diff --git a/sip/siplib/sip.h b/sip/siplib/sip.h
index bcb53ab2..5dc022ee 100644
--- a/sip/siplib/sip.h
+++ b/sip/siplib/sip.h
@@ -1,7 +1,7 @@
 /*
  * The SIP module interface.
  *
- * Copyright (c) 2018 Riverbank Computing Limited <info@riverbankcomputing.com>
+ * Copyright (c) 2020 Riverbank Computing Limited <info@riverbankcomputing.com>
  *
  * This file is part of SIP.
  *
@@ -54,8 +54,8 @@ extern "C" {
 /*
  * Define the SIP version number.
  */
-#define SIP_VERSION         0x041313
-#define SIP_VERSION_STR     "4.19.19"
+#define SIP_VERSION         0x041317
+#define SIP_VERSION_STR     "4.19.23"
 
 
 /*
diff --git a/sip/siplib/siplib.c b/sip/siplib/siplib.c
index e2c90784..a31ddbec 100644
--- a/sip/siplib/siplib.c
+++ b/sip/siplib/siplib.c
@@ -1,7 +1,7 @@
 /*
  * SIP library code.
  *
- * Copyright (c) 2019 Riverbank Computing Limited <info@riverbankcomputing.com>
+ * Copyright (c) 2020 Riverbank Computing Limited <info@riverbankcomputing.com>
  *
  * This file is part of SIP.
  *
@@ -9338,6 +9338,7 @@ static PyObject *sip_api_get_reference(PyObject *self, int key)
         return NULL;
 
     obj = PyDict_GetItem(dict, key_obj);
+    Py_DECREF(key_obj);
     Py_XINCREF(obj);
 
     return obj;
@@ -11320,6 +11321,11 @@ static SIP_SSIZE_T sipSimpleWrapper_getcharbuffer(sipSimpleWrapper *self,
  */
 static void sipSimpleWrapper_dealloc(sipSimpleWrapper *self)
 {
+    PyObject *error_type, *error_value, *error_traceback;
+
+    /* Save the current exception, if any. */
+    PyErr_Fetch(&error_type, &error_value, &error_traceback);
+
     forgetObject(self);
 
     /*
@@ -11331,6 +11337,9 @@ static void sipSimpleWrapper_dealloc(sipSimpleWrapper *self)
 
     /* Call the standard super-type dealloc. */
     PyBaseObject_Type.tp_dealloc((PyObject *)self);
+
+    /* Restore the saved exception. */
+    PyErr_Restore(error_type, error_value, error_traceback);
 }
 
 
@@ -11727,6 +11736,11 @@ static int sipWrapper_clear(sipWrapper *self)
  */
 static void sipWrapper_dealloc(sipWrapper *self)
 {
+    PyObject *error_type, *error_value, *error_traceback;
+
+    /* Save the current exception, if any. */
+    PyErr_Fetch(&error_type, &error_value, &error_traceback);
+
     /*
      * We can't simply call the super-type because things have to be done in a
      * certain order.  The first thing is to get rid of the wrapped instance.
@@ -11737,6 +11751,9 @@ static void sipWrapper_dealloc(sipWrapper *self)
 
     /* Skip the super-type's dealloc. */
     PyBaseObject_Type.tp_dealloc((PyObject *)self);
+
+    /* Restore the saved exception. */
+    PyErr_Restore(error_type, error_value, error_traceback);
 }