diff --git a/kramv/KramViewerBase.cpp b/kramv/KramViewerBase.cpp
index 320f091..572d665 100644
--- a/kramv/KramViewerBase.cpp
+++ b/kramv/KramViewerBase.cpp
@@ -982,7 +982,8 @@ bool Data::listFilesInArchive(int32_t urlIndex)
     
     // filter out unsupported extensions
     vector<string> extensions = {
-        ".ktx", ".ktx2", ".png", ".dds" // textures
+        ".ktx", ".ktx2", ".png",  // textures
+        ".dds", ".DDS" // allow caps for dds
 #if USE_GLTF
         // TODO: can't support these until have a loader from memory block
         // GLTFAsset requires a URL.
diff --git a/libkram/kram/Kram.cpp b/libkram/kram/Kram.cpp
index 2951a5b..f4f06b0 100644
--- a/libkram/kram/Kram.cpp
+++ b/libkram/kram/Kram.cpp
@@ -86,7 +86,8 @@ bool isKTX2Filename(const char* filename)
 bool isDDSFilename(const char* filename)
 {
     // should really look at first 4 bytes of data
-    return endsWithExtension(filename, ".dds");
+    return endsWithExtension(filename, ".dds") ||
+           endsWithExtension(filename, ".DDS"); // allow uppercase
 }
 bool isPNGFilename(const char* filename)
 {