diff --git a/Cargo.toml b/Cargo.toml
index fb2de1a4ff5..ed5af009880 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,51 +24,51 @@ bytesize = "1.0"
 cargo-platform = { path = "crates/cargo-platform", version = "0.1.1" }
 crates-io = { path = "crates/crates-io", version = "0.31" }
 crossbeam-utils = "0.7"
-crypto-hash = "0.3.1"
-curl = { version = "0.4.23", features = ["http2"] }
-curl-sys = "0.4.22"
-env_logger = "0.7.0"
+crypto-hash = "0.3.4"
+curl = { version = "0.4.25", features = ["http2"] }
+curl-sys = "0.4.25"
+env_logger = "0.7.1"
 pretty_env_logger = { version = "0.3", optional = true }
 anyhow = "1.0"
 filetime = "0.2"
-flate2 = { version = "1.0.3", features = ["zlib"] }
+flate2 = { version = "1.0.13", features = ["zlib"] }
 fs2 = "0.4"
 git2 = "0.11.0"
 git2-curl = "0.12.0"
 glob = "0.3.0"
 hex = "0.4"
 home = "0.5"
-humantime = "1.2.0"
-ignore = "0.4.7"
-lazy_static = "1.2.0"
-jobserver = "0.1.13"
-lazycell = "1.2.0"
+humantime = "1.3.0"
+ignore = "0.4.11"
+lazy_static = "1.4.0"
+jobserver = "0.1.19"
+lazycell = "1.2.1"
 libc = "0.2"
-log = "0.4.6"
+log = "0.4.8"
 libgit2-sys = "0.10.0"
-memchr = "2.1.3"
-num_cpus = "1.0"
+memchr = "2.3.0"
+num_cpus = "1.12.0"
 opener = "0.4"
-percent-encoding = "2.0"
+percent-encoding = "2.1.0"
 remove_dir_all = "0.5.2"
 rustfix = "0.5.0"
 same-file = "1"
 semver = { version = "0.9.0", features = ["serde"] }
-serde = { version = "1.0.82", features = ["derive"] }
-serde_ignored = "0.1.0"
-serde_json = { version = "1.0.30", features = ["raw_value"] }
+serde = { version = "1.0.104", features = ["derive"] }
+serde_ignored = "0.1.1"
+serde_json = { version = "1.0.44", features = ["raw_value"] }
 shell-escape = "0.1.4"
 strip-ansi-escapes = "0.1.0"
-tar = { version = "0.4.18", default-features = false }
-tempfile = "3.0"
-termcolor = "1.0"
-toml = "0.5.3"
-url = "2.0"
-walkdir = "2.2"
-clap = "2.31.2"
-unicode-width = "0.1.5"
-openssl = { version = '0.10.11', optional = true }
-im-rc = "14.0.0"
+tar = { version = "0.4.26", default-features = false }
+tempfile = "3.1.0"
+termcolor = "1.1.0"
+toml = "0.5.6"
+url = "2.1.1"
+walkdir = "2.3.1"
+clap = "2.33.0"
+unicode-width = "0.1.7"
+openssl = { version = '0.10.26', optional = true }
+im-rc = "14.1.0"
 
 # A noop dependency that changes in the Rust repository, it's a bit of a hack.
 # See the `src/tools/rustc-workspace-hack/README.md` file in `rust-lang/rust`
@@ -79,7 +79,7 @@ rustc-workspace-hack = "1.0.0"
 core-foundation = { version = "0.7.0", features = ["mac_os_10_7_support"] }
 
 [target.'cfg(windows)'.dependencies]
-miow = "0.3.1"
+miow = "0.3.3"
 fwdansi = "1"
 
 [target.'cfg(windows)'.dependencies.winapi]
diff --git a/crates/cargo-platform/Cargo.toml b/crates/cargo-platform/Cargo.toml
index 0a9a8197876..f3944d68617 100644
--- a/crates/cargo-platform/Cargo.toml
+++ b/crates/cargo-platform/Cargo.toml
@@ -10,4 +10,4 @@ documentation = "https://docs.rs/cargo-platform"
 description = "Cargo's representation of a target platform."
 
 [dependencies]
-serde = { version = "1.0.82", features = ['derive'] }
+serde = { version = "1.0.104", features = ['derive'] }
diff --git a/crates/cargo-test-support/Cargo.toml b/crates/cargo-test-support/Cargo.toml
index b1ec0600809..b26d98b0c06 100644
--- a/crates/cargo-test-support/Cargo.toml
+++ b/crates/cargo-test-support/Cargo.toml
@@ -14,8 +14,8 @@ filetime = "0.2"
 flate2 = "1.0"
 git2 = "0.11"
 glob = "0.3"
-lazy_static = "1.0"
+lazy_static = "1.4.0"
 remove_dir_all = "0.5"
 serde_json = "1.0"
-tar = { version = "0.4.18", default-features = false }
-url = "2.0"
+tar = { version = "0.4.26", default-features = false }
+url = "2.1.1"
diff --git a/crates/crates-io/Cargo.toml b/crates/crates-io/Cargo.toml
index a4f93c8c0ff..d43d6c3372d 100644
--- a/crates/crates-io/Cargo.toml
+++ b/crates/crates-io/Cargo.toml
@@ -15,9 +15,9 @@ path = "lib.rs"
 
 [dependencies]
 curl = "0.4"
-anyhow = "1.0.0"
-percent-encoding = "2.0"
+anyhow = "1.0.26"
+percent-encoding = "2.1.0"
 serde = { version = "1.0", features = ['derive'] }
 serde_derive = "1.0"
 serde_json = "1.0"
-url = "2.0"
+url = "2.1.1"
diff --git a/crates/resolver-tests/Cargo.toml b/crates/resolver-tests/Cargo.toml
index 1d98c6973cc..a068749b426 100644
--- a/crates/resolver-tests/Cargo.toml
+++ b/crates/resolver-tests/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 
 [dependencies]
 cargo = { path = "../.." }
-proptest = "0.9.1"
-lazy_static = "1.3.0"
+proptest = "0.9.5"
+lazy_static = "1.4.0"
 varisat = "0.2.1"
-atty = "0.2.11"
+atty = "0.2.14"