diff --git a/Cargo.lock b/Cargo.lock
index ffcc86a70f..6c152769ac 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1660,9 +1660,9 @@ dependencies = [
 
 [[package]]
 name = "num-bigint"
-version = "0.3.1"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e9a41747ae4633fce5adffb4d2e81ffc5e89593cb19917f8fb2cc5ff76507bf"
+checksum = "4e0d047c1062aa51e256408c560894e5251f08925980e53cf1aa5bd00eec6512"
 dependencies = [
  "autocfg",
  "num-integer",
diff --git a/asg/Cargo.toml b/asg/Cargo.toml
index 770c031200..59991f521e 100644
--- a/asg/Cargo.toml
+++ b/asg/Cargo.toml
@@ -38,7 +38,7 @@ version = "1.2.3"
 path = "../parser"
 
 [dependencies.num-bigint]
-version = "0.3"
+version = "0.4"
 
 [dependencies.typed-arena]
 version = "2.0"
diff --git a/compiler/Cargo.toml b/compiler/Cargo.toml
index dab18d38a9..3f65f95a8e 100644
--- a/compiler/Cargo.toml
+++ b/compiler/Cargo.toml
@@ -101,7 +101,7 @@ version = "1.0"
 version = "0.1"
 
 [dev-dependencies.num-bigint]
-version = "0.3"
+version = "0.4"
 
 [dev-dependencies.rand_core]
 version = "0.6.2"
diff --git a/synthesizer/Cargo.toml b/synthesizer/Cargo.toml
index 6524788cfd..8e27c6f4f2 100644
--- a/synthesizer/Cargo.toml
+++ b/synthesizer/Cargo.toml
@@ -34,7 +34,7 @@ version = "0.2.0"
 default-features = false
 
 [dependencies.num-bigint]
-version = "0.3"
+version = "0.4"
 
 [dependencies.serde]
 version = "1.0"