diff --git a/pyproject.toml b/pyproject.toml
index 9a72d21..1a5ad40 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ classifiers = [
     "Intended Audience :: Science/Research",
     "Topic :: Scientific/Engineering",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "click",
     "dacite",
@@ -68,6 +68,14 @@ workflows = [
     "babelon",
     "dosdp",
     "lightrdf",
+    # We do not actually need LinkML directly, but we need to make sure
+    # our dependencies use version 1.10.0 for BOTH `linkml` and
+    # `linkml-runtime`; otherwise we could end up with linkml <= 1.9.6
+    # coupled with linkml-runtime >= 1.10.0, and that combination is
+    # broken because linkml-runtime introduced a breaking change
+    # ("semantic versioning? what is that?").
+    "linkml>=1.10.0",
+    "linkml-runtime>=1.10.0",
     "mkdocs",
     "mkdocs-material",
     "mkdocs-mermaid2-plugin",