diff --git a/build.sbt b/build.sbt
index 0b4f5cd..babab01 100644
--- a/build.sbt
+++ b/build.sbt
@@ -5,7 +5,7 @@ organization     := "io.github.manuzhang"
 libraryDependencies ++= Seq(
   "com.lihaoyi" %% "os-lib" % "0.7.8",
   "com.lihaoyi" %% "scalatags" % "0.8.6",
-  "com.vladsch.flexmark" % "flexmark-all" % "0.61.34",
+  "com.vladsch.flexmark" % "flexmark-all" % "0.64.0",
   "org.rogach" %% "scallop" % "4.1.0",
   "com.typesafe.scala-logging" %% "scala-logging" % "3.9.4",
   "ch.qos.logback" % "logback-classic" % "1.2.11"