diff --git a/src/3rdParty/PyCXX/CXX/Python3/Objects.hxx b/src/3rdParty/PyCXX/CXX/Python3/Objects.hxx
index 4894ba9c28..0ed3fc969b 100644
--- a/src/3rdParty/PyCXX/CXX/Python3/Objects.hxx
+++ b/src/3rdParty/PyCXX/CXX/Python3/Objects.hxx
@@ -1787,8 +1787,8 @@ namespace Py
     typedef std::basic_string<Py_UNICODE> unicodestring;
     extern Py_UNICODE unicode_null_string[1];
 #endif
-    typedef std::basic_string<Py_UCS4> ucs4string;
-    extern Py_UCS4 ucs4_null_string[1];
+    typedef std::basic_string<char32_t> ucs4string;
+    extern char32_t ucs4_null_string[1];
 
     class PYCXX_EXPORT Byte: public Object
     {
@@ -2152,13 +2152,13 @@ namespace Py
         // Need these c'tors becuase Py_UNICODE is 2 bytes
         // User may use "int" or "unsigned int" as the unicode type
         String( const unsigned int *s, int length )
-        : SeqBase<Char>( PyUnicode_FromKindAndData( PyUnicode_4BYTE_KIND, reinterpret_cast<const Py_UCS4 *>( s ), length ), true )
+        : SeqBase<Char>( PyUnicode_FromKindAndData( PyUnicode_4BYTE_KIND, reinterpret_cast<const char32_t *>( s ), length ), true )
         {
             validate();
         }
 
         String( const int *s, int length )
-        : SeqBase<Char>( PyUnicode_FromKindAndData( PyUnicode_4BYTE_KIND, reinterpret_cast<const Py_UCS4 *>( s ), length ), true )
+        : SeqBase<Char>( PyUnicode_FromKindAndData( PyUnicode_4BYTE_KIND, reinterpret_cast<const char32_t *>( s ), length ), true )
         {
             validate();
         }
@@ -2196,7 +2196,7 @@ namespace Py
 #if !defined( Py_UNICODE_WIDE ) && !defined( Py_LIMITED_API )
         String &operator=( const ucs4string &v )
         {
-            set( PyUnicode_FromKindAndData( PyUnicode_4BYTE_KIND, reinterpret_cast<const Py_UCS4 *>( v.data() ), v.length() ), true );
+            set( PyUnicode_FromKindAndData( PyUnicode_4BYTE_KIND, reinterpret_cast<const char32_t *>( v.data() ), v.length() ), true );
             return *this;
         }
 #endif
@@ -2237,7 +2237,7 @@ namespace Py
             {
                 ifPyErrorThrowCxxException();
             }
-            ucs4string ucs4( buf, size() );
+            ucs4string ucs4( reinterpret_cast<char32_t *>(buf), size() );
             delete[] buf;
 
             return ucs4;
diff --git a/src/3rdParty/PyCXX/CXX/Python3/cxxsupport.cxx b/src/3rdParty/PyCXX/CXX/Python3/cxxsupport.cxx
index a22160bd02..3c58afe960 100644
--- a/src/3rdParty/PyCXX/CXX/Python3/cxxsupport.cxx
+++ b/src/3rdParty/PyCXX/CXX/Python3/cxxsupport.cxx
@@ -48,7 +48,7 @@ Py_ssize_t numeric_limits_max()
 #if !defined(Py_LIMITED_API)
 Py_UNICODE unicode_null_string[1] = { 0 };
 #endif
-Py_UCS4 ucs4_null_string[1] = { 0 };
+char32_t ucs4_null_string[1] = { 0 };
 
 Type Object::type() const
 {
diff --git a/src/3rdParty/PyCXX/CXX/Version.hxx b/src/3rdParty/PyCXX/CXX/Version.hxx
index 59fe3c203b..a814ac92d6 100644
--- a/src/3rdParty/PyCXX/CXX/Version.hxx
+++ b/src/3rdParty/PyCXX/CXX/Version.hxx
@@ -40,7 +40,7 @@
 
 #define PYCXX_VERSION_MAJOR 7
 #define PYCXX_VERSION_MINOR 1
-#define PYCXX_VERSION_PATCH 9
+#define PYCXX_VERSION_PATCH 11
 #define PYCXX_MAKEVERSION( major, minor, patch ) ((major<<16)|(minor<<8)|(patch))
 #define PYCXX_VERSION PYCXX_MAKEVERSION( PYCXX_VERSION_MAJOR, PYCXX_VERSION_MINOR, PYCXX_VERSION_PATCH )
 #endif