diff --git a/lib/CompilationRequest.js b/lib/CompilationRequest.js
index 46ba51d..258020c 100644
--- a/lib/CompilationRequest.js
+++ b/lib/CompilationRequest.js
@@ -102,7 +102,10 @@ class CompilationRequest {
 }
 
 function validateCommand(command) {
-    if (command !== 'pdflatex' && command !== 'xelatex' && command !== 'lualatex')
+    //TODO: all possible commands should be fetched from the host on
+    // service start.
+    if (command !== 'pdflatex' && command !== 'xelatex' && command !== 'lualatex' &&
+        command !== 'platex' && command !== 'uplatex')
         return `Unknown command: ${command}`;
     return null;
 }
diff --git a/public/index.html b/public/index.html
index 1278d31..037570c 100644
--- a/public/index.html
+++ b/public/index.html
@@ -73,6 +73,8 @@ <h6>
                     <option value="pdflatex">pdflatex</option>
                     <option value="xelatex">xelatex</option>
                     <option value="lualatex">lualatex</option>
+                    <option value="platex">platex</option>
+                    <option value="uplatex">uplatex</option>
                   </select>
               </div>
             </div>