diff --git a/src/babashka/impl/classes.clj b/src/babashka/impl/classes.clj
index cff89023..addcc391 100644
--- a/src/babashka/impl/classes.clj
+++ b/src/babashka/impl/classes.clj
@@ -21,9 +21,12 @@
           java.io.InputStream
           java.io.IOException
           java.io.OutputStream
+          java.io.PrintWriter
+          java.io.PushbackReader
           java.io.Reader
           java.io.StringReader
           java.io.StringWriter
+          java.io.Writer
           java.lang.ArithmeticException
           java.lang.AssertionError
           java.lang.Boolean