diff --git a/DEVELOPER.md b/DEVELOPER.md
index f7e0ee1..6c5f5f6 100644
--- a/DEVELOPER.md
+++ b/DEVELOPER.md
@@ -14,10 +14,10 @@ eval "$(pyenv init -)"
 eval "$(pyenv virtualenv-init -)"
 
 # Install a specific version of Python
-pyenv install 3.11.5  # Example version
+pyenv install 3.10.14
 
 # Set the local version of Python for the project
-pyenv local 3.11.5
+pyenv local 3.10.14
 ```
 
 ## Install poetry
diff --git a/poetry.lock b/poetry.lock
index 4c89f31..0469c55 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -25,6 +25,20 @@ files = [
     {file = "colorama-0.4.6.tar.gz", hash = "sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44"},
 ]
 
+[[package]]
+name = "exceptiongroup"
+version = "1.2.2"
+description = "Backport of PEP 654 (exception groups)"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "exceptiongroup-1.2.2-py3-none-any.whl", hash = "sha256:3111b9d131c238bec2f8f516e123e14ba243563fb135d3fe885990585aa7795b"},
+    {file = "exceptiongroup-1.2.2.tar.gz", hash = "sha256:47c2edf7c6738fafb49fd34290706d1a1a2f4d1c6df275526b62cbb4aa5393cc"},
+]
+
+[package.extras]
+test = ["pytest (>=6)"]
+
 [[package]]
 name = "iniconfig"
 version = "2.0.0"
@@ -75,14 +89,27 @@ files = [
 
 [package.dependencies]
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
+exceptiongroup = {version = ">=1.0.0rc8", markers = "python_version < \"3.11\""}
 iniconfig = "*"
 packaging = "*"
 pluggy = ">=1.5,<2"
+tomli = {version = ">=1", markers = "python_version < \"3.11\""}
 
 [package.extras]
 dev = ["argcomplete", "attrs (>=19.2)", "hypothesis (>=3.56)", "mock", "pygments (>=2.7.2)", "requests", "setuptools", "xmlschema"]
 
+[[package]]
+name = "tomli"
+version = "2.0.1"
+description = "A lil' TOML parser"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "tomli-2.0.1-py3-none-any.whl", hash = "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc"},
+    {file = "tomli-2.0.1.tar.gz", hash = "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"},
+]
+
 [metadata]
 lock-version = "2.0"
-python-versions = ">=3.11"
-content-hash = "a1d45ea3758c074900158eb7006b40d5420d00b7db6132e499d7146e8a796ccd"
+python-versions = ">=3.10"
+content-hash = "a63769b89d1016c0563263d1026af913dd6915b7d2ff416116ea152b3f85d9e3"
diff --git a/pyproject.toml b/pyproject.toml
index 7844b0a..ef4f5a9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ readme = "README.md"
 packages = [{include = "gcf_data_mapper"}]
 
 [tool.poetry.dependencies]
-python = ">=3.11"
+python = ">=3.10"
 click = "^8.1.7"
 
 [tool.poetry.dev-dependencies]