diff --git a/rust/Cargo.lock b/rust/Cargo.lock
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -210,22 +210,12 @@
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.4.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b153fe7cbef478c567df0f972e02e6d736db11affe43dfc9c56a9374d1adfb87"
-dependencies = [
- "crossbeam-utils 0.7.2",
- "maybe-uninit",
-]
-
-[[package]]
-name = "crossbeam-channel"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e54ea8bc3fb1ee042f5aace6e3c6e025d3874866da222930f70ce62aceba0bfa"
 dependencies = [
  "cfg-if 1.0.0",
- "crossbeam-utils 0.8.1",
+ "crossbeam-utils",
 ]
 
 [[package]]
@@ -236,7 +226,7 @@
 dependencies = [
  "cfg-if 1.0.0",
  "crossbeam-epoch",
- "crossbeam-utils 0.8.1",
+ "crossbeam-utils",
 ]
 
 [[package]]
@@ -247,7 +237,7 @@
 dependencies = [
  "cfg-if 1.0.0",
  "const_fn",
- "crossbeam-utils 0.8.1",
+ "crossbeam-utils",
  "lazy_static",
  "memoffset",
  "scopeguard",
@@ -255,17 +245,6 @@
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.7.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
-dependencies = [
- "autocfg",
- "cfg-if 0.1.10",
- "lazy_static",
-]
-
-[[package]]
-name = "crossbeam-utils"
 version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "02d96d1e189ef58269ebe5b97953da3274d83a93af647c2ddd6f9dab28cedb8d"
@@ -340,25 +319,12 @@
 
 [[package]]
 name = "env_logger"
-version = "0.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "44533bbbb3bb3c1fa17d9f2e4e38bbbaf8396ba82193c4cb1b6445d711445d36"
-dependencies = [
- "atty",
- "humantime 1.3.0",
- "log",
- "regex",
- "termcolor",
-]
-
-[[package]]
-name = "env_logger"
 version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b2cf0344971ee6c64c31be0d530793fba457d322dfec2810c453d0ef228f9c3"
 dependencies = [
  "atty",
- "humantime 2.1.0",
+ "humantime",
  "log",
  "regex",
  "termcolor",
@@ -477,7 +443,7 @@
  "byteorder",
  "bytes-cast",
  "clap",
- "crossbeam-channel 0.5.2",
+ "crossbeam-channel",
  "derive_more",
  "flate2",
  "format-bytes",
@@ -509,8 +475,8 @@
 version = "0.1.0"
 dependencies = [
  "cpython",
- "crossbeam-channel 0.4.4",
- "env_logger 0.7.1",
+ "crossbeam-channel",
+ "env_logger",
  "hg-core",
  "libc",
  "log",
@@ -529,15 +495,6 @@
 
 [[package]]
 name = "humantime"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df004cfca50ef23c36850aaaa59ad52cc70d0e90243c3c7737a4dd32dc7a3c4f"
-dependencies = [
- "quick-error",
-]
-
-[[package]]
-name = "humantime"
 version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
@@ -631,12 +588,6 @@
 ]
 
 [[package]]
-name = "maybe-uninit"
-version = "2.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
-
-[[package]]
 name = "memchr"
 version = "2.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -788,12 +739,6 @@
 ]
 
 [[package]]
-name = "quick-error"
-version = "1.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
-
-[[package]]
 name = "quote"
 version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -919,9 +864,9 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d78120e2c850279833f1dd3582f730c4ab53ed95aeaaaa862a2a5c71b1656d8e"
 dependencies = [
- "crossbeam-channel 0.5.2",
+ "crossbeam-channel",
  "crossbeam-deque",
- "crossbeam-utils 0.8.1",
+ "crossbeam-utils",
  "lazy_static",
  "num_cpus",
 ]
@@ -969,7 +914,7 @@
  "chrono",
  "clap",
  "derive_more",
- "env_logger 0.9.0",
+ "env_logger",
  "format-bytes",
  "hg-core",
  "home",
diff --git a/rust/hg-cpython/Cargo.toml b/rust/hg-cpython/Cargo.toml
--- a/rust/hg-cpython/Cargo.toml
+++ b/rust/hg-cpython/Cargo.toml
@@ -10,10 +10,10 @@
 
 [dependencies]
 cpython = { version = "0.7.0", features = ["extension-module"] }
-crossbeam-channel = "0.4"
+crossbeam-channel = "0.5.2"
 hg-core = { path = "../hg-core"}
-libc = "0.2"
-log = "0.4.8"
-env_logger = "0.7.1"
+libc = "0.2.119"
+log = "0.4.14"
+env_logger = "0.9.0"
 stable_deref_trait = "1.2.0"
 vcsgraph = "0.2.0"