diff --git a/config.d.ts b/config.d.ts
index ac61f82..6c3ff0f 100644
--- a/config.d.ts
+++ b/config.d.ts
@@ -7,6 +7,7 @@ export interface Config {
 		importToPreview?: boolean
 		autoEnable?: boolean
 		gdkUserId?: string
+		fixInventoryItemRenderer?: boolean
 	}
 	packinfo?: {
 		name?: string
diff --git a/src/compilers/FormatProperties.ts b/src/compilers/FormatProperties.ts
index 7ab723c..bb7d556 100644
--- a/src/compilers/FormatProperties.ts
+++ b/src/compilers/FormatProperties.ts
@@ -1,42 +1,46 @@
-import { AnimationKeyframe } from "../components/AnimationKeyframe.js";
-import { AnimType } from "../types/enums/AnimType.js";
-import { KeyframeAnimationProperties } from "../types/properties/element/Animation.js";
-import { Binding } from "../types/properties/value.js";
+import { AnimationKeyframe } from "../components/AnimationKeyframe.js"
+import { AnimType } from "../types/enums/AnimType.js"
+import { BagBinding } from "../types/enums/BagBinding.js"
+import { KeyframeAnimationProperties } from "../types/properties/element/Animation.js"
+import { Binding } from "../types/properties/value.js"
+import { config } from "./Configuration.js"
 
 export function FormatProperties(properties: any) {
-  const property_bag: Record<Binding, any> = {};
+	const property_bag: Record<Binding, any> = {}
 
-  for (const key in properties) {
-    const value = properties[key];
+	for (const key in properties) {
+		const value = properties[key]
 
-    if (key.startsWith("#")) {
-      property_bag[<Binding>key] = value;
-      delete properties[key];
-    }
-  }
+		if (key.startsWith("#")) {
+			property_bag[<Binding>key] = value
+			delete properties[key]
+		}
+	}
 
-  if (properties.anchor) {
-    properties.anchor_from = properties.anchor_to = properties.anchor;
-    delete properties.anchor;
-  }
+	if (config.compiler?.fixInventoryItemRenderer && property_bag[BagBinding.ITEM_ID_AUX]) {
+		property_bag[BagBinding.ITEM_ID_AUX] = `(${property_bag[BagBinding.ITEM_ID_AUX]} / 1)`
+	}
 
-  if (Object.keys(property_bag).length) {
-    if (properties.property_bag) {
-      properties.property_bag = { ...property_bag, ...properties.property_bag };
-    } else {
-      properties.property_bag = property_bag;
-    }
-  }
+	if (properties.anchor) {
+		properties.anchor_from = properties.anchor_to = properties.anchor
+		delete properties.anchor
+	}
 
-  return properties;
+	if (Object.keys(property_bag).length) {
+		if (properties.property_bag) {
+			properties.property_bag = { ...property_bag, ...properties.property_bag }
+		} else {
+			properties.property_bag = property_bag
+		}
+	}
+
+	return properties
 }
 
-export function FormatAnimationProperties(
-  properties: KeyframeAnimationProperties<AnimType>,
-) {
-  if (properties.next instanceof AnimationKeyframe) {
-    properties.next = `${properties.next}`;
-  }
+export function FormatAnimationProperties(properties: KeyframeAnimationProperties<AnimType>) {
+	if (properties.next instanceof AnimationKeyframe) {
+		properties.next = `${properties.next}`
+	}
 
-  return properties;
+	return properties
 }
diff --git a/src/compilers/bindings/Function.ts b/src/compilers/bindings/Function.ts
index 2d70931..987ea62 100644
--- a/src/compilers/bindings/Function.ts
+++ b/src/compilers/bindings/Function.ts
@@ -49,20 +49,43 @@ export const defaultFunctions = {
 		}
 	},
 
-	sqrt: n => {
-		const notAllow = RandomBindingString()
-		const g = RandomBindingString()
-		const h = RandomBindingString()
+	sqrt: input => {
 		const ret = RandomBindingString()
 
+		const isNegative = RandomBindingString()
+		const isLowerThanTwo = RandomBindingString()
+		const next = RandomBindingString()
+		const nextEqualOrGreaterThan = RandomBindingString()
+
+		const isNextEqualOrGreaterThanRet = `(${nextEqualOrGreaterThan} * ${ret})`
+		const isNotNextEqualOrGreaterThanRet = `((not ${nextEqualOrGreaterThan}) * ${next})`
+
+		const lowerThanTwoPart = `(${isLowerThanTwo} * ${input})`
+		const notLowerThanTwoPart = `((not ${isLowerThanTwo}) * (${isNextEqualOrGreaterThanRet} + ${isNotNextEqualOrGreaterThanRet}))`
+
+		const negativePart = `(${isNegative} * -1)`
+		const notNegativePart = `((not ${isNegative}) * (${lowerThanTwoPart} + ${notLowerThanTwoPart}))`
+
 		return {
 			genBindings: [
 				{
-					source: `${n} / 2`,
-					target: g,
+					source: `(${input} < 2)`,
+					target: isLowerThanTwo,
 				},
 				{
-					source: `(${notAllow} * -1)`,
+					source: input,
+					target: ret,
+				},
+				{
+					source: `(${ret} + ${input} / ${ret}) / 2`,
+					target: next,
+				},
+				{
+					source: `(${next} = ${ret}) or (${next} > ${ret})`,
+					target: nextEqualOrGreaterThan,
+				},
+				{
+					source: `${negativePart} + ${notNegativePart}`,
 					target: ret,
 				},
 			],
@@ -86,6 +109,10 @@ export const defaultFunctions = {
 		}
 	},
 
+	// str_length: str => {
+	// 	if (!/\#\w+/.test(str)) throw new Error("Invalid string")
+	// }
+
 	/**
 	 * Return a translatable string
 	 * @param key