diff --git a/src/templates/tx.html b/src/templates/tx.html
index a344899..2c54659 100644
--- a/src/templates/tx.html
+++ b/src/templates/tx.html
@@ -2,7 +2,7 @@
 <div>
 
     <H4>Tx hash: {{tx_hash}}</H4>
-    <H3>Tx public key: {{tx_pub_key}}</H3>
+    <H5>Tx public key: {{tx_pub_key}}</H5>
 
 
     {{#have_prev_hash}}