diff --git a/client/src/document/index.scss b/client/src/document/index.scss
index f7af984e23ce..3607cc039a88 100644
--- a/client/src/document/index.scss
+++ b/client/src/document/index.scss
@@ -87,6 +87,8 @@
     background: #fff;
     border: 1px solid var(--border-primary) !important;
     border-radius: var(--elem-radius);
+    /* Required to prevent the border from scaling images, making them look blurry. */
+    box-sizing: content-box;
     /* Required for alt texts. */
     color: #1b1b1b;
     display: inline-block;