diff --git a/perde-core/src/lib.rs b/perde-core/src/lib.rs
index bc696b0..5035cc3 100644
--- a/perde-core/src/lib.rs
+++ b/perde-core/src/lib.rs
@@ -21,7 +21,7 @@ pub mod prelude {
     pub use crate::object::{Object, ObjectRef};
     pub use crate::schema::{Schema, WithSchema};
     pub use crate::{
-        bail, bail_type_err, bail_value_err, err, exception, impl_default_methods, method_fastcall,
-        method_varargs, module, submodule, type_err, value_err,
+        add_submodule, bail, bail_type_err, bail_value_err, err, exception, impl_default_methods,
+        method_fastcall, method_varargs, module, submodule, type_err, value_err,
     };
 }
diff --git a/perde-core/src/methods.rs b/perde-core/src/methods.rs
index c3aa048..2eef63b 100644
--- a/perde-core/src/methods.rs
+++ b/perde-core/src/methods.rs
@@ -76,11 +76,26 @@ macro_rules! method_varargs {
     };
 }
 
+#[macro_export]
+macro_rules! add_submodule {
+    ($module:ident) => {
+        |py: pyo3::Python<'_>, _: &str, m: &pyo3::types::PyModule| -> pyo3::PyResult<()> {
+            let submodule = $module(py)?;
+            m.add_submodule(submodule)
+        }
+    };
+}
+
 #[macro_export]
 macro_rules! submodule {
-    ($module:tt) => {
-        |_: pyo3::Python<'_>, _: &str, m: &pyo3::types::PyModule| -> pyo3::PyResult<()> {
-            m.add_wrapped(pyo3::wrap_pymodule!($module))
+    ($module:tt, $($cls:expr),*) => {
+        pub fn $module(py: pyo3::Python<'_>) -> pyo3::PyResult<&pyo3::types::PyModule> {
+            let m = pyo3::types::PyModule::new(py, stringify!($module))?;
+            $({
+                let method = $cls;
+                method(py, concat!(stringify!($name), "\0"), m)?;
+            })*
+            Ok(m)
         }
     };
 }
@@ -191,7 +206,7 @@ macro_rules! impl_default_methods {
             }
         }
 
-        module!(
+        submodule!(
             $module_name,
             exception!($exception_type),
             method_varargs!(_loads, "loads", ""),
diff --git a/perde/src/lib.rs b/perde/src/lib.rs
index bf39c44..280692e 100644
--- a/perde/src/lib.rs
+++ b/perde/src/lib.rs
@@ -52,10 +52,10 @@ pub extern "C" fn resolve(
 
 module!(
     perde,
-    submodule!(json),
-    submodule!(toml),
-    submodule!(yaml),
-    submodule!(msgpack),
+    add_submodule!(json),
+    add_submodule!(toml),
+    add_submodule!(yaml),
+    add_submodule!(msgpack),
     exception!(Error),
     method_fastcall!(resolve, "resolve", "")
 );