diff --git a/css/cdm.css b/css/cdm.css
index 516242bdb..0af07076f 100644
--- a/css/cdm.css
+++ b/css/cdm.css
@@ -264,6 +264,7 @@ div.cdmContentInner p {
 
 div.cdmContentInner iframe {
 	min-width : 50%;
+	max-width : 98%;
 }
 
 div.cdmHeader span.author {
diff --git a/css/tt-rss.css b/css/tt-rss.css
index 97f787c81..38c255950 100644
--- a/css/tt-rss.css
+++ b/css/tt-rss.css
@@ -1012,6 +1012,7 @@ div.postContent p {
 
 div.postContent iframe {
 	min-width : 50%;
+	max-width : 98%;
 }
 
 div.postHeader span.author {