diff --git a/bench/Cargo.toml b/bench/Cargo.toml
index ea95a24f4c..b4a4cc5389 100644
--- a/bench/Cargo.toml
+++ b/bench/Cargo.toml
@@ -12,7 +12,7 @@ futures-util = "0.3.11"
 hdrhistogram = { version = "7.2", default-features = false }
 quinn = { path = "../quinn" }
 rcgen = "0.8"
-rustls = { version = "0.20.0", features = ["quic"] }
+rustls = { version = "0.20.0", default-features = false, features = ["quic"] }
 structopt = "0.3"
 tokio = { version = "1.0.1", features = ["rt"] }
 tracing = "0.1.10"
diff --git a/perf/Cargo.toml b/perf/Cargo.toml
index 1f058ab01c..b4d39096fb 100644
--- a/perf/Cargo.toml
+++ b/perf/Cargo.toml
@@ -16,7 +16,7 @@ futures-util = "0.3.11"
 hdrhistogram = { version = "7.2", default-features = false }
 quinn = { path = "../quinn" }
 rcgen = "0.8"
-rustls = { version = "0.20", features = ["dangerous_configuration", "quic"] }
+rustls = { version = "0.20", default-features = false, features = ["dangerous_configuration", "quic"] }
 rustls-pemfile = "0.2.1"
 serde = { version = "1.0", features = ["derive"], optional = true  }
 serde_json = { version = "1.0", optional = true }
diff --git a/quinn-proto/Cargo.toml b/quinn-proto/Cargo.toml
index 22e9113892..dfe4f6fcc0 100644
--- a/quinn-proto/Cargo.toml
+++ b/quinn-proto/Cargo.toml
@@ -30,7 +30,7 @@ ring = { version = "0.16.7", optional = true }
 # If rustls gets updated to a new version which contains
 # https://github.com/ctz/rustls/commit/7117a805e0104705da50259357d8effa7d599e37
 # the custom cipher list in `quinn-proto/src/crypto/rustls.rs` can be removed.
-rustls = { version = "0.20.0", features = ["quic"], optional = true }
+rustls = { version = "0.20.0", default-features = false, features = ["quic"], optional = true }
 rustls-native-certs = { version = "0.6", optional = true }
 rustls-pemfile = { version = "0.2.1", optional = true }
 slab = "0.4"
diff --git a/quinn/Cargo.toml b/quinn/Cargo.toml
index de6dabb63a..686656b31d 100644
--- a/quinn/Cargo.toml
+++ b/quinn/Cargo.toml
@@ -31,7 +31,7 @@ futures-util = { version = "0.3.11", default-features = false, features = ["io"]
 futures-channel = "0.3.11"
 fxhash = "0.2.1"
 proto = { package = "quinn-proto", path = "../quinn-proto", version = "0.7", default-features = false }
-rustls = { version = "0.20", features = ["quic"], optional = true }
+rustls = { version = "0.20", default-features = false, features = ["quic"], optional = true }
 thiserror = "1.0.21"
 tracing = "0.1.10"
 tokio = { version = "1.0.1", features = ["rt", "time"] }