diff --git a/.github/workflows/workflow.yaml b/.github/workflows/workflow.yaml
index 1485e4d..4e05ba5 100644
--- a/.github/workflows/workflow.yaml
+++ b/.github/workflows/workflow.yaml
@@ -28,13 +28,11 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Install mamba and dependencies
-        uses: mamba-org/provision-with-micromamba@main
+      - uses: mamba-org/setup-micromamba@v1
         with:
           environment-file: ci_env.yml
-          environment-name: ci-env
-          micromamba-version: '1.4.1'
-
+          cache-environment: false
+          
       - name: Install empack
         shell: bash -l {0}
         run: |
diff --git a/README.md b/README.md
index 0f5031a..43fcdc6 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
+
 # empack
 
 Pack a mamba environment with emsdk
diff --git a/tests/test_integration.py b/tests/test_integration.py
index 9b40ba6..93c7d32 100644
--- a/tests/test_integration.py
+++ b/tests/test_integration.py
@@ -7,8 +7,7 @@
 
 from .conftest import CHANNELS
 
-PYJS_VERSION = "1.0.0"
-PYJS_SPEC = f"pyjs>={PYJS_VERSION}"
+PYJS_SPEC = "pyjs==2.0.0"
 
 
 @pytest.mark.parametrize("backend_type", ["browser-main", "browser-worker"])