diff --git a/build.sbt b/build.sbt
index f131eead..e42b8e2b 100644
--- a/build.sbt
+++ b/build.sbt
@@ -222,7 +222,7 @@ lazy val extras =
         libraryDependencies ++=
             Seq(
                 // Command-line handling:
-                "org.rogach" %% "scallop" % "4.0.3",
+                "org.rogach" %% "scallop" % "4.0.4",
                 // Language server protocol:
                 "org.eclipse.lsp4j" % "org.eclipse.lsp4j" % "0.10.0",
                 "com.google.code.gson" % "gson" % "2.8.9",