diff --git a/build.sc b/build.sc
index f48f6c47ba3..079929972ac 100644
--- a/build.sc
+++ b/build.sc
@@ -121,7 +121,7 @@ object Deps {
   val log4j2Core = ivy"org.apache.logging.log4j:log4j-core:2.20.0"
   val osLib = ivy"com.lihaoyi::os-lib:0.9.1"
   val pprint = ivy"com.lihaoyi::pprint:0.8.1"
-  val mainargs = ivy"com.lihaoyi::mainargs:0.5.0"
+  val mainargs = ivy"com.lihaoyi::mainargs:0.5.1"
   val millModuledefsVersion = "0.10.9"
   val millModuledefsString = s"com.lihaoyi::mill-moduledefs:${millModuledefsVersion}"
   val millModuledefs = ivy"${millModuledefsString}"