diff --git a/Cargo.lock b/Cargo.lock
index b11af51..d16eb5c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4519,7 +4519,7 @@ dependencies = [
  "pretty_assertions",
  "pwasm-utils 0.16.0",
  "rand 0.7.3",
- "rand_pcg",
+ "rand_pcg 0.3.1",
  "serde",
  "sp-core",
  "sp-io",
@@ -6028,7 +6028,7 @@ dependencies = [
  "rand_chacha 0.2.2",
  "rand_core 0.5.1",
  "rand_hc 0.2.0",
- "rand_pcg",
+ "rand_pcg 0.2.1",
 ]
 
 [[package]]
@@ -6132,6 +6132,15 @@ dependencies = [
  "rand_core 0.5.1",
 ]
 
+[[package]]
+name = "rand_pcg"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59cad018caf63deb318e5a4586d99a24424a364f40f1e5778c29aca23f4fc73e"
+dependencies = [
+ "rand_core 0.6.2",
+]
+
 [[package]]
 name = "raw-cpuid"
 version = "8.1.2"
diff --git a/frame/contracts/Cargo.toml b/frame/contracts/Cargo.toml
index c5ba615..2b5bd2f 100644
--- a/frame/contracts/Cargo.toml
+++ b/frame/contracts/Cargo.toml
@@ -34,7 +34,7 @@ wasmi-validation = { version = "0.3.0", default-features = false }
 
 # Only used in benchmarking to generate random contract code
 rand = { version = "0.7.0", optional = true, default-features = false }
-rand_pcg = { version = "0.2.1", optional = true }
+rand_pcg = { version = "0.3.1", optional = true }
 
 [dev-dependencies]
 assert_matches = "1.3.0"