diff --git a/build.sbt b/build.sbt
index e447013f7c5..bcf84bbe411 100644
--- a/build.sbt
+++ b/build.sbt
@@ -163,7 +163,7 @@ lazy val firrtlSettings = Seq(
     "org.json4s" %% "json4s-native" % "4.0.6",
     "org.apache.commons" % "commons-text" % "1.10.0",
     "io.github.alexarchambault" %% "data-class" % "0.2.6",
-    "com.lihaoyi" %% "os-lib" % "0.8.1"
+    "com.lihaoyi" %% "os-lib" % "0.9.1"
   ),
   // macros for the data-class library
   libraryDependencies ++= {
@@ -241,7 +241,7 @@ lazy val chiselSettings = Seq(
   libraryDependencies ++= Seq(
     "org.scalatest" %% "scalatest" % "3.2.15" % "test",
     "org.scalatestplus" %% "scalacheck-1-15" % "3.2.11.0" % "test",
-    "com.lihaoyi" %% "upickle" % "2.0.0"
+    "com.lihaoyi" %% "upickle" % "3.1.0"
   )
 ) ++ (
   // Tests from other projects may still run concurrently
@@ -347,8 +347,8 @@ lazy val core = (project in file("core"))
   .settings(
     name := "chisel-core",
     libraryDependencies ++= Seq(
-      "com.lihaoyi" %% "upickle" % "2.0.0",
-      "com.lihaoyi" %% "os-lib" % "0.8.1"
+      "com.lihaoyi" %% "upickle" % "3.1.0",
+      "com.lihaoyi" %% "os-lib" % "0.9.1"
     ),
     scalacOptions := scalacOptions.value ++ Seq(
       "-explaintypes",
diff --git a/build.sc b/build.sc
index 7b1cc84ed91..b83641369b6 100644
--- a/build.sc
+++ b/build.sc
@@ -42,8 +42,8 @@ object v {
     "2.12.17",
     "2.13.10"
   )
-  val osLib = ivy"com.lihaoyi::os-lib:0.8.1"
-  val upickle = ivy"com.lihaoyi::upickle:2.0.0"
+  val osLib = ivy"com.lihaoyi::os-lib:0.9.1"
+  val upickle = ivy"com.lihaoyi::upickle:3.1.0"
   val macroParadise = ivy"org.scalamacros:::paradise:2.1.1"
   val scalatest = ivy"org.scalatest::scalatest:3.2.14"
   val scalacheck = ivy"org.scalatestplus::scalacheck-1-15:3.2.11.0"