diff --git a/Cargo.lock b/Cargo.lock
index 1cbaec0..75384f4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -708,7 +708,7 @@ dependencies = [
  "filecoin-proofs 0.6.4 (git+https://github.com/filecoin-project/rust-fil-proofs.git)",
  "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "once_cell 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "once_cell 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "paired 0.16.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pretty_env_logger 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1290,11 +1290,8 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "0.2.4"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "opaque-debug"
@@ -2613,7 +2610,7 @@ dependencies = [
 "checksum num_cpus 1.11.1 (registry+https://github.com/rust-lang/crates.io-index)" = "76dac5ed2a876980778b8b85f75a71b6cbf0db0b1232ee12f826bccb00d09d72"
 "checksum numtoa 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b8f8bdf33df195859076e54ab11ee78a1b208382d3a26ec40d142ffc1ecc49ef"
 "checksum ocl-core-vector 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b4072920739958adeec5abedec51af70febc58f7fff0601aaa0827c1f3c8fefd"
-"checksum once_cell 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "d584f08c2d717d5c23a6414fc2822b71c651560713e54fa7eace675f758a355e"
+"checksum once_cell 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c9192c5a4c3b5488dae8d3886ef9df6b5eb246d36323dc7a5078595a154e7771"
 "checksum opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2839e79665f131bdb5782e51f2c6c9599c133c6098982a54c794358bf432529c"
 "checksum openssl 0.10.25 (registry+https://github.com/rust-lang/crates.io-index)" = "2f372b2b53ce10fb823a337aaa674e3a7d072b957c6264d0f4ff0bd86e657449"
 "checksum openssl-probe 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "77af24da69f9d9341038eba93a073b1fdaaa1b788221b00a69bce9e762cb32de"
diff --git a/Cargo.toml b/Cargo.toml
index 8fa716b..96099c0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,7 +24,7 @@ drop_struct_macro_derive = "0.4.0"
 libc = "0.2.58"
 log = "0.4.7"
 pretty_env_logger = "0.3.0"
-once_cell = "0.2.4"
+once_cell = "1.0.1"
 paired = "0.16.0"
 
 [build-dependencies]