diff --git a/packages/yoshiki/package.json b/packages/yoshiki/package.json
index d3554a0..d2807e8 100644
--- a/packages/yoshiki/package.json
+++ b/packages/yoshiki/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "yoshiki",
-	"version": "0.3.4",
+	"version": "0.3.5",
 	"author": "Zoe Roux <zoe.roux@sdg.moe> (https://github.com/AnonymusRaccoon)",
 	"license": "MIT",
 	"keywords": [
diff --git a/packages/yoshiki/src/web/generator.ts b/packages/yoshiki/src/web/generator.ts
index 4c86f89..3a399c0 100644
--- a/packages/yoshiki/src/web/generator.ts
+++ b/packages/yoshiki/src/web/generator.ts
@@ -43,7 +43,8 @@ const stateMapper: {
 const sanitize = (className: unknown) => {
 	const name = typeof className === "string" ? className : JSON.stringify(className);
 	if (name === undefined) return "undefined";
-	return name.replaceAll(/[^\w\d_]/g, "");
+	// Keep - as a _ for minus symbols.
+	return name.replaceAll("-", "_").replaceAll(/[^\w\d_]/g, "");
 };
 
 type PreprocessBlockFunction = (block: { [key: string]: unknown }) => { [key: string]: unknown };