diff --git a/build.py b/build.py
index d1facd4a..fa9520c2 100755
--- a/build.py
+++ b/build.py
@@ -87,9 +87,9 @@ wxICON = 'packaging/docset/mondrian.png'
 
 # Some tools will be downloaded for the builds. These are the versions and
 # MD5s of the tool binaries currently in use.
-sipCurrentVersion = '4.19.19'
+sipCurrentVersion = '4.19.23'
 sipMD5 = {
-    'darwin'   : '3309e69f2341f11bac263d7faea19616',
+    'darwin'   : 'cbd84be2a54eee9a85d53b2b464c9e62',
     'win32'    : 'fd8be5c5fa369a848e907acad6879846',
     'linux32'  : 'd0271b47695e74483f0c0d54f24819d5',
     'linux64'  : '355410a19846768cdeb53efe249aabdb',
diff --git a/wx/include/wxPython/sip.h b/wx/include/wxPython/sip.h
index bcb53ab2..5dc022ee 100644
--- a/wx/include/wxPython/sip.h
+++ b/wx/include/wxPython/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"
 
 
 /*