diff --git a/DESCRIPTION b/DESCRIPTION
index 6fbea42..b897fb7 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -2,12 +2,12 @@ Package: yaml
 Type: Package
 Title: Methods to Convert R Data to YAML and Back
 Date: 2023-11-28
-Version: 2.3.8
+Version: 2.3.9
 Suggests: RUnit
 Author: Shawn P Garbett [aut], Jeremy Stephens [aut, cre], Kirill Simonov [aut], Yihui Xie [ctb],
   Zhuoer Dong [ctb], Hadley Wickham [ctb], Jeffrey Horner [ctb], reikoch [ctb],
   Will Beasley [ctb], Brendan O'Connor [ctb], Gregory R. Warnes [ctb],
-  Michael Quinn [ctb], Zhian N. Kamvar [ctb]
+  Michael Quinn [ctb], Zhian N. Kamvar [ctb], Charlie Gao [ctb]
 Maintainer: Shawn Garbett <shawn.garbett@vumc.org>
 License: BSD_3_clause + file LICENSE
 Description: Implements the 'libyaml' 'YAML' 1.1 parser and emitter
diff --git a/VERSION b/VERSION
index bc4abe8..5aa7c52 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.8
+2.3.9
diff --git a/src/r_emit.c b/src/r_emit.c
index 5b52cdd..7c6912d 100644
--- a/src/r_emit.c
+++ b/src/r_emit.c
@@ -11,6 +11,22 @@ typedef struct {
   size_t capa;
 } s_emitter_output;
 
+#if R_VERSION < R_Version(4, 5, 0)
+
+# define R_ClosureFormals(x) FORMALS(x)
+# define R_ClosureBody(x) BODY(x)
+# define R_ClosureEnv(x) CLOENV(x)
+
+static inline SEXP R_mkClosure(SEXP formals, SEXP body, SEXP env) {
+  SEXP fun = Rf_allocSExp(CLOSXP);
+  SET_FORMALS(fun, formals);
+  SET_BODY(fun, body);
+  SET_CLOENV(fun, env);
+  return fun;
+}
+
+#endif
+
 static SEXP Ryaml_deparse_function(SEXP s_obj)
 {
   SEXP s_new_obj = NULL, s_call = NULL, s_result = NULL, s_chr = NULL;
@@ -20,10 +36,7 @@ static SEXP Ryaml_deparse_function(SEXP s_obj)
   /* Copy function without any attributes */
   if (TYPEOF(s_obj) == CLOSXP) {
     PROTECT(s_obj);
-    PROTECT(s_new_obj = allocSExp(CLOSXP));
-    SET_FORMALS(s_new_obj, FORMALS(s_obj));
-    SET_BODY(s_new_obj, BODY(s_obj));
-    SET_CLOENV(s_new_obj, CLOENV(s_obj));
+    PROTECT(s_new_obj = R_mkClosure(R_ClosureFormals(s_obj), R_ClosureBody(s_obj), R_ClosureEnv(s_obj)));
     SET_OBJECT(s_new_obj, OBJECT(s_obj));
     UNPROTECT(2);
     s_obj = s_new_obj;
diff --git a/src/r_ext.h b/src/r_ext.h
index 040354e..fbba3e4 100644
--- a/src/r_ext.h
+++ b/src/r_ext.h
@@ -12,6 +12,7 @@
 #include <limits.h>
 #include "R.h"
 #include "Rdefines.h"
+#include "Rversion.h"
 #include "R_ext/Rdynload.h"
 #include "R_ext/Parse.h"
 #include "R_ext/Print.h"