diff --git a/generators/firechip/src/main/scala/BridgeBinders.scala b/generators/firechip/src/main/scala/BridgeBinders.scala
index f42a1adf..8a4d0a69 100644
--- a/generators/firechip/src/main/scala/BridgeBinders.scala
+++ b/generators/firechip/src/main/scala/BridgeBinders.scala
@@ -39,10 +39,20 @@ trait Unsupported {
   require(false, "We do not support this IOCell type")
 }
 
-class FireSimAnalogIOCell extends RawModule with AnalogIOCell with Unsupported
-class FireSimDigitalGPIOCell extends RawModule with DigitalGPIOCell with Unsupported
-class FireSimDigitalInIOCell extends RawModule with DigitalInIOCell { io.i := io.pad }
-class FireSimDigitalOutIOCell extends RawModule with DigitalOutIOCell { io.pad := io.o }
+class FireSimAnalogIOCell extends RawModule with AnalogIOCell with Unsupported {
+  val io = IO(new AnalogIOCellBundle)
+}
+class FireSimDigitalGPIOCell extends RawModule with DigitalGPIOCell with Unsupported {
+  val io = IO(new DigitalGPIOCellBundle)
+}
+class FireSimDigitalInIOCell extends RawModule with DigitalInIOCell {
+  val io = IO(new DigitalInIOCellBundle)
+  io.i := io.pad
+}
+class FireSimDigitalOutIOCell extends RawModule with DigitalOutIOCell {
+  val io = IO(new DigitalOutIOCellBundle)
+  io.pad := io.o
+}
 
 case class FireSimIOCellParams() extends IOCellTypeParams {
   def analog() = Module(new FireSimAnalogIOCell)
diff --git a/tools/barstools b/tools/barstools
index ba681676..31590a79 160000
--- a/tools/barstools
+++ b/tools/barstools
@@ -1 +1 @@
-Subproject commit ba681676f338af158023c99b4c802009aa0b601b
+Subproject commit 31590a7948db47fd16beed266c4833579acc305b