diff --git a/Cargo.toml b/Cargo.toml
index cad48f4..5c08e9f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -38,34 +38,17 @@ repository = "https://github.com/Amanieu/parking_lot"
 rustdoc-args = ["--generate-link-to-definition"]
 
 [features]
-deadlock_detection = [
-    "petgraph",
-    "thread-id",
-    "backtrace",
-]
 nightly = []
 
 [lib]
 name = "parking_lot_core"
 path = "src/lib.rs"
 
-[dependencies.backtrace]
-version = "0.3.60"
-optional = true
-
 [dependencies.cfg-if]
 version = "1.0.0"
 
-[dependencies.petgraph]
-version = "0.6.0"
-optional = true
-
 [dependencies.smallvec]
 version = "1.6.1"
 
-[dependencies.thread-id]
-version = "4.0.0"
-optional = true
-
 [target."cfg(unix)".dependencies.libc]
 version = "0.2.95"