diff --git a/src/main/webapp/assets/common/css/gitbucket.css b/src/main/webapp/assets/common/css/gitbucket.css
index 9cb053c..d284e57 100644
--- a/src/main/webapp/assets/common/css/gitbucket.css
+++ b/src/main/webapp/assets/common/css/gitbucket.css
@@ -593,6 +593,7 @@
   border: none;
   background-color: white;
   padding-left: 20px;
+  font-size: 12px;
 }
 
 #readme {
@@ -838,6 +839,8 @@
 /* Diff */
 /****************************************************************************/
 table.inlinediff {
+    font-size: 12px;
+    font-family: Monaco, Menlo, Consolas, "Courier New", monospace;
     width: 100%;
 }