diff --git a/src/key_operations/mod.rs b/src/key_operations.rs
similarity index 100%
rename from src/key_operations/mod.rs
rename to src/key_operations.rs
diff --git a/src/main.rs b/src/main.rs
index da0b4ec..0374e71 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,8 +2,8 @@
 //! 
 //! `footswitch-rs` enables you to use footswitches of <xxx>
 //! 
-mod key_operations;
-mod pedal_operations;
+pub mod key_operations;
+pub mod pedal_operations;
 
 #[macro_use]
 mod messages;
diff --git a/src/pedal_operations.rs b/src/pedal_operations.rs
index d2a7404..2d5972c 100644
--- a/src/pedal_operations.rs
+++ b/src/pedal_operations.rs
@@ -1,6 +1,6 @@
 #[macro_use]
-#[path = "messages.rs"] mod messages;
-#[path = "key_operations.rs"] mod key_operations;
+#[path = "messages.rs"] pub mod messages;
+#[path = "key_operations.rs"] pub mod key_operations;
 
 extern crate hidapi;
 use std::process;