diff --git a/CMakeLists.txt b/CMakeLists.txt
index 454f4b7..3776036 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -94,8 +94,8 @@ if(ITKPythonPackage_SUPERBUILD)
 
   set(ITK_REPOSITORY "https://github.com/InsightSoftwareConsortium/ITK.git")
 
-  # master branch, 2024-11-13
-  set(ITK_GIT_TAG "v6.0a01")
+  # master branch, 2025-03-12
+  set(ITK_GIT_TAG "v6.0a03")
 
   #-----------------------------------------------------------------------------
   # A separate project is used to download ITK, so that it can reused
diff --git a/itkVersion.py b/itkVersion.py
index 775f664..02cc7ce 100644
--- a/itkVersion.py
+++ b/itkVersion.py
@@ -1,4 +1,4 @@
-VERSION = '6.0a1'
+VERSION = '6.0a3'
 
 def get_versions():
     """Returns versions for the ITK Python package.