diff --git a/.github/workflows/python-app.yml b/.github/workflows/python-app.yml
index b7df9fe..07bb2ad 100644
--- a/.github/workflows/python-app.yml
+++ b/.github/workflows/python-app.yml
@@ -16,7 +16,7 @@ jobs:
     - name: Set up Python 3.10
       uses: actions/setup-python@v4
       with:
-        python-version: 3.10
+        python-version: '3.10'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/README.md b/README.md
index 1a87117..e328426 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # pytket-phir
 
+PHIR stands for _[PECOS](https://github.com/PECOS-packages/PECOS) High-level Intermediate Representation_.
+See [PHIR specification](https://github.com/CQCL/phir/blob/main/phir_spec_qasm.md) for more.
+
 ## Installation
 
 To install the project, clone the repository and run: