diff --git a/reflection.json b/reflection.json
index adc8aa6f..3038d896 100644
--- a/reflection.json
+++ b/reflection.json
@@ -1,4 +1,9 @@
 [ {
+  "name" : "clojure.lang.Delay",
+  "allPublicMethods" : true,
+  "allPublicFields" : true,
+  "allPublicConstructors" : true
+}, {
   "name" : "clojure.lang.ExceptionInfo",
   "allPublicMethods" : true,
   "allPublicFields" : true,
diff --git a/sci b/sci
index abe867b9..acaca5fb 160000
--- a/sci
+++ b/sci
@@ -1 +1 @@
-Subproject commit abe867b9fbc01828728e2216f17f879cc2e9e2ac
+Subproject commit acaca5fb54e7b2f16ec87f32b045e88a9539272b
diff --git a/src/babashka/impl/classes.clj b/src/babashka/impl/classes.clj
index e24d2015..b8de9995 100644
--- a/src/babashka/impl/classes.clj
+++ b/src/babashka/impl/classes.clj
@@ -4,7 +4,8 @@
    [cheshire.core :as json]))
 
 (def classes
-  {:default-classes '[clojure.lang.ExceptionInfo
+  {:default-classes '[clojure.lang.Delay
+                      clojure.lang.ExceptionInfo
                       clojure.lang.LineNumberingPushbackReader
                       java.io.BufferedReader
                       java.io.BufferedWriter