diff --git a/sci b/sci
index 34bc45b0..e4cfa161 160000
--- a/sci
+++ b/sci
@@ -1 +1 @@
-Subproject commit 34bc45b0531b52ca2a7a8d8b21b0d86f30f697cf
+Subproject commit e4cfa161b06fa3cfe2c18342aaf8d7ffe2d5ae9d
diff --git a/src/babashka/impl/classes.clj b/src/babashka/impl/classes.clj
index d81a62ab..dd1cb527 100644
--- a/src/babashka/impl/classes.clj
+++ b/src/babashka/impl/classes.clj
@@ -111,11 +111,13 @@
           java.io.StringReader
           java.io.StringWriter
           java.io.Writer
+          java.lang.Appendable
           java.lang.ArithmeticException
           java.lang.AssertionError
           java.lang.Boolean
           java.lang.Byte
           java.lang.Character
+          java.lang.CharSequence
           java.lang.Class
           java.lang.ClassNotFoundException
           java.lang.Comparable
@@ -199,6 +201,7 @@
           java.security.MessageDigest
           java.security.DigestInputStream
           java.security.SecureRandom
+          java.sql.Date
           java.text.ParseException
           ~@(when features/java-time?
               `[java.time.format.DateTimeFormatter
@@ -329,6 +332,9 @@
                       clojure.lang.Sequential
                       clojure.lang.Seqable
                       clojure.lang.Volatile
+                      java.util.concurrent.atomic.AtomicInteger
+                      java.util.concurrent.atomic.AtomicLong
+                      java.util.Collection
                       java.util.List
                       java.util.Iterator
                       java.util.Map$Entry]
diff --git a/src/babashka/impl/pprint.clj b/src/babashka/impl/pprint.clj
index 073c2f7c..e598c0ae 100644
--- a/src/babashka/impl/pprint.clj
+++ b/src/babashka/impl/pprint.clj
@@ -1,8 +1,7 @@
 (ns babashka.impl.pprint
   {:no-doc true}
   (:require [clojure.pprint :as pprint]
-            [sci.core :as sci]
-            [sci.impl.vars :as vars]))
+            [sci.core :as sci]))
 
 (defonce patch-option-table
   (alter-var-root #'pprint/write-option-table
@@ -48,10 +47,8 @@
 
 (alter-var-root #'pprint/write (constantly new-write))
 
-(def pprint-ns (vars/->SciNamespace 'clojure.pprint nil))
+(def pprint-ns (sci/create-ns 'clojure.pprint nil))
 
-(def print-right-margin
-  (sci/new-dynamic-var 'print-right-margin pprint/*print-right-margin* {:ns pprint-ns}))
 
 (defn print-table
   "Prints a collection of maps in a textual table. Prints table headings
@@ -62,13 +59,20 @@
    (binding [*out* @sci/out]
      (pprint/print-table ks rows))))
 
+(def print-right-margin
+  (sci/new-dynamic-var '*print-right-margin* pprint/*print-right-margin* {:ns pprint-ns}))
+
+(def print-pprint-dispatch
+  (sci/new-dynamic-var '*print-pprint-dispatch* pprint/*print-pprint-dispatch* {:ns pprint-ns}))
+
 (defn pprint
   "Pretty print object to the optional output writer. If the writer is not provided,
   print the object to the currently bound value of *out*."
   ([s]
    (pprint s @sci/out))
   ([s writer]
-   (binding [pprint/*print-right-margin* @print-right-margin]
+   (binding [pprint/*print-right-margin* @print-right-margin
+             #_#_pprint/*print-pprint-dispatch* @print-pprint-dispatch]
      (pprint/pprint s writer))))
 
 (def pprint-namespace
@@ -80,4 +84,10 @@
    ;; we alter-var-root-ed write above, so this should copy the right function
    'write (sci/copy-var pprint/write pprint-ns)
    'simple-dispatch (sci/copy-var pprint/simple-dispatch pprint-ns)
+   ;; 'formatter-out (sci/copy-var pprint/formatter-out pprint-ns)
+   ;; 'cached-compile (sci/copy-var pprint/cached-compile pprint-ns) #_(sci/new-var 'cache-compile @#'pprint/cached-compile (meta @#'pprint/cached-compile))
+   ;; 'init-navigator (sci/copy-var pprint/init-navigator pprint-ns)
+   ;; 'execute-format (sci/copy-var pprint/execute-format pprint-ns)
+   ;; 'with-pprint-dispatch (sci/copy-var pprint/with-pprint-dispatch pprint-ns)
+   ;; '*print-pprint-dispatch* print-pprint-dispatch
    })
diff --git a/src/babashka/main.clj b/src/babashka/main.clj
index b6fcdb11..b96ae97c 100644
--- a/src/babashka/main.clj
+++ b/src/babashka/main.clj
@@ -409,13 +409,15 @@ Use bb run --help to show this help output.
                             @(resolve 'babashka.impl.selmer/selmer-validator-namespace))))
 
 (def imports
-  '{ArithmeticException java.lang.ArithmeticException
+  '{Appendable java.lang.Appendable
+    ArithmeticException java.lang.ArithmeticException
     AssertionError java.lang.AssertionError
     BigDecimal java.math.BigDecimal
     BigInteger java.math.BigInteger
     Boolean java.lang.Boolean
     Byte java.lang.Byte
     Character java.lang.Character
+    CharSequence java.lang.CharSequence
     Class java.lang.Class
     ClassNotFoundException java.lang.ClassNotFoundException
     Comparable java.lang.Comparable