diff --git a/Gemfile.lock b/Gemfile.lock
index 1db2fbecb2..d00b3e6137 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -80,7 +80,7 @@ GEM
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
-    kramdown-plantuml (1.3.2)
+    kramdown-plantuml (1.3.3)
       htmlentities (~> 4)
       kramdown (~> 2.3)
       kramdown-parser-gfm (~> 1.1)