diff --git a/src/parser.js b/src/parser.js
index 683344c..99ca1ba 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -113,7 +113,7 @@ function getPostCoverImageId(postData) {
 function collectAttachedImages(channelData) {
 	const images = getItemsOfType(channelData, 'attachment')
 		// filter to certain image file types
-		.filter(attachment => attachment.attachment_url && (/\.(gif|jpe?g|png)$/i).test(attachment.attachment_url[0]))
+		.filter(attachment => attachment.attachment_url && (/\.(gif|jpe?g|png|webp)$/i).test(attachment.attachment_url[0]))
 		.map(attachment => ({
 			id: attachment.post_id[0],
 			postId: attachment.post_parent[0],
@@ -132,7 +132,7 @@ function collectScrapedImages(channelData, postTypes) {
 			const postContent = postData.encoded[0];
 			const postLink = postData.link[0];
 
-			const matches = [...postContent.matchAll(/<img[^>]*src="(.+?\.(?:gif|jpe?g|png))"[^>]*>/gi)];
+			const matches = [...postContent.matchAll(/<img[^>]*src="(.+?\.(?:gif|jpe?g|png|webp))"[^>]*>/gi)];
 			matches.forEach(match => {
 				// base the matched image URL relative to the post URL
 				const url = new URL(match[1], postLink).href;
diff --git a/src/translator.js b/src/translator.js
index 2a24452..c974599 100644
--- a/src/translator.js
+++ b/src/translator.js
@@ -105,7 +105,7 @@ function getPostContent(postData, turndownService, config) {
 	if (config.saveScrapedImages) {
 		// writeImageFile() will save all content images to a relative /images
 		// folder so update references in post content to match
-		content = content.replace(/(<img[^>]*src=").*?([^/"]+\.(?:gif|jpe?g|png))("[^>]*>)/gi, '$1images/$2$3');
+		content = content.replace(/(<img[^>]*src=").*?([^/"]+\.(?:gif|jpe?g|png|webp))("[^>]*>)/gi, '$1images/$2$3');
 	}
 
 	// preserve "more" separator, max one per post, optionally with custom label
diff --git a/src/wizard.js b/src/wizard.js
index 5285b8d..88a722d 100644
--- a/src/wizard.js
+++ b/src/wizard.js
@@ -74,6 +74,12 @@ const options = [
 		type: 'boolean',
 		description: 'Include custom post types and pages',
 		default: false
+	},
+	{
+		name: 'disable-strict-ssl',
+		type: 'boolean',
+		description: 'Strict SSL prevents image retrieval from self-signed servers',
+		default: false
 	}
 ];
 
diff --git a/src/writer.js b/src/writer.js
index b782756..fa02ce1 100644
--- a/src/writer.js
+++ b/src/writer.js
@@ -16,7 +16,7 @@ async function processPayloadsPromise(payloads, loadFunc) {
 	const promises = payloads.map(payload => new Promise((resolve, reject) => {
 		setTimeout(async () => {
 			try {
-				const data = await loadFunc(payload.item);
+				const data = await loadFunc(payload.item, payload.strictSSL);
 				await writeFile(payload.destinationPath, data);
 				console.log(chalk.green('[OK]') + ' ' + payload.name);
 				resolve();
@@ -55,6 +55,7 @@ async function writeMarkdownFilesPromise(posts, config ) {
 			const payload = {
 				item: post,
 				name: (config.includeOtherTypes ? post.meta.type + ' - ' : '') + post.meta.slug,
+				strictSSL: !config.disableStrictSsl,
 				destinationPath,
 				delay
 			};
@@ -72,7 +73,7 @@ async function writeMarkdownFilesPromise(posts, config ) {
 	}
 }
 
-async function loadMarkdownFilePromise(post) {
+async function loadMarkdownFilePromise(post, strictSSL) {
 	let output = '---\n';
 
 	Object.entries(post.frontmatter).forEach(([key, value]) => {
@@ -117,6 +118,7 @@ async function writeImageFilesPromise(posts, config) {
 				const payload = {
 					item: imageUrl,
 					name: filename,
+					strictSSL: !config.disableStrictSsl,
 					destinationPath,
 					delay
 				};
@@ -135,7 +137,7 @@ async function writeImageFilesPromise(posts, config) {
 	}
 }
 
-async function loadImageFilePromise(imageUrl) {
+async function loadImageFilePromise(imageUrl, strictSSL) {
 	// only encode the URL if it doesn't already have encoded characters
 	const url = (/%[\da-f]{2}/i).test(imageUrl) ? imageUrl : encodeURI(imageUrl);
 
@@ -146,7 +148,8 @@ async function loadImageFilePromise(imageUrl) {
 			encoding: null, // preserves binary encoding
 			headers: {
 				'User-Agent': 'wordpress-export-to-markdown'
-			}
+			},
+			strictSSL: strictSSL
 		});
 	} catch (ex) {
 		if (ex.name === 'StatusCodeError') {