diff --git a/nodejs-memoizee.spec b/nodejs-memoizee.spec
index e28a04a..1ef063d 100644
--- a/nodejs-memoizee.spec
+++ b/nodejs-memoizee.spec
@@ -35,6 +35,10 @@ Memoize/cache function results
 %setup -q -n package
 
 %nodejs_fixdep es6-weak-map ~2.0.1
+# allow newer version of npm(es6-weak-map)
+
+%nodejs_fixdep d "<=2.0.0"
+# allow either the 0.1.x or 1.x.x series of npm(d)
 
 
 %build