diff --git a/core/src/de/tobiasroeser/mill/osgi/OsgiHeaders.scala b/core/src/de/tobiasroeser/mill/osgi/OsgiHeaders.scala
index a9b44b9..e2f48c0 100644
--- a/core/src/de/tobiasroeser/mill/osgi/OsgiHeaders.scala
+++ b/core/src/de/tobiasroeser/mill/osgi/OsgiHeaders.scala
@@ -29,9 +29,9 @@ case class OsgiHeaders(
     `Fragment-Host`: Option[String] = None,
     `Import-Package`: Seq[String] = Seq.empty,
     `Import-Service`: Seq[String] = Seq.empty,
-    `Provide-Capability`: Option[String] = None,
+    `Provide-Capability`: Seq[String] = Seq.empty,
     `Require-Bundle`: Seq[String] = Seq.empty,
-    `Require-Capability`: Option[String] = None,
+    `Require-Capability`: Seq[String] = Seq.empty,
     `Service-Component`: Option[String] = None,
     `Private-Package`: Seq[String] = Seq.empty,
     `Ignore-Package`: Seq[String] = Seq.empty,