diff --git a/src/lib/openSCAD/parseParameter.ts b/src/lib/openSCAD/parseParameter.ts
index 7bf98da..4aee53f 100644
--- a/src/lib/openSCAD/parseParameter.ts
+++ b/src/lib/openSCAD/parseParameter.ts
@@ -13,7 +13,7 @@ export default function parseParameters(script: string): Parameter[] {
   script = script.split(/^(module |function )/m)[0];
 
   const parameters: Record<string, Parameter> = {};
-  const parameterRegex = /^(\w+)\s*=\s*([^;]+)/gm; // TODO: Use AST parser instead of regex
+  const parameterRegex = /^([a-z0-9A-Z_\$]+)\s*=\s*([^;]+)/gm; // TODO: Use AST parser instead of regex
   const groupRegex = /^\/\*\s*\[([^\]]+)\]\s*\*\//gm;
 
   const groupSections: { id: string; group: string; code: string }[] = [];
diff --git a/tests/__snapshots__/openSCADparseParameters.test.ts.snap b/tests/__snapshots__/openSCADparseParameters.test.ts.snap
index 488eb9f..1b7275e 100644
--- a/tests/__snapshots__/openSCADparseParameters.test.ts.snap
+++ b/tests/__snapshots__/openSCADparseParameters.test.ts.snap
@@ -471,6 +471,39 @@ exports[`testing parameter parsing of openscad scripts testing slider.scad: slid
 ]
 `;
 
+exports[`testing parameter parsing of openscad scripts testing specialChars.scad: specialChars.scad 1`] = `
+[
+  {
+    "description": undefined,
+    "group": "Settings",
+    "name": "$fn",
+    "type": "number",
+    "value": 200,
+  },
+  {
+    "description": undefined,
+    "group": "Settings",
+    "name": "width",
+    "type": "number",
+    "value": 30,
+  },
+  {
+    "description": undefined,
+    "group": "Settings",
+    "name": "length",
+    "type": "number",
+    "value": 50,
+  },
+  {
+    "description": undefined,
+    "group": "Hidden",
+    "name": "height",
+    "type": "number",
+    "value": 10,
+  },
+]
+`;
+
 exports[`testing parameter parsing of openscad scripts testing specialVector.scad: specialVector.scad 1`] = `
 [
   {
diff --git a/tests/fixtures/openSCAD/specialChars.scad b/tests/fixtures/openSCAD/specialChars.scad
new file mode 100644
index 0000000..209df74
--- /dev/null
+++ b/tests/fixtures/openSCAD/specialChars.scad
@@ -0,0 +1,13 @@
+// test
+
+/* [Settings] */
+
+$fn = 200;
+width = 30;
+length = 50;
+
+/* [Hidden] */
+
+height = 10;
+
+cube([width,length,height]);