diff --git a/holoviews/core/data/ibis.py b/holoviews/core/data/ibis.py
index cb35db2a90..2041a57d2d 100644
--- a/holoviews/core/data/ibis.py
+++ b/holoviews/core/data/ibis.py
@@ -12,13 +12,13 @@
 from .util import cached
 
 
-@lru_cache()
+@lru_cache
 def ibis_version():
     import ibis
     return Version(ibis.__version__)
 
 
-@lru_cache()
+@lru_cache
 def ibis4():
     return ibis_version() >= Version("4.0")