diff --git a/lib/image.js b/lib/image.js
index e219db8c..416664d2 100644
--- a/lib/image.js
+++ b/lib/image.js
@@ -16,7 +16,7 @@ class PDFImage {
       data = Buffer.from(new Uint8Array(src));
     } else {
       let match;
-      if ((match = /^data:.+;base64,(.*)$/.exec(src))) {
+      if ((match = /^data:.+?;base64,(.*)$/.exec(src))) {
         data = Buffer.from(match[1], 'base64');
       } else {
         data = fs.readFileSync(src);
diff --git a/lib/mixins/attachments.js b/lib/mixins/attachments.js
index ef245d3d..862fd9a8 100644
--- a/lib/mixins/attachments.js
+++ b/lib/mixins/attachments.js
@@ -32,7 +32,7 @@ export default {
       data = Buffer.from(new Uint8Array(src));
     } else {
       let match;
-      if ((match = /^data:(.*);base64,(.*)$/.exec(src))) {
+      if ((match = /^data:(.*?);base64,(.*)$/.exec(src))) {
         if (match[1]) {
           refBody.Subtype = match[1].replace('/', '#2F');
         }