diff --git a/build.property b/build.property
index 2e84c5b3f..81d7509df 100644
--- a/build.property
+++ b/build.property
@@ -2,7 +2,7 @@
   "version": "1.9.1-1",
   "python": "3.6.0",
   "build_requires": {"cntoolkit": ["release","4.5.1-1"],
-                     "cnnl":["release","2.2.0-1"],
+                     "cnnl":["release","2.2.1-1"],
                      "driver": "6.0.3",
                      "eigen3": "3.4.0",
                      "libxml2": "2.9.13",