diff --git a/known_good.json b/known_good.json
index d2b6ec2c..177fab1d 100644
--- a/known_good.json
+++ b/known_good.json
@@ -5,14 +5,14 @@
       "site" : "github",
       "subrepo" : "KhronosGroup/SPIRV-Tools",
       "subdir" : "External/spirv-tools",
-      "commit" : "fb02131cb4ac74a357bb53039ca3dd8926bb3b14"
+      "commit" : "4d22f58a812ea02e1ad53c9ccba12cb48f2bd0b2"
     },
     {
       "name" : "spirv-tools/external/spirv-headers",
       "site" : "github",
       "subrepo" : "KhronosGroup/SPIRV-Headers",
       "subdir" : "External/spirv-tools/external/spirv-headers",
-      "commit" : "dafead1765f6c1a5f9f8a76387dcb2abe4e54acd"
+      "commit" : "f5417a4b6633c3217c9a1bc2f0c70b1454975ba7"
     }
   ]
 }