diff --git a/build.sbt b/build.sbt
index 09b94d0..e0f5676 100644
--- a/build.sbt
+++ b/build.sbt
@@ -47,6 +47,10 @@ organizationName := "Lars Edenbrandt"
 startYear := Some(2018)
 licenses += ("Apache-2.0", new URL("https://www.apache.org/licenses/LICENSE-2.0.txt"))
 
+// coverage
+
+coverageExcludedPackages := "Tag.*;UID.*;Dictionary.*"
+
 // publish
 publishMavenStyle := true