diff --git a/substrate/Cargo.lock b/substrate/Cargo.lock
index 8170b096de9dcc9d452f94e06b1743b0538b6015..8985b5fb89338fa9c10cd4b7e5c16eb97263406b 100644
--- a/substrate/Cargo.lock
+++ b/substrate/Cargo.lock
@@ -6223,9 +6223,9 @@ dependencies = [
 
 [[package]]
 name = "parity-db"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7ccc4a8687027deb53d45c5434a1f1b330c9d1069a59cfe80a62aa9a1da25ae"
+checksum = "7cb5195cb862b13055cf7f7a76c55073dc73885c2a61511e322b8c1666be7332"
 dependencies = [
  "blake2-rfc",
  "crc32fast",
diff --git a/substrate/client/db/Cargo.toml b/substrate/client/db/Cargo.toml
index 19bf7ad248fe57e99bd22440ecf7bb13fc5e39d9..437431a50883f461a30d85d4be6b54ab9bb7f3a6 100644
--- a/substrate/client/db/Cargo.toml
+++ b/substrate/client/db/Cargo.toml
@@ -33,7 +33,7 @@ sc-state-db = { version = "0.10.0-dev", path = "../state-db" }
 sp-trie = { version = "4.0.0-dev", path = "../../primitives/trie" }
 sp-blockchain = { version = "4.0.0-dev", path = "../../primitives/blockchain" }
 sp-database = { version = "4.0.0-dev", path = "../../primitives/database" }
-parity-db = { version = "0.3.3", optional = true }
+parity-db = { version = "0.3.4", optional = true }
 
 [dev-dependencies]
 sp-tracing = { version = "4.0.0-dev", path = "../../primitives/tracing" }