diff --git a/DirectXTex/DirectXTexWIC.cpp b/DirectXTex/DirectXTexWIC.cpp
index 8ce57c2..f5cb6d8 100644
--- a/DirectXTex/DirectXTexWIC.cpp
+++ b/DirectXTex/DirectXTexWIC.cpp
@@ -163,7 +163,7 @@ namespace
                 if (iswic2)
                 {
                     if (pConvert)
-                        memcpy(pConvert, &GUID_WICPixelFormat96bppRGBFloat, sizeof(WICPixelFormatGUID));
+                        memcpy_s(pConvert, sizeof(WICPixelFormatGUID), &GUID_WICPixelFormat96bppRGBFloat, sizeof(GUID));
                     format = DXGI_FORMAT_R32G32B32_FLOAT;
                 }
                 else
@@ -172,7 +172,7 @@ namespace
 #endif
                 {
                     if (pConvert)
-                        memcpy(pConvert, &GUID_WICPixelFormat128bppRGBAFloat, sizeof(WICPixelFormatGUID));
+                        memcpy_s(pConvert, sizeof(WICPixelFormatGUID), &GUID_WICPixelFormat128bppRGBAFloat, sizeof(GUID));
                     format = DXGI_FORMAT_R32G32B32A32_FLOAT;
                 }
             }
@@ -183,7 +183,7 @@ namespace
                     if (memcmp(&g_WICConvert[i].source, &pixelFormat, sizeof(WICPixelFormatGUID)) == 0)
                     {
                         if (pConvert)
-                            memcpy(pConvert, &g_WICConvert[i].target, sizeof(WICPixelFormatGUID));
+                            memcpy_s(pConvert, sizeof(WICPixelFormatGUID), &g_WICConvert[i].target, sizeof(GUID));
 
                         format = _WICToDXGI(g_WICConvert[i].target);
                         assert(format != DXGI_FORMAT_UNKNOWN);
@@ -202,7 +202,7 @@ namespace
             {
                 format = DXGI_FORMAT_R8G8B8A8_UNORM;
                 if (pConvert)
-                    memcpy(pConvert, &GUID_WICPixelFormat32bppRGBA, sizeof(WICPixelFormatGUID));
+                    memcpy_s(pConvert, sizeof(WICPixelFormatGUID), &GUID_WICPixelFormat32bppRGBA, sizeof(GUID));
             }
             break;
 
@@ -211,7 +211,7 @@ namespace
             {
                 format = DXGI_FORMAT_R10G10B10A2_UNORM;
                 if (pConvert)
-                    memcpy(pConvert, &GUID_WICPixelFormat32bppRGBA1010102, sizeof(WICPixelFormatGUID));
+                    memcpy_s(pConvert, sizeof(WICPixelFormatGUID), &GUID_WICPixelFormat32bppRGBA1010102, sizeof(GUID));
             }
             break;
 
@@ -221,7 +221,7 @@ namespace
             {
                 format = DXGI_FORMAT_R8G8B8A8_UNORM;
                 if (pConvert)
-                    memcpy(pConvert, &GUID_WICPixelFormat32bppRGBA, sizeof(WICPixelFormatGUID));
+                    memcpy_s(pConvert, sizeof(WICPixelFormatGUID), &GUID_WICPixelFormat32bppRGBA, sizeof(GUID));
             }
             break;
 
@@ -231,7 +231,7 @@ namespace
                 // By default we want to promote a black & white to gresycale since R1 is not a generally supported D3D format
                 format = DXGI_FORMAT_R8_UNORM;
                 if (pConvert)
-                    memcpy(pConvert, &GUID_WICPixelFormat8bppGray, sizeof(WICPixelFormatGUID));
+                    memcpy_s(pConvert, sizeof(WICPixelFormatGUID), &GUID_WICPixelFormat8bppGray, sizeof(GUID));
             }
             break;
 
diff --git a/WICTextureLoader/WICTextureLoader.cpp b/WICTextureLoader/WICTextureLoader.cpp
index 2d2a6ad..b7a64e0 100644
--- a/WICTextureLoader/WICTextureLoader.cpp
+++ b/WICTextureLoader/WICTextureLoader.cpp
@@ -375,7 +375,7 @@ namespace
             return hr;
 
         WICPixelFormatGUID convertGUID;
-        memcpy(&convertGUID, &pixelFormat, sizeof(WICPixelFormatGUID));
+        memcpy_s(&convertGUID, sizeof(WICPixelFormatGUID), &pixelFormat, sizeof(GUID));
 
         size_t bpp = 0;
 
@@ -387,14 +387,14 @@ namespace
 #if (_WIN32_WINNT >= _WIN32_WINNT_WIN8) || defined(_WIN7_PLATFORM_UPDATE)
                 if (g_WIC2)
                 {
-                    memcpy(&convertGUID, &GUID_WICPixelFormat96bppRGBFloat, sizeof(WICPixelFormatGUID));
+                    memcpy_s(&convertGUID, sizeof(WICPixelFormatGUID), &GUID_WICPixelFormat96bppRGBFloat, sizeof(GUID));
                     format = DXGI_FORMAT_R32G32B32_FLOAT;
                     bpp = 96;
                 }
                 else
 #endif
                 {
-                    memcpy(&convertGUID, &GUID_WICPixelFormat128bppRGBAFloat, sizeof(WICPixelFormatGUID));
+                    memcpy_s(&convertGUID, sizeof(WICPixelFormatGUID), &GUID_WICPixelFormat128bppRGBAFloat, sizeof(GUID));
                     format = DXGI_FORMAT_R32G32B32A32_FLOAT;
                     bpp = 128;
                 }
@@ -405,7 +405,7 @@ namespace
                 {
                     if (memcmp(&g_WICConvert[i].source, &pixelFormat, sizeof(WICPixelFormatGUID)) == 0)
                     {
-                        memcpy(&convertGUID, &g_WICConvert[i].target, sizeof(WICPixelFormatGUID));
+                        memcpy_s(&convertGUID, sizeof(WICPixelFormatGUID), &g_WICConvert[i].target, sizeof(GUID));
 
                         format = _WICToDXGI(g_WICConvert[i].target);
                         assert(format != DXGI_FORMAT_UNKNOWN);
@@ -432,7 +432,7 @@ namespace
             if (FAILED(hr) || !(fmtSupport & D3D11_FORMAT_SUPPORT_MIP_AUTOGEN))
             {
                 // Use R32G32B32A32_FLOAT instead which is required for Feature Level 10.0 and up
-                memcpy(&convertGUID, &GUID_WICPixelFormat128bppRGBAFloat, sizeof(WICPixelFormatGUID));
+                memcpy_s(&convertGUID, sizeof(WICPixelFormatGUID), &GUID_WICPixelFormat128bppRGBAFloat, sizeof(GUID));
                 format = DXGI_FORMAT_R32G32B32A32_FLOAT;
                 bpp = 128;
             }
@@ -489,7 +489,7 @@ namespace
         if (FAILED(hr) || !(support & D3D11_FORMAT_SUPPORT_TEXTURE2D))
         {
             // Fallback to RGBA 32-bit format which is supported by all devices
-            memcpy(&convertGUID, &GUID_WICPixelFormat32bppRGBA, sizeof(WICPixelFormatGUID));
+            memcpy_s(&convertGUID, sizeof(WICPixelFormatGUID), &GUID_WICPixelFormat32bppRGBA, sizeof(GUID));
             format = DXGI_FORMAT_R8G8B8A8_UNORM;
             bpp = 32;
         }
diff --git a/WICTextureLoader/WICTextureLoader12.cpp b/WICTextureLoader/WICTextureLoader12.cpp
index 1c5f90c..f48b130 100644
--- a/WICTextureLoader/WICTextureLoader12.cpp
+++ b/WICTextureLoader/WICTextureLoader12.cpp
@@ -315,7 +315,7 @@ namespace
             return hr;
 
         WICPixelFormatGUID convertGUID;
-        memcpy(&convertGUID, &pixelFormat, sizeof(WICPixelFormatGUID));
+        memcpy_s(&convertGUID, sizeof(WICPixelFormatGUID), &pixelFormat, sizeof(GUID));
 
         size_t bpp = 0;
 
@@ -326,7 +326,7 @@ namespace
             {
                 if (memcmp(&g_WICConvert[i].source, &pixelFormat, sizeof(WICPixelFormatGUID)) == 0)
                 {
-                    memcpy(&convertGUID, &g_WICConvert[i].target, sizeof(WICPixelFormatGUID));
+                    memcpy_s(&convertGUID, sizeof(WICPixelFormatGUID), &g_WICConvert[i].target, sizeof(GUID));
 
                     format = _WICToDXGI(g_WICConvert[i].target);
                     assert(format != DXGI_FORMAT_UNKNOWN);