diff --git a/Cargo.lock b/Cargo.lock
index 81583ac9..6be48d20 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1581,9 +1581,9 @@ checksum = "a9a7ab5d64814df0fe4a4b5ead45ed6c5f181ee3ff04ba344313a6c80446c5d4"
 
 [[package]]
 name = "once_cell"
-version = "1.7.2"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af8b08b04175473088b46763e51ee54da5f9a164bc162f615b91bc179dbf15a3"
+checksum = "692fcb63b64b1758029e0a96ee63e049ce8c5948587f2f7208df04625e5f6b56"
 
 [[package]]
 name = "opaque-debug"
diff --git a/ethers-contract/Cargo.toml b/ethers-contract/Cargo.toml
index 01a93cac..f0f79b8a 100644
--- a/ethers-contract/Cargo.toml
+++ b/ethers-contract/Cargo.toml
@@ -19,7 +19,7 @@ ethers-contract-derive = { version = "0.2.2", path = "ethers-contract-derive", o
 serde = { version = "1.0.124", default-features = false }
 serde_json = { version = "1.0.64", default-features = false }
 thiserror = { version = "1.0.24", default-features = false }
-once_cell = { version = "1.7.2", default-features = false }
+once_cell = { version = "1.8.0", default-features = false }
 pin-project = {version = "1.0.7", default-features = false }
 futures-util = { version = "0.3.14", default-features = false }
 hex = { version = "0.4.3", default-features = false, features = ["std"] }
diff --git a/ethers-core/Cargo.toml b/ethers-core/Cargo.toml
index e0511a93..1b32fa79 100644
--- a/ethers-core/Cargo.toml
+++ b/ethers-core/Cargo.toml
@@ -43,7 +43,7 @@ ethers = { version = "0.2", path = "../ethers" }
 
 serde_json = { version = "1.0.64", default-features = false }
 bincode = { version = "1.3.3", default-features = false }
-once_cell = { version = "1.7.2" }
+once_cell = { version = "1.8.0" }
 
 
 [features]