diff --git a/spec/VISSv3.0_PayloadEncoding.html b/spec/VISSv3.0_PayloadEncoding.html
index 055a77e..e332712 100644
--- a/spec/VISSv3.0_PayloadEncoding.html
+++ b/spec/VISSv3.0_PayloadEncoding.html
@@ -186,7 +186,7 @@ <h2>Protobuf Schema Definition</h2>
 
             <figure>
               <pre><code>
-                <embed type="text/protobuf" src="resources/vissv3.0.proto" width="800" height="500">
+                <embed type="text/protobuf" src="resources/vissv3.0.proto.txt" width="800" height="500">
               </code></pre>
               <figcaption><span class="fig-title">Protobuf schema file for VISS version 3.0</span></figcaption>
             </figure>
diff --git a/spec/resources/vissv3.0.proto b/spec/resources/vissv3.0.proto.txt
similarity index 100%
rename from spec/resources/vissv3.0.proto
rename to spec/resources/vissv3.0.proto.txt