diff --git a/src/shapes/Arrow.ts b/src/shapes/Arrow.ts
index 2f75115e..1488e7f6 100644
--- a/src/shapes/Arrow.ts
+++ b/src/shapes/Arrow.ts
@@ -6,7 +6,7 @@ import { _registerNode } from '../Global';
 import { Path } from './Path';
 
 export interface ArrowConfig extends LineConfig {
-  points: number[];
+  points: [number, number, number, number, number, number];
   tension?: number;
   closed?: boolean;
   pointerLength?: number;
diff --git a/src/shapes/Label.ts b/src/shapes/Label.ts
index d4c3128c..60b24c8e 100644
--- a/src/shapes/Label.ts
+++ b/src/shapes/Label.ts
@@ -176,10 +176,10 @@ Label.prototype.className = 'Label';
 _registerNode(Label);
 
 export interface TagConfig extends ShapeConfig {
-  pointerDirection?: string;
+  pointerDirection?: "up" | "right" | "left" | "down" | "none";
   pointerWidth?: number;
   pointerHeight?: number;
-  cornerRadius?: number | Array<number>;
+  cornerRadius?: number | [number] | [number, number] | [number, number, number] | [number, number, number, number];
 }
 
 /**
diff --git a/src/shapes/Line.ts b/src/shapes/Line.ts
index df80694c..3be8d7df 100644
--- a/src/shapes/Line.ts
+++ b/src/shapes/Line.ts
@@ -51,7 +51,7 @@ function expandPoints(p, tension) {
 }
 
 export interface LineConfig extends ShapeConfig {
-  points?: number[];
+  points?: [number, number, number, number, number, number];
   tension?: number;
   closed?: boolean;
   bezier?: boolean;
diff --git a/src/shapes/Rect.ts b/src/shapes/Rect.ts
index 27549e7f..3e26f256 100644
--- a/src/shapes/Rect.ts
+++ b/src/shapes/Rect.ts
@@ -5,7 +5,7 @@ import { _registerNode } from '../Global';
 import { GetSet } from '../types';
 import { getNumberOrArrayOfNumbersValidator } from '../Validators';
 export interface RectConfig extends ShapeConfig {
-  cornerRadius?: number | number[];
+  cornerRadius?: number | [number] | [number, number] | [number, number, number] | [number, number, number, number];
 }
 
 /**
diff --git a/src/shapes/Text.ts b/src/shapes/Text.ts
index 753d6de7..8edfb1f7 100644
--- a/src/shapes/Text.ts
+++ b/src/shapes/Text.ts
@@ -24,15 +24,15 @@ export interface TextConfig extends ShapeConfig {
   text?: string;
   fontFamily?: string;
   fontSize?: number;
-  fontStyle?: string;
-  fontVariant?: string;
-  textDecoration?: string;
-  align?: string;
-  verticalAlign?: string;
+  fontStyle?: "normal" | "bold" | "italic" | "italic bold" | "bold italic";
+  fontVariant?: "normal" | "small-caps";
+  textDecoration?: "line-through" | "underline" | "line-through underline" | "underline line-through";
+  align?: "left" | "center" | "right";
+  verticalAlign?: "top" | "middle" | "bottom";
   padding?: number;
   lineHeight?: number;
   letterSpacing?: number;
-  wrap?: string;
+  wrap?: "word" | "char" | "none";
   ellipsis?: boolean;
 }
 
diff --git a/src/shapes/TextPath.ts b/src/shapes/TextPath.ts
index c9732c15..41749ed5 100644
--- a/src/shapes/TextPath.ts
+++ b/src/shapes/TextPath.ts
@@ -13,7 +13,7 @@ export interface TextPathConfig extends ShapeConfig {
   data?: string;
   fontFamily?: string;
   fontSize?: number;
-  fontStyle?: string;
+  fontStyle?: "normal" | "bold" | "italic" | "italic bold" | "bold italic";
   letterSpacing?: number;
 }