diff --git a/Cargo.lock b/Cargo.lock
index 033ebc884a3..0ee46c84290 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -537,7 +537,6 @@ dependencies = [
  "compiletest_rs",
  "derive-new",
  "lazy_static 1.4.0",
- "regex",
  "rustc-workspace-hack",
  "rustc_tools_util 0.2.0",
  "semver",