diff --git a/project/V.scala b/project/V.scala
index 75ee256f529..7181afffdaf 100644
--- a/project/V.scala
+++ b/project/V.scala
@@ -24,7 +24,7 @@ object V {
   val coursier = "2.1.12"
   // changing coursier interfaces version may be not binary compatible.
   // After each update of coursier interfaces, remember to bump the version in dotty repository.
-  val coursierInterfaces = "1.0.20"
+  val coursierInterfaces = "1.0.21"
   val debugAdapter = "4.2.1"
   val genyVersion = "1.0.0"
   val gitter8Version = "0.16.2"