diff --git a/src/Canvas.ts b/src/Canvas.ts
index ef1784376..62d766418 100644
--- a/src/Canvas.ts
+++ b/src/Canvas.ts
@@ -136,7 +136,7 @@ export class Canvas {
     } catch (e) {
       try {
         return this._canvas.toDataURL();
-      } catch (err) {
+      } catch (err: any) {
         Util.error(
           'Unable to get data URL. ' +
             err.message +
diff --git a/src/Container.ts b/src/Container.ts
index 447e6c980..a6bfb1f0c 100644
--- a/src/Container.ts
+++ b/src/Container.ts
@@ -226,16 +226,16 @@ export abstract class Container<
     var result = this._generalFind<ChildNode>(selector, true);
     return result.length > 0 ? result[0] : undefined;
   }
-  _generalFind<ChildNode extends Node = Node>(
+  _generalFind<ChildNode extends Node>(
     selector: string | Function,
     findOne: boolean
   ) {
     var retArr: Array<ChildNode> = [];
 
-    this._descendants((node: ChildNode) => {
+    this._descendants((node) => {
       const valid = node._isMatch(selector);
       if (valid) {
-        retArr.push(node);
+        retArr.push(node as unknown as ChildNode);
       }
       if (valid && findOne) {
         return true;
@@ -256,7 +256,7 @@ export abstract class Container<
       if (!child.hasChildren()) {
         continue;
       }
-      shouldStop = (child as any)._descendants(fn);
+      shouldStop = (child as unknown as Container)._descendants(fn);
       if (shouldStop) {
         return true;
       }
@@ -527,10 +527,7 @@ export abstract class Container<
   // there was "this" instead of "Container<ChildType>",
   // but it breaks react-konva types: https://github.com/konvajs/react-konva/issues/390
   clipFunc: GetSet<
-    (
-      ctx: CanvasRenderingContext2D,
-      shape: Container<ChildType>
-    ) => ClipFuncOutput,
+    (ctx: CanvasRenderingContext2D, shape: Container) => ClipFuncOutput,
     this
   >;
 }
diff --git a/src/Context.ts b/src/Context.ts
index ab4d14a27..d31ed3600 100644
--- a/src/Context.ts
+++ b/src/Context.ts
@@ -367,7 +367,7 @@ export class Context {
   clip(fillRule?: CanvasFillRule): void;
   clip(path: Path2D, fillRule?: CanvasFillRule): void;
   clip(...args: any[]) {
-    this._context.clip.apply(this._context, args);
+    this._context.clip.apply(this._context, args as any);
   }
   /**
    * closePath function.
@@ -509,7 +509,7 @@ export class Context {
   fill(path: Path2D, fillRule?: CanvasFillRule): void;
   fill(...args: any[]) {
     // this._context.fill();
-    this._context.fill.apply(this._context, args);
+    this._context.fill.apply(this._context, args as any);
   }
   /**
    * fillRect function.
@@ -736,7 +736,7 @@ export class Context {
 
     // attrs
     that.setAttr = function () {
-      origSetter.apply(that, arguments);
+      origSetter.apply(that, arguments as any);
       var prop = arguments[0];
       var val = arguments[1];
       if (
diff --git a/src/Factory.ts b/src/Factory.ts
index 2c252bd57..e50029579 100644
--- a/src/Factory.ts
+++ b/src/Factory.ts
@@ -1,3 +1,4 @@
+import { Node } from './Node';
 import { Util } from './Util';
 import { getComponentValidator } from './Validators';
 
@@ -15,7 +16,7 @@ export const Factory = {
 
     constructor.prototype[method] =
       constructor.prototype[method] ||
-      function () {
+      function (this: Node) {
         var val = this.attrs[attr];
         return val === undefined ? def : val;
       };
@@ -147,7 +148,7 @@ export const Factory = {
       var oldGetter = GET + Util._capitalize(oldMethodName);
       var oldSetter = SET + Util._capitalize(oldMethodName);
 
-      function deprecated() {
+      function deprecated(this: Node) {
         method.apply(this, arguments);
         Util.error(
           '"' +
@@ -163,7 +164,7 @@ export const Factory = {
       constructor.prototype[oldSetter] = deprecated;
     });
   },
-  afterSetFilter() {
+  afterSetFilter(this: Node) {
     this._filterUpToDate = false;
   },
 };
diff --git a/src/Node.ts b/src/Node.ts
index e4d26eb4c..c7048e6f3 100644
--- a/src/Node.ts
+++ b/src/Node.ts
@@ -145,7 +145,7 @@ export abstract class Node<Config extends NodeConfig = NodeConfig> {
   attrs: any = {};
   index = 0;
   _allEventListeners: null | Array<Function> = null;
-  parent: Container<Node> | null = null;
+  parent: Container | null = null;
   _cache: Map<string, any> = new Map<string, any>();
   _attachedDepsListeners: Map<string, boolean> = new Map<string, boolean>();
   _lastPos: Vector2d | null = null;
@@ -486,7 +486,7 @@ export abstract class Node<Config extends NodeConfig = NodeConfig> {
     skipTransform?: boolean;
     skipShadow?: boolean;
     skipStroke?: boolean;
-    relativeTo?: Container<Node>;
+    relativeTo?: Container;
   }): { x: number; y: number; width: number; height: number } {
     // abstract method
     // redefine in Container and Shape
@@ -607,7 +607,7 @@ export abstract class Node<Config extends NodeConfig = NodeConfig> {
             filter.call(this, imageData);
             filterContext.putImageData(imageData, 0, 0);
           }
-        } catch (e) {
+        } catch (e: any) {
           Util.error(
             'Unable to apply filter. ' +
               e.message +
@@ -690,7 +690,7 @@ export abstract class Node<Config extends NodeConfig = NodeConfig> {
     this._cache && this._cache.delete(ALL_LISTENERS);
 
     if (arguments.length === 3) {
-      return this._delegate.apply(this, arguments);
+      return this._delegate.apply(this, arguments as any);
     }
     var events = (evtStr as string).split(SPACE),
       len = events.length,
@@ -810,7 +810,7 @@ export abstract class Node<Config extends NodeConfig = NodeConfig> {
       for (var i = 0; i < targets.length; i++) {
         evt = Util.cloneObject(evt);
         evt.currentTarget = targets[i];
-        handler.call(targets[i], evt);
+        handler.call(targets[i], evt as any);
       }
     });
   }
@@ -2584,6 +2584,7 @@ export abstract class Node<Config extends NodeConfig = NodeConfig> {
     return Util.haveIntersection(screenRect, this.getClientRect());
   }
 
+  // @ts-ignore:
   preventDefault: GetSet<boolean, this>;
 
   // from filters
@@ -2605,7 +2606,10 @@ export abstract class Node<Config extends NodeConfig = NodeConfig> {
   threshold: GetSet<number, this>;
   value: GetSet<number, this>;
 
-  dragBoundFunc: GetSet<(this: Node, pos: Vector2d) => Vector2d, this>;
+  dragBoundFunc: GetSet<
+    (this: Node, pos: Vector2d, event: any) => Vector2d,
+    this
+  >;
   draggable: GetSet<boolean, this>;
   dragDistance: GetSet<number, this>;
   embossBlend: GetSet<boolean, this>;
@@ -3161,7 +3165,7 @@ addGetterSetter(Node, 'listening', true, getBooleanValidator());
 
 addGetterSetter(Node, 'preventDefault', true, getBooleanValidator());
 
-addGetterSetter(Node, 'filters', null, function (val) {
+addGetterSetter(Node, 'filters', null, function (this: Node, val) {
   this._filterUpToDate = false;
   return val;
 });
diff --git a/src/Shape.ts b/src/Shape.ts
index fd6b0d27e..607a5b9b8 100644
--- a/src/Shape.ts
+++ b/src/Shape.ts
@@ -117,7 +117,7 @@ export const shapes: { [key: string]: Shape } = {};
 // the approach is good. But what if we want to cache the shape before we add it into the stage
 // what color to use for hit test?
 
-function _fillFunc(context) {
+function _fillFunc(this: Node, context) {
   const fillRule = this.attrs.fillRule;
   if (fillRule) {
     context.fill(fillRule);
@@ -135,23 +135,23 @@ function _strokeFuncHit(context) {
   context.stroke();
 }
 
-function _clearHasShadowCache() {
+function _clearHasShadowCache(this: Node) {
   this._clearCache(HAS_SHADOW);
 }
 
-function _clearGetShadowRGBACache() {
+function _clearGetShadowRGBACache(this: Node) {
   this._clearCache(SHADOW_RGBA);
 }
 
-function _clearFillPatternCache() {
+function _clearFillPatternCache(this: Node) {
   this._clearCache(patternImage);
 }
 
-function _clearLinearGradientCache() {
+function _clearLinearGradientCache(this: Node) {
   this._clearCache(linearGradient);
 }
 
-function _clearRadialGradientCache() {
+function _clearRadialGradientCache(this: Node) {
   this._clearCache(radialGradient);
 }
 
@@ -750,7 +750,7 @@ export class Shape<
         }
       }
       hitContext.putImageData(hitImageData, 0, 0);
-    } catch (e) {
+    } catch (e: any) {
       Util.error(
         'Unable to draw hit graph from cached scene canvas. ' + e.message
       );
diff --git a/src/Stage.ts b/src/Stage.ts
index a1bbb7cf6..4740d796e 100644
--- a/src/Stage.ts
+++ b/src/Stage.ts
@@ -264,7 +264,7 @@ export class Stage extends Container<Layer> {
     }
     obj.container =
       typeof document !== 'undefined' && document.createElement('div');
-    return Container.prototype.clone.call(this, obj);
+    return Container.prototype.clone.call(this, obj) as this;
   }
 
   destroy() {
diff --git a/src/Util.ts b/src/Util.ts
index 5cbcc281f..60b54f889 100644
--- a/src/Util.ts
+++ b/src/Util.ts
@@ -577,7 +577,7 @@ export const Util = {
     var rgb;
     // color string
     if (color in COLORS) {
-      rgb = COLORS[color];
+      rgb = COLORS[color as keyof typeof COLORS];
       return {
         r: rgb[0],
         g: rgb[1],
@@ -588,7 +588,7 @@ export const Util = {
       return this._hexToRgb(color.substring(1));
     } else if (color.substr(0, 4) === RGB_PAREN) {
       // rgb string
-      rgb = RGB_REGEX.exec(color.replace(/ /g, ''));
+      rgb = RGB_REGEX.exec(color.replace(/ /g, '')) as RegExpExecArray;
       return {
         r: parseInt(rgb[1], 10),
         g: parseInt(rgb[2], 10),
@@ -620,7 +620,7 @@ export const Util = {
   },
   // Parse named css color. Like "green"
   _namedColorToRBA(str: string) {
-    var c = COLORS[str.toLowerCase()];
+    var c = COLORS[str.toLowerCase() as keyof typeof COLORS];
     if (!c) {
       return null;
     }
@@ -794,7 +794,7 @@ export const Util = {
       if (this._isPlainObject(obj[key])) {
         retObj[key] = this.cloneObject(obj[key]);
       } else if (this._isArray(obj[key])) {
-        retObj[key] = this.cloneArray(obj[key]);
+        retObj[key] = this.cloneArray(obj[key] as Array<any>);
       } else {
         retObj[key] = obj[key];
       }
@@ -822,7 +822,7 @@ export const Util = {
     );
     return Util.radToDeg(rad);
   },
-  _getRotation(radians) {
+  _getRotation(radians: number) {
     return Konva.angleDeg ? Util.radToDeg(radians) : radians;
   },
   _capitalize(str: string) {
@@ -840,12 +840,12 @@ export const Util = {
     }
     console.warn(KONVA_WARNING + str);
   },
-  each(obj, func) {
+  each(obj: Object, func: Function) {
     for (var key in obj) {
-      func(key, obj[key]);
+      func(key, obj[key as keyof typeof obj]);
     }
   },
-  _inRange(val, left, right) {
+  _inRange(val: number, left: number, right: number) {
     return left <= val && val < right;
   },
   _getProjectionToSegment(x1, y1, x2, y2, x3, y3) {
@@ -876,7 +876,7 @@ export const Util = {
   },
   // line as array of points.
   // line might be closed
-  _getProjectionToLine(pt: Vector2d, line, isClosed) {
+  _getProjectionToLine(pt: Vector2d, line: Array<Vector2d>, isClosed: boolean) {
     var pc = Util.cloneObject(pt);
     var dist = Number.MAX_VALUE;
     line.forEach(function (p1, i) {
diff --git a/src/filters/Blur.ts b/src/filters/Blur.ts
index ef29f4e42..4cd12556e 100644
--- a/src/filters/Blur.ts
+++ b/src/filters/Blur.ts
@@ -46,7 +46,7 @@ import { getNumberValidator } from '../Validators';
      OTHER DEALINGS IN THE SOFTWARE.
      */
 
-function BlurStack() {
+function BlurStack(this: any) {
   this.r = 0;
   this.g = 0;
   this.b = 0;
diff --git a/src/filters/RGB.ts b/src/filters/RGB.ts
index 6af6568cc..3886f3ae7 100644
--- a/src/filters/RGB.ts
+++ b/src/filters/RGB.ts
@@ -35,7 +35,7 @@ export const RGB: Filter = function (imageData) {
   }
 };
 
-Factory.addGetterSetter(Node, 'red', 0, function (val) {
+Factory.addGetterSetter(Node, 'red', 0, function (this: Node, val) {
   this._filterUpToDate = false;
   if (val > 255) {
     return 255;
@@ -54,7 +54,7 @@ Factory.addGetterSetter(Node, 'red', 0, function (val) {
  * @returns {Integer}
  */
 
-Factory.addGetterSetter(Node, 'green', 0, function (val) {
+Factory.addGetterSetter(Node, 'green', 0, function (this: Node, val) {
   this._filterUpToDate = false;
   if (val > 255) {
     return 255;
diff --git a/src/filters/RGBA.ts b/src/filters/RGBA.ts
index 5fe107295..793128c63 100644
--- a/src/filters/RGBA.ts
+++ b/src/filters/RGBA.ts
@@ -36,7 +36,7 @@ export const RGBA: Filter = function (imageData) {
   }
 };
 
-Factory.addGetterSetter(Node, 'red', 0, function (val) {
+Factory.addGetterSetter(Node, 'red', 0, function (this: Node, val: number) {
   this._filterUpToDate = false;
   if (val > 255) {
     return 255;
@@ -55,7 +55,7 @@ Factory.addGetterSetter(Node, 'red', 0, function (val) {
  * @returns {Integer}
  */
 
-Factory.addGetterSetter(Node, 'green', 0, function (val) {
+Factory.addGetterSetter(Node, 'green', 0, function (this: Node, val) {
   this._filterUpToDate = false;
   if (val > 255) {
     return 255;
@@ -84,7 +84,7 @@ Factory.addGetterSetter(Node, 'blue', 0, RGBComponent, Factory.afterSetFilter);
  * @returns {Integer}
  */
 
-Factory.addGetterSetter(Node, 'alpha', 1, function (val) {
+Factory.addGetterSetter(Node, 'alpha', 1, function (this: Node, val) {
   this._filterUpToDate = false;
   if (val > 1) {
     return 1;
diff --git a/src/shapes/Text.ts b/src/shapes/Text.ts
index a7820c421..d65ede8ac 100644
--- a/src/shapes/Text.ts
+++ b/src/shapes/Text.ts
@@ -104,10 +104,10 @@ function getDummyContext() {
   return dummyContext;
 }
 
-function _fillFunc(context: Context) {
+function _fillFunc(this: Text, context: Context) {
   context.fillText(this._partialText, this._partialTextX, this._partialTextY);
 }
-function _strokeFunc(context: Context) {
+function _strokeFunc(this: Text, context: Context) {
   context.setAttr('miterLimit', 2);
   context.strokeText(this._partialText, this._partialTextX, this._partialTextY);
 }
diff --git a/src/shapes/TextPath.ts b/src/shapes/TextPath.ts
index 150f8f8c0..f329ef3a2 100644
--- a/src/shapes/TextPath.ts
+++ b/src/shapes/TextPath.ts
@@ -21,10 +21,10 @@ export interface TextPathConfig extends ShapeConfig {
 var EMPTY_STRING = '',
   NORMAL = 'normal';
 
-function _fillFunc(context) {
+function _fillFunc(this: TextPath, context) {
   context.fillText(this.partialText, 0, 0);
 }
-function _strokeFunc(context) {
+function _strokeFunc(this: TextPath, context) {
   context.strokeText(this.partialText, 0, 0);
 }
 
diff --git a/src/shapes/Transformer.ts b/src/shapes/Transformer.ts
index 97a61c9a8..cb51c97dc 100644
--- a/src/shapes/Transformer.ts
+++ b/src/shapes/Transformer.ts
@@ -551,11 +551,9 @@ export class Transformer extends Group {
   _createElements() {
     this._createBack();
 
-    ANCHORS_NAMES.forEach(
-      function (name) {
-        this._createAnchor(name);
-      }.bind(this)
-    );
+    ANCHORS_NAMES.forEach((name) => {
+      this._createAnchor(name);
+    });
 
     this._createAnchor('rotater');
   }
@@ -605,25 +603,25 @@ export class Transformer extends Group {
       width: 0,
       height: 0,
       draggable: true,
-      sceneFunc(ctx) {
-        var tr = this.getParent();
+      sceneFunc(ctx, shape) {
+        var tr = shape.getParent() as Transformer;
         var padding = tr.padding();
         ctx.beginPath();
         ctx.rect(
           -padding,
           -padding,
-          this.width() + padding * 2,
-          this.height() + padding * 2
+          shape.width() + padding * 2,
+          shape.height() + padding * 2
         );
-        ctx.moveTo(this.width() / 2, -padding);
+        ctx.moveTo(shape.width() / 2, -padding);
         if (tr.rotateEnabled()) {
           ctx.lineTo(
-            this.width() / 2,
-            -tr.rotateAnchorOffset() * Util._sign(this.height()) - padding
+            shape.width() / 2,
+            -tr.rotateAnchorOffset() * Util._sign(shape.height()) - padding
           );
         }
 
-        ctx.fillStrokeShape(this);
+        ctx.fillStrokeShape(shape);
       },
       hitFunc: (ctx, shape) => {
         if (!this.shouldOverdrawWholeArea()) {
diff --git a/test/sandbox.html b/test/sandbox.html
index a46d40666..4b19f3695 100644
--- a/test/sandbox.html
+++ b/test/sandbox.html
@@ -46,6 +46,7 @@
         fill: 'red',
         draggable: true,
       });
+
       layer.add(circle);
 
       const tr = new Konva.Transformer({
diff --git a/tsconfig.json b/tsconfig.json
index 83ad40e03..a9c5df04c 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -9,7 +9,14 @@
     "moduleResolution": "node",
     "declaration": true,
     "removeComments": false,
-    "strictNullChecks": true,
+
+    "strict": true,
+    "noImplicitAny": false,
+    "noImplicitThis": false,
+    "useUnknownInCatchVariables": false,
+    // probably we would never enable this one
+    // because it's too strict, konva generates many functions on the runtime
+    "strictPropertyInitialization": false,
   },
   "include": ["./src/**/*.ts"]
 }