diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 7d85b41..20f90b7 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -10,6 +10,8 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v4
       - uses: tree-sitter/setup-action@v2
+        with:
+          tree-sitter-ref: "master"
       # Because our tree-sitter code is in a subdirectory,
       # and working-directory does not apply to uses, we
       # are forced to specify calls to the CI ourselves.
@@ -25,6 +27,8 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v4
       - uses: tree-sitter/setup-action@v2
+        with:
+          tree-sitter-ref: "master"
       - uses: swift-actions/setup-swift@v3
         with:
           swift-version: "main-snapshot"
@@ -44,6 +48,8 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v4
       - uses: tree-sitter/setup-action@v2
+        with:
+          tree-sitter-ref: "master"
       - uses: swift-actions/setup-swift@v3
         with:
           swift-version: "main-snapshot"