diff --git a/assets/music/Galactic_Rap.mp3 b/assets/music/Galactic_Rap.mp3
deleted file mode 100644
index 41e09d9..0000000
Binary files a/assets/music/Galactic_Rap.mp3 and /dev/null differ
diff --git a/assets/music/Galactic_Rap.ogg b/assets/music/Galactic_Rap.ogg
new file mode 100644
index 0000000..3a0f56d
Binary files /dev/null and b/assets/music/Galactic_Rap.ogg differ
diff --git a/assets/music/Galactic_Rap_Destroyed.mp3 b/assets/music/Galactic_Rap_Destroyed.mp3
deleted file mode 100644
index 6d44bad..0000000
Binary files a/assets/music/Galactic_Rap_Destroyed.mp3 and /dev/null differ
diff --git a/assets/music/Galactic_Rap_Destroyed.ogg b/assets/music/Galactic_Rap_Destroyed.ogg
new file mode 100644
index 0000000..df5329a
Binary files /dev/null and b/assets/music/Galactic_Rap_Destroyed.ogg differ
diff --git a/assets/music/Galactic_Rap_Speedup.mp3 b/assets/music/Galactic_Rap_Speedup.mp3
deleted file mode 100644
index 01a2606..0000000
Binary files a/assets/music/Galactic_Rap_Speedup.mp3 and /dev/null differ
diff --git a/assets/music/Galactic_Rap_Speedup.ogg b/assets/music/Galactic_Rap_Speedup.ogg
new file mode 100644
index 0000000..34d2da0
Binary files /dev/null and b/assets/music/Galactic_Rap_Speedup.ogg differ
diff --git a/assets/music/Mesmerizing_Galaxy_Broken.mp3 b/assets/music/Mesmerizing_Galaxy_Broken.mp3
deleted file mode 100644
index 8d0320b..0000000
Binary files a/assets/music/Mesmerizing_Galaxy_Broken.mp3 and /dev/null differ
diff --git a/assets/music/Mesmerizing_Galaxy_Broken.ogg b/assets/music/Mesmerizing_Galaxy_Broken.ogg
new file mode 100644
index 0000000..69c9cee
Binary files /dev/null and b/assets/music/Mesmerizing_Galaxy_Broken.ogg differ
diff --git a/assets/music/Mesmerizing_Galaxy_Loop.mp3 b/assets/music/Mesmerizing_Galaxy_Loop.mp3
deleted file mode 100644
index 0f6bba3..0000000
Binary files a/assets/music/Mesmerizing_Galaxy_Loop.mp3 and /dev/null differ
diff --git a/assets/music/Mesmerizing_Galaxy_Loop.ogg b/assets/music/Mesmerizing_Galaxy_Loop.ogg
new file mode 100644
index 0000000..923d690
Binary files /dev/null and b/assets/music/Mesmerizing_Galaxy_Loop.ogg differ
diff --git a/assets/sounds/bzz.mp3 b/assets/sounds/bzz.mp3
deleted file mode 100644
index bde2f73..0000000
Binary files a/assets/sounds/bzz.mp3 and /dev/null differ
diff --git a/assets/sounds/bzz.ogg b/assets/sounds/bzz.ogg
new file mode 100644
index 0000000..029f567
Binary files /dev/null and b/assets/sounds/bzz.ogg differ
diff --git a/build.rs b/build.rs
index abef7e2..11082bd 100644
--- a/build.rs
+++ b/build.rs
@@ -69,7 +69,7 @@ impl AssetsWriter {
 		const_name
 	}
 
-	fn add_mp3<P: AsRef<Path> + Copy>(&mut self, canonical_path: P) -> String {
+	fn add_ogg<P: AsRef<Path> + Copy>(&mut self, canonical_path: P) -> String {
 		let const_name = Self::asset_name(canonical_path);
 		writeln!(self.file, "// {}", canonical_path.as_ref().display()).unwrap();
 		writeln!(
@@ -206,8 +206,8 @@ fn process_dir<P: AsRef<Path> + Copy>(
 			groups.pop();
 		} else if path.extension().map(|ext| ext == "svg").unwrap_or(false) {
 			process_svg(&path, dir, writer, groups);
-		} else if path.extension().map(|ext| ext == "mp3").unwrap_or(false) {
-			process_mp3(&path, dir, writer, groups);
+		} else if path.extension().map(|ext| ext == "ogg").unwrap_or(false) {
+			process_ogg(&path, dir, writer, groups);
 		}
 	}
 }
@@ -258,13 +258,13 @@ fn process_svg<P: AsRef<Path> + Copy, Q: AsRef<Path>>(
 	);
 }
 
-fn process_mp3<P: AsRef<Path> + Copy, Q: AsRef<Path>>(
+fn process_ogg<P: AsRef<Path> + Copy, Q: AsRef<Path>>(
 	file: P,
 	dir: Q,
 	writer: &mut AssetsWriter,
 	groups: &[String]
 ) {
-	let const_name = writer.add_mp3(
+	let const_name = writer.add_ogg(
 		&file
 			.as_ref()
 			.canonicalize()