diff --git a/lib/greenmail/BUILD b/lib/greenmail/BUILD
index 5d8e1d6..9cbd0eb 100644
--- a/lib/greenmail/BUILD
+++ b/lib/greenmail/BUILD
@@ -4,14 +4,14 @@
 
 java_library(
     name = "javax-activation",
-    testonly = 1,
+    testonly = True,
     data = ["//lib:LICENSE-DO_NOT_DISTRIBUTE"],
     exports = ["@javax-activation//jar"],
 )
 
 java_library(
     name = "greenmail",
-    testonly = 1,
+    testonly = True,
     data = ["//lib:LICENSE-Apache2.0"],
     exports = ["@greenmail//jar"],
     runtime_deps = select({