diff --git a/changelog.d/16394.misc b/changelog.d/16394.misc
new file mode 100644
index 0000000000..ee08c3e024
--- /dev/null
+++ b/changelog.d/16394.misc
@@ -0,0 +1 @@
+Update maturin configuration.
diff --git a/pyproject.toml b/pyproject.toml
index bf51276f4a..5fb64479a1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -92,6 +92,7 @@ skip_gitignore = true
 
 [tool.maturin]
 manifest-path = "rust/Cargo.toml"
+module-name = "synapse.synapse_rust"
 
 [tool.poetry]
 name = "matrix-synapse"
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index 16917136db..26403d58cc 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -15,6 +15,8 @@ name = "synapse"
 # tests/benchmarks.
 crate-type = ["lib", "cdylib"]
 
+# This is deprecated, see tool.maturin in pyproject.toml.
+# It is left here for compatibilty with maturin < 0.15.
 [package.metadata.maturin]
 # This is where we tell maturin where to place the built library.
 name = "synapse.synapse_rust"