diff --git a/.gitignore b/.gitignore
index dbcbea11a..2540f7300 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,7 +40,7 @@
 !release.nix
 !shell.nix
 !stack.yaml
-!weeder.dhall
+!weeder.toml
 !app/**
 !benchmark/**
 !citeproc/**
diff --git a/weeder.dhall b/weeder.dhall
deleted file mode 100644
index 5ef3252f8..000000000
--- a/weeder.dhall
+++ /dev/null
@@ -1 +0,0 @@
-{ roots = [ "^Main.main$", "^Paths_.*$" ] , type-class-roots = True }
diff --git a/weeder.toml b/weeder.toml
new file mode 100644
index 000000000..a38e82a12
--- /dev/null
+++ b/weeder.toml
@@ -0,0 +1,2 @@
+roots = [ "^Main.main$", "^Paths_.*$" ]
+type-class-roots = true