diff --git a/sci b/sci
index 46d1c087..842c8cbb 160000
--- a/sci
+++ b/sci
@@ -1 +1 @@
-Subproject commit 46d1c0876c700e5ce05884a633b73a18071277b6
+Subproject commit 842c8cbb520fc9449f21b4f19c3838ed654a76c1
diff --git a/src/babashka/impl/classes.clj b/src/babashka/impl/classes.clj
index b33b30f6..987f5558 100644
--- a/src/babashka/impl/classes.clj
+++ b/src/babashka/impl/classes.clj
@@ -398,6 +398,7 @@
                       clojure.lang.PersistentTreeSet
                       clojure.lang.PersistentVector
                       clojure.lang.Ratio
+                      clojure.lang.ReaderConditional
                       clojure.lang.Repeat
                       clojure.lang.Reversible
                       clojure.lang.Symbol