diff --git a/OOMAnalyser.html b/OOMAnalyser.html
index 8f8bd4a..06f7e6e 100644
--- a/OOMAnalyser.html
+++ b/OOMAnalyser.html
@@ -54,7 +54,7 @@
             display: inline-block;
         }
 
-        .mem-usage__svg {
+        .js-mem-usage__svg {
             display: block;
             max-height: 200px;
         }
diff --git a/OOMAnalyser.py b/OOMAnalyser.py
index 8846a6b..809c3de 100644
--- a/OOMAnalyser.py
+++ b/OOMAnalyser.py
@@ -1125,7 +1125,7 @@ Killed process 6576 (java) total-vm:33914892kB, anon-rss:20629004kB, file-rss:0k
         length_factor = 4
         overall_height = bar_height + label_height
         overall_width = 100 * length_factor
-        css_class = 'mem-usage__svg'
+        css_class = 'js-mem-usage__svg'
 
         svg = self.svg_create_element(overall_height, overall_width, css_class)