diff --git a/src/PanoImageRenderer/PanoImageRenderer.ts b/src/PanoImageRenderer/PanoImageRenderer.ts
index e4a06e96c..462e51aad 100644
--- a/src/PanoImageRenderer/PanoImageRenderer.ts
+++ b/src/PanoImageRenderer/PanoImageRenderer.ts
@@ -595,7 +595,7 @@ class PanoImageRenderer extends Component<{
     const shaderProgram = WebGLUtils.createProgram(gl, vertexShader, fragmentShader);
 
     if (!shaderProgram) {
-      throw new Error(`Failed to intialize shaders: ${WebGLUtils.getErrorNameFromWebGLErrorCode(gl.getError())}`);
+      throw new Error(`Failed to initialize shaders: ${WebGLUtils.getErrorNameFromWebGLErrorCode(gl.getError())}`);
     }
 
     gl.useProgram(shaderProgram);
@@ -730,7 +730,7 @@ class PanoImageRenderer extends Component<{
       this._renderer.updateShaderData({imageAspectRatio});
     }
 
-    // intialize shader buffers after image is loaded.(by updateShaderData)
+    // initialize shader buffers after image is loaded.(by updateShaderData)
     // because buffer may be differ by image size.(eg. CylinderRenderer)
     this._initBuffers();
 
diff --git a/src/PanoImageRenderer/renderer/CylinderRenderer.ts b/src/PanoImageRenderer/renderer/CylinderRenderer.ts
index be4297f03..4c009cf8d 100644
--- a/src/PanoImageRenderer/renderer/CylinderRenderer.ts
+++ b/src/PanoImageRenderer/renderer/CylinderRenderer.ts
@@ -113,7 +113,7 @@ void main(void) {
       halfCylinderY = 0.5; // Range of cylinder is [-0.5, 0.5] to make height to 1.
     }
 
-    // intialize shader data before update
+    // initialize shader data before update
     textureCoordData.length = 0;
     vertexPositionData.length = 0;
     indexData.length = 0;
diff --git a/test/unit/YawPitchControl/ScreenRotationAngle.spec.js b/test/unit/YawPitchControl/ScreenRotationAngle.spec.js
index 7a9136a18..a7d86d8d0 100644
--- a/test/unit/YawPitchControl/ScreenRotationAngle.spec.js
+++ b/test/unit/YawPitchControl/ScreenRotationAngle.spec.js
@@ -169,7 +169,7 @@ describe("ScreenRotationAngle", () => {
 	});
 
 	describe("#unref", () => {
-		it("should intialize angle & not affected by deviceorientation.", done => {
+		it("should initialize angle & not affected by deviceorientation.", done => {
 			// Given
 			const sr = new ScreenRotationAngle();