diff --git a/onnxruntime/test/python/requirements.txt b/onnxruntime/test/python/requirements.txt
index e33fe0e4da..dc158e0eeb 100644
--- a/onnxruntime/test/python/requirements.txt
+++ b/onnxruntime/test/python/requirements.txt
@@ -1,2 +1,2 @@
-onnx
-pytest
\ No newline at end of file
+onnx==1.15.0
+pytest
diff --git a/tools/ci_build/build.py b/tools/ci_build/build.py
index 3c1bdfc54c..e1649ae251 100644
--- a/tools/ci_build/build.py
+++ b/tools/ci_build/build.py
@@ -2087,7 +2087,9 @@ def run_onnxruntime_tests(args, source_dir, ctest_path, build_dir, configs):
                     run_subprocess(
                         [sys.executable, "-m", "pip", "uninstall", "--yes", "onnx"], cwd=cwd, dll_path=dll_path
                     )
-                    run_subprocess([sys.executable, "-m", "pip", "install", "-q", "onnx"], cwd=cwd, dll_path=dll_path)
+                    run_subprocess(
+                        [sys.executable, "-m", "pip", "install", "-q", "onnx==1.15.0"], cwd=cwd, dll_path=dll_path
+                    )
                 run_subprocess([sys.executable, "onnxruntime_test_python_iobinding.py"], cwd=cwd, dll_path=dll_path)
 
             if args.use_cuda: