diff --git a/build.sbt b/build.sbt
index aea8e05d48..1fb9e1cdbe 100644
--- a/build.sbt
+++ b/build.sbt
@@ -106,7 +106,7 @@ val WebJarDependencies = Seq(
   "org.webjars"     % "clipboard.js"     % "2.0.11",
   "org.webjars.npm" % "codemirror"       % "5.65.20",
   "org.webjars.npm" % "dragula"          % "3.7.3",
-  "org.webjars.npm" % "fflate"           % "0.6.10",
+  "org.webjars.npm" % "fflate"           % "0.8.3",
   "org.webjars.npm" % "jquery"           % "3.6.1",
   "org.webjars.npm" % "jquery.fancytree" % "2.21.0",
   "org.webjars.npm" % "mousetrap"        % "1.6.5",