diff --git a/pandoc_plantuml_filter.py b/pandoc_plantuml_filter.py
index a2a7c3c..c675c8e 100755
--- a/pandoc_plantuml_filter.py
+++ b/pandoc_plantuml_filter.py
@@ -36,7 +36,8 @@ def plantuml(key, value, format_, _):
             caption, typef, keyvals = get_caption(keyvals)
 
             filename = get_filename4code("plantuml", code)
-            filetype = get_extension(format_, "png", html="svg", latex="png")
+            filetype = get_extension(format_, "png", html="svg", latex="png",
+                                     revealjs="svg")
 
             src = filename + '.uml'
             dest = filename + '.' + filetype