diff --git a/core-blocks/image/style.scss b/core-blocks/image/style.scss
index 9797196434499d..97a4961a1e80fd 100644
--- a/core-blocks/image/style.scss
+++ b/core-blocks/image/style.scss
@@ -1,5 +1,10 @@
 .wp-block-image {
 	width: fit-content;
+    max-width: 100%;
+
+	img {
+	    max-width: 100%;
+	}
 
 	&.aligncenter {
 		display: block;
diff --git a/core-blocks/video/style.scss b/core-blocks/video/style.scss
index 1fbdf19720705a..24e8278cc4a7b5 100644
--- a/core-blocks/video/style.scss
+++ b/core-blocks/video/style.scss
@@ -1,4 +1,8 @@
 .wp-block-video {
+	video {
+		max-width: 100%;
+	}
+
 	&.aligncenter {
 		text-align: center;
 	}