diff --git a/core/shared/src/main/scala/coursier/util/Config.scala b/core/shared/src/main/scala/coursier/util/Config.scala
index ac6587df4..25fdaae2c 100644
--- a/core/shared/src/main/scala/coursier/util/Config.scala
+++ b/core/shared/src/main/scala/coursier/util/Config.scala
@@ -42,7 +42,7 @@ object Config {
       .groupBy(_.copy(configuration = ""))
       .map {
         case (dep, l) =>
-          dep.copy(configuration = l.map(_.configuration).mkString(","))
+          dep.copy(configuration = l.map(_.configuration).mkString(";"))
       }
       .toSet
 
diff --git a/core/shared/src/main/scala/coursier/util/Print.scala b/core/shared/src/main/scala/coursier/util/Print.scala
index bbde82229..bdd380b06 100644
--- a/core/shared/src/main/scala/coursier/util/Print.scala
+++ b/core/shared/src/main/scala/coursier/util/Print.scala
@@ -32,7 +32,7 @@ object Print {
       .groupBy(_.copy(configuration = ""))
       .toVector
       .map { case (k, l) =>
-        k.copy(configuration = l.toVector.map(_.configuration).sorted.mkString(","))
+        k.copy(configuration = l.toVector.map(_.configuration).sorted.mkString(";"))
       }
       .sortBy { dep =>
         (dep.module.organization, dep.module.name, dep.module.toString, dep.version)