diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1e8bfc0..2257db5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,7 +60,8 @@ add_subdirectory("libs/opentimelineio")
 include_directories(
   ${PROJECT_SOURCE_DIR}/libs/opentimelineio/src
   ${PROJECT_SOURCE_DIR}/libs/opentimelineio/src/deps
-  ${PROJECT_SOURCE_DIR}/libs/opentimelineio/src/deps/optional-lite/include
+  ${PROJECT_SOURCE_DIR}/libs/opentimelineio/src/deps/Imath/src
+  ${PROJECT_BINARY_DIR}/libs/opentimelineio/src
 )
 
 if(NOT EMSCRIPTEN AND NOT WIN32)
diff --git a/libs/opentimelineio b/libs/opentimelineio
index 5184c36..60171a4 160000
--- a/libs/opentimelineio
+++ b/libs/opentimelineio
@@ -1 +1 @@
-Subproject commit 5184c36403e6ab94caae20acf6ced709f0dc9c0e
+Subproject commit 60171a4a3f4fc102c609c77743ffe6efae68bc54