diff --git a/.github/workflows/run-yesno-recipe.yml b/.github/workflows/run-yesno-recipe.yml
index edd3d39ce..876b95e71 100644
--- a/.github/workflows/run-yesno-recipe.yml
+++ b/.github/workflows/run-yesno-recipe.yml
@@ -34,7 +34,7 @@ jobs:
         os: [ubuntu-18.04]
         python-version: [3.8]
         torch: ["1.8.1"]
-        k2-version: ["1.8.dev20210917"]
+        k2-version: ["1.9.dev20210919"]
       fail-fast: false
 
     steps:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 6da27170c..150b5258a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -32,7 +32,7 @@ jobs:
         os: [ubuntu-18.04, macos-10.15]
         python-version: [3.6, 3.7, 3.8, 3.9]
         torch: ["1.8.1"]
-        k2-version: ["1.8.dev20210917"]
+        k2-version: ["1.9.dev20210919"]
 
       fail-fast: false