diff --git a/ilcsoft/qt5.py b/ilcsoft/qt5.py
index b0cd33a8..77ea80ba 100644
--- a/ilcsoft/qt5.py
+++ b/ilcsoft/qt5.py
@@ -23,7 +23,7 @@ def __init__(self, userInput):
         self.hasCMakeFindSupport = True
         self.download.supportHEAD = False
         self.download.supportedTypes = [ "git" ] 
-        self.download.svnurl = 'https://github.com/qt/qt5.git'
+        self.download.svnurl = 'https://code.qt.io/qt/qt5.git'
 
         self.reqfiles = [
             ["lib/libQt5Core.so", "lib64/libQt5Core.so", "lib/libQt5Core.dylib", "lib/libQt5Core.la"],
@@ -95,7 +95,7 @@ def compile(self):
         qt_cfg_options = " -opensource -confirm-license -nomake tests -make libs "
         cxxStandard = self.envcmake.get("CMAKE_CXX_STANDARD", None)
         if cxxStandard:
-            qt_cfg_options += " -c++std c++" + str(cxxStandard)
+            qt_cfg_options += " -c++std c++17"
         
         if( os_system( "../" + self.name + "/configure -prefix " + self.installPath + qt_cfg_options
                 + " 2>&1 | tee -a " + self.logfile ) != 0 ):
diff --git a/releases/v02-03/release-versions.py b/releases/v02-03/release-versions.py
index 158a7252..2bcce43f 100644
--- a/releases/v02-03/release-versions.py
+++ b/releases/v02-03/release-versions.py
@@ -116,7 +116,7 @@
 
 GSL_version = "2.7"
 
-Qt5_version = "v5.13.1"
+Qt5_version = "v5.15.15-lts-lgpl"
 
 CMake_version = "3.31.0"