diff --git a/externals/CMakeLists.txt b/externals/CMakeLists.txt
index 2bfb68f8a..3cadebc3c 100644
--- a/externals/CMakeLists.txt
+++ b/externals/CMakeLists.txt
@@ -48,14 +48,8 @@ if (NOT MSVC)
         -Wno-string-concatenation)
 endif()
 
-# SPIRV-Headers (from sirit)
-set(SPIRV_HEADERS_SKIP_EXAMPLES ON)
-set(SPIRV_HEADERS_SKIP_INSTALL ON)
-add_subdirectory(sirit/externals/SPIRV-Headers)
-
 # SPIRV-Tools
-set(SPIRV-Headers_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/sirit/externals/SPIRV-Headers")
-set(SPIRV_HEADER_DIR "${SPIRV-Headers_SOURCE_DIR}")
+set(SPIRV-Headers_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/spirv-tools/external/spirv-headers")
 set(SPIRV_SKIP_TESTS ON)
 set(SPIRV_SKIP_EXECUTABLES ON)
 add_subdirectory(spirv-tools)
diff --git a/externals/sirit b/externals/sirit
index 05ff75e51..ab7546399 160000
--- a/externals/sirit
+++ b/externals/sirit
@@ -1 +1 @@
-Subproject commit 05ff75e51d82755256a9ac92045415ce136c3f2e
+Subproject commit ab75463999f4f3291976b079d42d52ee91eebf3f