diff --git a/Cargo.lock b/Cargo.lock
index fcfd23f2dae5f..3603dbe1d0c6d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -895,9 +895,9 @@ dependencies = [
 
 [[package]]
 name = "curl"
-version = "0.4.31"
+version = "0.4.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9447ad28eee2a5cfb031c329d46bef77487244fff6a724b378885b8691a35f78"
+checksum = "e268162af1a5fe89917ae25ba3b0a77c8da752bdc58e7dbb4f15b91fbd33756e"
 dependencies = [
  "curl-sys",
  "libc",
@@ -910,9 +910,9 @@ dependencies = [
 
 [[package]]
 name = "curl-sys"
-version = "0.4.34+curl-7.71.1"
+version = "0.4.39+curl-7.74.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ad4eff0be6985b7e709f64b5a541f700e9ad1407190a29f4884319eb663ed1d6"
+checksum = "07a8ce861e7b68a0b394e814d7ee9f1b2750ff8bd10372c6ad3bacc10e86f874"
 dependencies = [
  "cc",
  "libc",
@@ -1330,9 +1330,9 @@ dependencies = [
 
 [[package]]
 name = "git2"
-version = "0.13.12"
+version = "0.13.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca6f1a0238d7f8f8fd5ee642f4ebac4dbc03e03d1f78fbe7a3ede35dcf7e2224"
+checksum = "186dd99cc77576e58344ad614fa9bb27bad9d048f85de3ca850c1f4e8b048260"
 dependencies = [
  "bitflags",
  "libc",
@@ -1345,9 +1345,9 @@ dependencies = [
 
 [[package]]
 name = "git2-curl"
-version = "0.14.0"
+version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "502d532a2d06184beb3bc869d4d90236e60934e3382c921b203fa3c33e212bd7"
+checksum = "883539cb0ea94bab3f8371a98cd8e937bbe9ee7c044499184aa4c17deb643a50"
 dependencies = [
  "curl",
  "git2",
@@ -1759,9 +1759,9 @@ dependencies = [
 
 [[package]]
 name = "libgit2-sys"
-version = "0.12.14+1.1.0"
+version = "0.12.16+1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f25af58e6495f7caf2919d08f212de550cfa3ed2f5e744988938ea292b9f549"
+checksum = "9f91b2f931ee975a98155195be8cd82d02e8e029d7d793d2bac1b8181ac97020"
 dependencies = [
  "cc",
  "libc",
@@ -3435,6 +3435,7 @@ dependencies = [
  "byteorder",
  "crossbeam-utils 0.7.2",
  "libc",
+ "libz-sys",
  "proc-macro2",
  "quote",
  "serde",
diff --git a/src/tools/cargo b/src/tools/cargo
index a3c2627fbc2f5..75d5d8cffe346 160000
--- a/src/tools/cargo
+++ b/src/tools/cargo
@@ -1 +1 @@
-Subproject commit a3c2627fbc2f5391c65ba45ab53b81bf71fa323c
+Subproject commit 75d5d8cffe3464631f82dcd3c470b78dc1dda8bb
diff --git a/src/tools/rustc-workspace-hack/Cargo.toml b/src/tools/rustc-workspace-hack/Cargo.toml
index 11b175f9e80ed..1cde0e25cedca 100644
--- a/src/tools/rustc-workspace-hack/Cargo.toml
+++ b/src/tools/rustc-workspace-hack/Cargo.toml
@@ -65,6 +65,8 @@ byteorder = { version = "1", features = ['default', 'std'] }
 curl-sys = { version = "0.4.13", features = ["http2", "libnghttp2-sys"], optional = true }
 crossbeam-utils = { version = "0.7.2", features = ["nightly"] }
 libc = { version = "0.2.79", features = ["align"] }
+# Ensure default features of libz-sys, which are disabled in some scenarios.
+libz-sys = { version = "1.1.2" }
 proc-macro2 = { version = "1", features = ["default"] }
 quote = { version = "1", features = ["default"] }
 serde = { version = "1.0.82", features = ['derive'] }