diff --git a/.gitmodules b/.gitmodules
index b8ecf47269..3cb897233e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -9,7 +9,7 @@
 	url = https://github.com/google/benchmark.git
 [submodule "cmake/external/onnx"]
 	path = cmake/external/onnx
-	url = https://github.com/onnx/onnx
+	url = https://github.com/onnx/onnx.git
 [submodule "cmake/external/tvm"]
 	path = cmake/external/tvm
 	url = https://github.com/microsoft/onnxruntime-tvm.git
@@ -18,7 +18,7 @@
 	url = https://github.com/HowardHinnant/date.git
 [submodule "cmake/external/nsync"]
 	path = cmake/external/nsync
-	url = https://github.com/google/nsync
+	url = https://github.com/google/nsync.git
 [submodule "cmake/external/re2"]
 	path = cmake/external/re2
 	url = https://github.com/google/re2.git
@@ -39,10 +39,10 @@
 	url = https://github.com/NVlabs/cub.git
 [submodule "cmake/external/wil"]
 	path = cmake/external/wil
-	url = https://github.com/microsoft/wil
+	url = https://github.com/microsoft/wil.git
 [submodule "cmake/external/json"]
 	path = cmake/external/json
-	url = https://github.com/nlohmann/json
+	url = https://github.com/nlohmann/json.git
 [submodule "server/external/spdlog"]
 	path = server/external/spdlog
 	url = https://github.com/gabime/spdlog.git
diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 3c471ed49e..5328333e48 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -284,7 +284,7 @@ if (onnxruntime_BUILD_CSHARP)
 endif()
 
 if (NOT WIN32)
-  #TODO: On Linux we may try https://github.com/microsoft/TraceLogging
+  #TODO: On Linux we may try https://github.com/microsoft/TraceLogging.git
   if (onnxruntime_ENABLE_INSTRUMENT)
     message(WARNING "Instrument is only supported on Windows now")
     set(onnxruntime_ENABLE_INSTRUMENT OFF)
diff --git a/cmake/external/dnnl.cmake b/cmake/external/dnnl.cmake
index 953bcfaee7..6770e66a29 100644
--- a/cmake/external/dnnl.cmake
+++ b/cmake/external/dnnl.cmake
@@ -1,6 +1,6 @@
 include (ExternalProject)
 
-set(DNNL_URL https://github.com/oneapi-src/onednn)
+set(DNNL_URL https://github.com/oneapi-src/onednn.git)
 # If DNNL_TAG is updated, check if MKLML_VERSION and platform.cmake.patch need to be updated.
 set(DNNL_TAG v2.4.4)
 
diff --git a/cmake/external/zlib.cmake b/cmake/external/zlib.cmake
index 0201417015..b7fcd22c7d 100644
--- a/cmake/external/zlib.cmake
+++ b/cmake/external/zlib.cmake
@@ -1,7 +1,7 @@
 include (ExternalProject)
 
 set(zlib_INCLUDE_DIR ${CMAKE_CURRENT_BINARY_DIR}/external/zlib_archive)
-set(ZLIB_URL https://github.com/madler/zlib)
+set(ZLIB_URL https://github.com/madler/zlib.git)
 set(ZLIB_BUILD ${CMAKE_CURRENT_BINARY_DIR}/zlib/src/zlib)
 set(ZLIB_INSTALL ${CMAKE_CURRENT_BINARY_DIR}/zlib/install)
 set(ZLIB_TAG 50893291621658f355bc5b4d450a8d06a563053d)