diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1e3e5da..166dad2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,7 +33,10 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          # requires-python is >=3.11; every version in that range is tested.
+          # requires-python is >=3.10; every version in that range is tested.
+          # 3.10 is the floor because SCALCS supports it, and dcio uses no
+          # 3.11 syntax or stdlib -- the original >=3.11 was never earned.
+          - { name: linux-py310, os: ubuntu-24.04, python: '3.10' }
           - { name: linux-py311, os: ubuntu-24.04, python: '3.11' }
           - { name: linux-py312, os: ubuntu-24.04, python: '3.12' }
           - { name: linux-py313, os: ubuntu-24.04, python: '3.13', coverage: true }
@@ -96,7 +99,7 @@ jobs:
 
       - uses: actions/setup-python@v6
         with:
-          python-version: '3.11'
+          python-version: '3.10'
 
       - name: Install with the declared minimum numpy
         run: |
diff --git a/pyproject.toml b/pyproject.toml
index 943ef67..6d5374c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,13 +4,13 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "dcio"
-version = "0.1.0"
+version = "0.1.1"
 description = "I/O and record layer for electrophysiology file formats used by the DCPROGS suite"
 readme = "README.md"
 license = "MIT"
 license-files = ["LICENSE"]
 authors = [{ name = "Remis Lape" }]
-requires-python = ">=3.11"
+requires-python = ">=3.10"
 dependencies = ["numpy>=2.0"]
 keywords = [
     "electrophysiology",
@@ -25,6 +25,7 @@ classifiers = [
     "Intended Audience :: Science/Research",
     "Topic :: Scientific/Engineering :: Bio-Informatics",
     "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",