diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index e58db8f..acd784f 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -30,7 +30,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
           cache: 'pip'
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 93b8628..ee26962 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -15,7 +15,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.x'
 
@@ -39,7 +39,7 @@ jobs:
       run: |
         i=0
         while [ $i -lt 12 ] && [ "${{ github.ref_name }}" != $(pip index versions -i https://test.pypi.org/simple --pre market_prices | cut -d'(' -f2 | cut -d')' -f1 | sed 1q) ];\
-          do echo "waiting for package to appear in test index, i is $i"; echo "sleeping 5s"; sleep 5s; echo "woken up"; ((i++)); echo "next i is $i"; done
+          do echo "waiting for package to appear in test index, i is $i"; echo "sleeping 5s"; sleep 5s; echo "woken up"; let i++; echo "next i is $i"; done
         pip install --index-url https://test.pypi.org/simple market_prices==${{ github.ref_name }} --no-deps
         pip install -r etc/requirements.txt
         python -c 'import market_prices;print(market_prices.__version__)'
@@ -60,6 +60,6 @@ jobs:
       run: |
         i=0
         while [ $i -lt 12 ] && [ "${{ github.ref_name }}" != $(pip index versions -i https://pypi.org/simple --pre market_prices | cut -d'(' -f2 | cut -d')' -f1 | sed 1q) ];\
-          do echo "waiting for package to appear in index, i is $i"; echo "sleeping 5s"; sleep 5s; echo "woken up"; ((i++)); echo "next i is $i"; done
+          do echo "waiting for package to appear in index, i is $i"; echo "sleeping 5s"; sleep 5s; echo "woken up"; let i++; echo "next i is $i"; done
         pip install --index-url https://pypi.org/simple market_prices==${{ github.ref_name }}
         python -c 'import market_prices;print(market_prices.__version__)'