diff --git a/src/tint/lang/core/address_space.def b/src/tint/lang/core/address_space.def
index 66a928a..0b8631d 100644
--- a/src/tint/lang/core/address_space.def
+++ b/src/tint/lang/core/address_space.def
@@ -1,4 +1,4 @@
-// https://gpuweb.github.io/gpuweb/wgsl/#storage-class
+// https://www.w3.org/TR/WGSL/#address-space
 enum address_space {
   function
   private
diff --git a/src/tint/lang/core/core.def b/src/tint/lang/core/core.def
index 392edc0..5d9ed31 100644
--- a/src/tint/lang/core/core.def
+++ b/src/tint/lang/core/core.def
@@ -46,7 +46,7 @@
 // Enumerators                                                                //
 ////////////////////////////////////////////////////////////////////////////////
 
-// https://gpuweb.github.io/gpuweb/wgsl/#builtin-values
+// https://www.w3.org/TR/WGSL/#builtin-inputs-outputs
 enum builtin_value {
   position
   vertex_index