diff --git a/README.md b/README.md
index 383314e..d379a1d 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,6 @@
 [![MIT license](https://img.shields.io/crates/l/serial_test.svg)](./LICENSE)
 [![Build Status](https://github.com/palfrey/serial_test/workflows/Continuous%20integration/badge.svg?branch=main)](https://github.com/palfrey/serial_test/actions)
 [![MSRV: 1.39.0](https://flat.badgen.net/badge/MSRV/1.39.0/purple)](https://blog.rust-lang.org/2019/11/07/Rust-1.39.0.html)
-[![dependency status](https://deps.rs/repo/github/palfrey/serial_test/status.svg)](https://deps.rs/repo/github/palfrey/serial_test)
 
 `serial_test` allows for the creation of serialised Rust tests using the `serial` attribute
 e.g.
diff --git a/serial_test/Cargo.toml b/serial_test/Cargo.toml
index 11e43b3..a4c598a 100644
--- a/serial_test/Cargo.toml
+++ b/serial_test/Cargo.toml
@@ -12,7 +12,7 @@ keywords = ["sequential"]
 
 [dependencies]
 lazy_static = "1.2"
-parking_lot = ">= 0.10, < 0.12"
+parking_lot = ">= 0.10, < 0.12" # Can't upgrade or we break 1.39
 serial_test_derive = { version = "~0.5.1", path = "../serial_test_derive" }
 fslock = {version = "0.2", optional = true}
 document-features = {version = "0.2", optional=true}