diff --git a/spec/interscript/ml/imf_spec.rb b/spec/interscript/ml/imf_spec.rb
index 9c42f50e..58f4bc4c 100644
--- a/spec/interscript/ml/imf_spec.rb
+++ b/spec/interscript/ml/imf_spec.rb
@@ -186,7 +186,7 @@
       # the distribution contract has shipped, incl. static-int8 (v6).
       # Bump this spec WITH the constant, never ahead of it.
       expect(Interscript::ML::IMF::DEFAULT_INDEX_URL).to eq(
-        "https://github.com/interscript/interscript-models/releases/download/index-v10/models-index.yaml"
+        "https://github.com/interscript/interscript-models/releases/download/index-v12/models-index.yaml"
       )
       expect(Interscript::ML::IMF::DEFAULT_INDEX_URL).not_to include("raw.githubusercontent")
     end