diff --git a/.github/workflows/test-compiler.yml b/.github/workflows/test-compiler.yml
index 4a89833..8f22648 100644
--- a/.github/workflows/test-compiler.yml
+++ b/.github/workflows/test-compiler.yml
@@ -12,13 +12,15 @@ permissions:
 jobs:
   build:
     runs-on: ubuntu-latest
+    env:
+      CASAC_RELEASE_TAG: v1.9.0
     steps:
     - uses: actions/checkout@v5
     - name: Download casac release binary
       run: |
         curl --silent --location --fail \
           --output casac-release \
-          "https://github.com/frendsick/casa/releases/latest/download/casac"
+          "https://github.com/frendsick/casa/releases/download/${CASAC_RELEASE_TAG}/casac"
         chmod +x casac-release
     - name: Bootstrap stage1 compiler from branch
       run: ./casac-release -L lib casa.casa -o casac-stage1
diff --git a/.github/workflows/test-examples.yml b/.github/workflows/test-examples.yml
index b9e0d8f..bf05de3 100644
--- a/.github/workflows/test-examples.yml
+++ b/.github/workflows/test-examples.yml
@@ -12,13 +12,15 @@ permissions:
 jobs:
   build:
     runs-on: ubuntu-latest
+    env:
+      CASAC_RELEASE_TAG: v1.9.0
     steps:
     - uses: actions/checkout@v5
     - name: Download casac release binary
       run: |
         curl --silent --location --fail \
           --output casac-release \
-          "https://github.com/frendsick/casa/releases/latest/download/casac"
+          "https://github.com/frendsick/casa/releases/download/${CASAC_RELEASE_TAG}/casac"
         chmod +x casac-release
     - name: Bootstrap stage1 compiler from branch
       run: ./casac-release -L lib casa.casa -o casac-stage1