diff --git a/docs/Installation.md b/docs/Installation.md
index 3c7cdafe5d..8d6ec83071 100644
--- a/docs/Installation.md
+++ b/docs/Installation.md
@@ -68,7 +68,7 @@ Here are the important dependencies in case you are not running on a supported O
 Download the Arbitrum Monorepo from source:
 
 ```bash
-git clone -b v0.4.0 --depth=1 -c advice.detachedHead=false https://github.com/offchainlabs/arbitrum.git
+git clone -b v0.4.1 --depth=1 -c advice.detachedHead=false https://github.com/offchainlabs/arbitrum.git
 cd arbitrum
 yarn
 yarn build
diff --git a/packages/arb-avm-cpp/go.mod b/packages/arb-avm-cpp/go.mod
index e0aa7ba762..1b36a93d57 100644
--- a/packages/arb-avm-cpp/go.mod
+++ b/packages/arb-avm-cpp/go.mod
@@ -2,6 +2,6 @@ module github.com/offchainlabs/arbitrum/packages/arb-avm-cpp
 
 go 1.12
 
-require github.com/offchainlabs/arbitrum/packages/arb-util v0.4.0
+require github.com/offchainlabs/arbitrum/packages/arb-util v0.4.1
 
 replace github.com/offchainlabs/arbitrum/packages/arb-util => ../arb-util
diff --git a/packages/arb-avm-go/go.mod b/packages/arb-avm-go/go.mod
index daea24f8e9..863e33ad80 100644
--- a/packages/arb-avm-go/go.mod
+++ b/packages/arb-avm-go/go.mod
@@ -5,7 +5,7 @@ go 1.12
 require (
 	github.com/dgraph-io/badger v1.6.0
 	github.com/ethereum/go-ethereum v1.9.8
-	github.com/offchainlabs/arbitrum/packages/arb-util v0.4.0
+	github.com/offchainlabs/arbitrum/packages/arb-util v0.4.1
 )
 
 replace github.com/offchainlabs/arbitrum/packages/arb-util => ../arb-util
diff --git a/packages/arb-provider-go/go.mod b/packages/arb-provider-go/go.mod
index 0584d59c4d..5d15bea9cb 100644
--- a/packages/arb-provider-go/go.mod
+++ b/packages/arb-provider-go/go.mod
@@ -5,8 +5,8 @@ go 1.12
 require (
 	github.com/ethereum/go-ethereum v1.9.8
 	github.com/gorilla/rpc v1.2.0
-	github.com/offchainlabs/arbitrum/packages/arb-util v0.4.0
-	github.com/offchainlabs/arbitrum/packages/arb-validator v0.4.0
+	github.com/offchainlabs/arbitrum/packages/arb-util v0.4.1
+	github.com/offchainlabs/arbitrum/packages/arb-validator v0.4.1
 )
 
 replace github.com/offchainlabs/arbitrum/packages/arb-validator => ../arb-validator
diff --git a/packages/arb-validator/go.mod b/packages/arb-validator/go.mod
index f1e6507de1..b07efd582d 100644
--- a/packages/arb-validator/go.mod
+++ b/packages/arb-validator/go.mod
@@ -21,9 +21,9 @@ require (
 	github.com/huin/goupnp v1.0.0 // indirect
 	github.com/mattn/go-colorable v0.1.2 // indirect
 	github.com/mattn/go-isatty v0.0.9 // indirect
-	github.com/offchainlabs/arbitrum/packages/arb-avm-cpp v0.4.0
-	github.com/offchainlabs/arbitrum/packages/arb-avm-go v0.4.0
-	github.com/offchainlabs/arbitrum/packages/arb-util v0.4.0
+	github.com/offchainlabs/arbitrum/packages/arb-avm-cpp v0.4.1
+	github.com/offchainlabs/arbitrum/packages/arb-avm-go v0.4.1
+	github.com/offchainlabs/arbitrum/packages/arb-util v0.4.1
 	github.com/pborman/uuid v1.2.0 // indirect
 	github.com/pkg/errors v0.8.1
 	github.com/prometheus/tsdb v0.10.0 // indirect