diff --git a/py/math_expression.py b/py/math_expression.py
index 497f0e9..53c54e9 100644
--- a/py/math_expression.py
+++ b/py/math_expression.py
@@ -3,6 +3,15 @@ import math
 import random
 import operator as op
 
+# Hack: string type that is always equal in not equal comparisons
+class AnyType(str):
+    def __ne__(self, __value: object) -> bool:
+        return False
+
+
+# Our any instance wants to be a wildcard string
+any = AnyType("*")
+
 operators = {
     ast.Add: op.add,
     ast.Sub: op.sub,
@@ -98,9 +107,9 @@ class MathExpression:
                 }}),
             },
             "optional": {
-                "a": ("INT,FLOAT,IMAGE,LATENT", ),
-                "b": ("INT,FLOAT,IMAGE,LATENT",),
-                "c": ("INT,FLOAT,IMAGE,LATENT", ),
+                "a": (any, ),
+                "b": (any,),
+                "c": (any, ),
             },
             "hidden": {"extra_pnginfo": "EXTRA_PNGINFO",
                        "prompt": "PROMPT"},
diff --git a/web/js/mathExpression.js b/web/js/mathExpression.js
index 2409cf1..d0dde50 100644
--- a/web/js/mathExpression.js
+++ b/web/js/mathExpression.js
@@ -14,6 +14,15 @@ app.registerExtension({
 	beforeRegisterNodeDef(nodeType) {
 		if (nodeType.comfyClass === "MathExpression|pysssss") {
 			const onDrawForeground = nodeType.prototype.onDrawForeground;
+
+			nodeType.prototype.onNodeCreated = function() {
+				// These are typed as any to bypass backend validation
+				// update frontend to restrict types
+				for(const input of this.inputs) {
+					input.type = "INT,FLOAT,IMAGE,LATENT";
+				}
+			}
+
 			nodeType.prototype.onDrawForeground = function (ctx) {
 				const r = onDrawForeground?.apply?.(this, arguments);