diff --git a/src/snapshot.ts b/src/snapshot.ts
index 37c97887..5f76994e 100644
--- a/src/snapshot.ts
+++ b/src/snapshot.ts
@@ -53,7 +53,7 @@ function extractOrigin(url: string): string {
 
 const URL_IN_CSS_REF = /url\((?:'([^']*)'|"([^"]*)"|([^)]*))\)/gm;
 const RELATIVE_PATH = /^(?!www\.|(?:http|ftp)s?:\/\/|[A-Za-z]:\\|\/\/).*/;
-const DATA_URI = /^(data:)([\w\/\+]+);(charset=[\w-]+|base64).*,(.*)/gi;
+const DATA_URI = /^(data:)([\w\/\+\-]+);(charset=[\w-]+|base64).*,(.*)/i;
 export function absoluteToStylesheet(cssText: string, href: string): string {
   return cssText.replace(URL_IN_CSS_REF, (origin, path1, path2, path3) => {
     const filePath = path1 || path2 || path3;
diff --git a/test/snapshot.test.ts b/test/snapshot.test.ts
index c2f736f9..36d697ce 100644
--- a/test/snapshot.test.ts
+++ b/test/snapshot.test.ts
@@ -63,6 +63,12 @@ describe('absolute url to stylesheet', () => {
     expect(
       absoluteToStylesheet('url(data:image/gif;base64,ABC)', href),
     ).to.equal('url(data:image/gif;base64,ABC)');
+    expect(
+      absoluteToStylesheet(
+        'url(data:application/font-woff;base64,d09GMgABAAAAAAm)',
+        href,
+      ),
+    ).to.equal('url(data:application/font-woff;base64,d09GMgABAAAAAAm)');
   });
 
   it('can handle empty path', () => {