala
index 4ea40f6..122c04e 100644
--- a/src/main/scala/mylib/MyTopLevelSim.scala
+++ b/src/main/scala/mylib/MyTopLevelSim.scala
@@ -15,8 +15,7 @@ object MyTopLevelSim {
       dut.clockDomain.forkStimulus(period = 10)
 
       var modelState = 0
-      var idx = 0
-      while(idx < 100){
+      for(idx <- 0 to 99){
         //Drive the dut inputs with random values
         dut.io.cond0 #= Random.nextBoolean()
         dut.io.cond1 #= Random.nextBoolean()
@@ -33,8 +32,6 @@ object MyTopLevelSim {
         if(dut.io.cond0.toBoolean) {
           modelState = (modelState + 1) & 0xFF
         }
-
-        idx += 1
       }
     }
   }