diff --git a/packages/cmk-crypto/BUILD b/packages/cmk-crypto/BUILD
index d6978004378..7f9e44a34d7 100644
--- a/packages/cmk-crypto/BUILD
+++ b/packages/cmk-crypto/BUILD
@@ -59,6 +59,7 @@ py_test(
         requirement("cryptography"),
         requirement("pytest"),
         requirement("time-machine"),
+        requirement("python-dateutil"),
     ],
 )