diff --git a/css/cdm.css b/css/cdm.css
index eb4a2243c..560c68fdd 100644
--- a/css/cdm.css
+++ b/css/cdm.css
@@ -61,6 +61,15 @@ div.cdmContentInner img {
 	height : auto;
 }
 
+div.cdmContentInner h1 {
+	font-size : 16px;
+}
+
+div.cdmContentInner h2,
+div.cdmContentInner h3 {
+	font-size : 14px;
+}
+
 div.cdmFooter {
 	padding : 5px;
 	font-weight : normal;
diff --git a/css/tt-rss.css b/css/tt-rss.css
index 506780908..61c1db0d8 100644
--- a/css/tt-rss.css
+++ b/css/tt-rss.css
@@ -943,6 +943,15 @@ span.collapseBtn {
 	cursor : pointer;
 }
 
+div.postContent h1 {
+	font-size : 16px;
+}
+
+div.postContent h2,
+div.postContent h3 {
+	font-size : 14px;
+}
+
 div.postContent p {
 	max-width : 650px;
 	-webkit-hyphens: auto;