diff --git a/packages/fcalclusterer/package.py b/packages/fcalclusterer/package.py
index a8e54531..1279f70a 100644
--- a/packages/fcalclusterer/package.py
+++ b/packages/fcalclusterer/package.py
@@ -17,6 +17,10 @@ class Fcalclusterer(CMakePackage, Ilcsoftpackage):
     maintainers = ["vvolkl"]
 
     version("master", branch="master")
+    version(
+        "1.1",
+        sha256="4310adaaf8171b8aec544237d957e3f8cd5ca6c8c27af4abd18923685466c51f",
+    )
     version(
         "1.0.6",
         sha256="e1fcd34836f3feb2c6788a577f8b507873cfcf1b3b780ecfe3dca553de14f93b",