Index: maturin/Cargo.toml
===================================================================
--- maturin.orig/Cargo.toml
+++ maturin/Cargo.toml
@@ -61,7 +61,7 @@ once_cell = "1.7.2"
 rustc_version = "0.4.0"
 semver = "1.0.13"
 target-lexicon = "0.12.8"
-indexmap = "1.9.3"
+indexmap = "2"
 pyproject-toml = "0.7.0"
 python-pkginfo = "0.5.5"
 textwrap = "0.16.0"
