diff --git a/Makefile b/Makefile
index ad18d69a9..fc1168092 100644
--- a/Makefile
+++ b/Makefile
@@ -70,7 +70,7 @@ license::
 	--ignore github.com/modern-go/reflect2 \
 	--ignore github.com/prometheus/client_golang \
 	--ignore golang.org/x \
-	--allowed_licenses=MIT,Apache-2.0,BSD-0-Clause,BSD-2-Clause,BSD-3-Clause,LGPL-2.1,EPL-2.0,MPL-2.0 \
+	--allowed_licenses=MIT,Apache-2.0,BSD-0-Clause,BSD-2-Clause,BSD-3-Clause,ISC,LGPL-2.1,EPL-2.0,MPL-2.0 \
 	./...
 
 license-ui::