diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index e066711..9d8c01e 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -27,7 +27,7 @@ jobs:
       - name: install python dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install tox tox-gh-actions poetry
+          pip install tox tox-gh-actions poetry==1.2.0
       - name: make jars dir
         run: mkdir -p src/pymeter/resources/jars
       - name: copy jars
diff --git a/.github/workflows/publish-pypi.yaml b/.github/workflows/publish-pypi.yaml
index 6ff1b27..c61f6d9 100644
--- a/.github/workflows/publish-pypi.yaml
+++ b/.github/workflows/publish-pypi.yaml
@@ -40,7 +40,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install poetry
+        pip install poetry==1.2.0
         poetry install --only-root
     - name: Build package
       run: poetry build -f sdist
diff --git a/pyproject.toml b/pyproject.toml
index 8d6b8d3..bd3b405 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,6 +37,6 @@ sphinx-tabs = "^3.4.1"
 parameterized = "^0.8.1"
 
 [build-system]
-requires = ["poetry-core>=1.2.0"]
+requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"