diff --git a/.github/workflows/test-and-report.yml b/.github/workflows/test-and-report.yml
index 384a6d2..82cf095 100644
--- a/.github/workflows/test-and-report.yml
+++ b/.github/workflows/test-and-report.yml
@@ -19,10 +19,15 @@ jobs:
             - name: Install poetry
               uses: snok/install-poetry@v1
               with:
+                version: 1.3.2
                 virtualenvs-create: true
                 
             - name: Install dependencies
-              run: poetry install --no-interaction
+              run: |
+                poetry run pip install --upgrade pip
+                poetry run pip install --upgrade setuptools
+                poetry run pip list
+                poetry install --no-interaction
 
             - name: Run tests and generate coverage report
               run: |
diff --git a/poetry.lock b/poetry.lock
index 1d4bd22..3134c30 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -149,7 +149,7 @@ css = ["tinycss2 (>=1.1.0,<1.3)"]
 name = "certifi"
 version = "2024.2.2"
 description = "Python package for providing Mozilla's CA Bundle."
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -226,7 +226,7 @@ pycparser = "*"
 name = "charset-normalizer"
 version = "3.3.2"
 description = "The Real First Universal Charset Detector. Open, modern and actively maintained alternative to Chardet."
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.7.0"
 files = [
@@ -694,7 +694,7 @@ sphinx-basic-ng = "*"
 name = "idna"
 version = "3.7"
 description = "Internationalized Domain Names in Applications (IDNA)"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.5"
 files = [
@@ -1100,17 +1100,6 @@ files = [
     {file = "kiwisolver-1.4.5.tar.gz", hash = "sha256:e57e563a57fb22a142da34f38acc2fc1a5c864bc29ca1517a88abc963e60d6ec"},
 ]
 
-[[package]]
-name = "lock"
-version = "2018.3.25.2110"
-description = "module for enabling file locks"
-category = "main"
-optional = false
-python-versions = "*"
-files = [
-    {file = "lock-2018.3.25.2110.tar.gz", hash = "sha256:cc5ac770930493eed7a8cfd0cf2568a125faf112eb8aa6b6149b3e581523d0c7"},
-]
-
 [[package]]
 name = "markdown-it-py"
 version = "2.2.0"
@@ -2241,7 +2230,7 @@ rpds-py = ">=0.7.0"
 name = "requests"
 version = "2.31.0"
 description = "Python HTTP for Humans."
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2855,7 +2844,7 @@ files = [
 name = "urllib3"
 version = "2.2.1"
 description = "HTTP library with thread-safe connection pooling, file post, and more."
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.8"
 files = [
@@ -2912,4 +2901,4 @@ testing = ["big-O", "jaraco.functools", "jaraco.itertools", "more-itertools", "p
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.8, <3.12"
-content-hash = "311c018d361ccc42480a23b6cbb7a493b715c63919c2eb9cfe759e58afcca58c"
+content-hash = "5ddc5f549e85df98bcdaf24275600b3ffaac543d00d1b48c13b810b4fbd95746"
diff --git a/pyproject.toml b/pyproject.toml
index 58eab89..e79422b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "py-smps"
-version = "2.1.0a5"
+version = "2.1.0a6"
 description = "A simple python library to import and visualize data from particle sizing instruments"
 authors = ["David H Hagan <david.hagan@quant-aq.com>"]
 license = "MIT"
@@ -19,10 +19,10 @@ scipy = ">1.7"
 setuptools = ">48.0"
 joblib = "^1.3"
 seaborn = ">=0.12"
-matplotlib = ">=3.4,<3.6.1 || >3.6.1"
-numpy = ">1.20,<1.24.0 || >1.24.0"
-statsmodels = ">=0.12.0"
-lock = "^2018.3.25.2110"
+matplotlib = ">=3.4,!=3.6.1"
+numpy = ">1.20,!=1.24.0"
+statsmodels = ">=0.13.0"
+requests = ">=2.0"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^6.0"
@@ -40,8 +40,8 @@ sphinx-gallery = "^0.13.0"
 ipykernel = "^6.24.0"
 
 [build-system]
-requires = ["poetry>=0.12"]
-build-backend = "poetry.masonry.api"
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
 
 [tool.poetry.urls]
 "Bug Tracker" = "https://github.com/quant-aq/py-smps/issues"
\ No newline at end of file