diff --git a/Cargo.toml b/Cargo.toml
index d5a15a223ae..840e3c5974d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,7 +31,7 @@ env_logger = "0.7.0"
 pretty_env_logger = { version = "0.4", optional = true }
 anyhow = "1.0"
 filetime = "0.2"
-flate2 = { version = "1.0.3", features = ["zlib"] }
+flate2 = { version = "1.0.3", default-features = false, features = ["zlib"] }
 fs2 = "0.4"
 git2 = "0.13.0"
 git2-curl = "0.14.0"
diff --git a/crates/cargo-test-support/Cargo.toml b/crates/cargo-test-support/Cargo.toml
index 5363097b493..e891f662eec 100644
--- a/crates/cargo-test-support/Cargo.toml
+++ b/crates/cargo-test-support/Cargo.toml
@@ -11,7 +11,7 @@ doctest = false
 cargo = { path = "../.." }
 cargo-test-macro = { path = "../cargo-test-macro" }
 filetime = "0.2"
-flate2 = "1.0"
+flate2 = { version = "1.0", default-features = false, features = ["zlib"] }
 git2 = "0.13"
 glob = "0.3"
 lazy_static = "1.0"