diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index afe7128..764d60a 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -10,7 +10,7 @@ env:
     BUILD_TYPE: Release
     VULKAN_SDK_VERSION: 1.3.236
     EMBREE_VERSION: 3.13.5
-    ISPC_VERSION: 1.18.1
+    ISPC_VERSION: 1.18.0
     TBB_VERSION: 2021.2.0
     OPTIX_VERSION: 7.6.0