diff --git a/firefox.spec b/firefox.spec
index 0ba3b6a..7d19b69 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -90,7 +90,7 @@ ExcludeArch: armv7hl
 %if %{?system_nss}
 %global nspr_version 4.21
 %global nspr_build_version %{nspr_version}
-%global nss_version 3.55
+%global nss_version 3.56
 %global nss_build_version %{nss_version}
 %endif