diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 0000000..0d6dfbb
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,5 @@
+# Agent notes
+
+- Do not update `CHANGELOG.rst`. The changelog is now generated dynamically
+  from GitHub Release notes, so hand-edits to that file are stale/confusing
+  and should be avoided.
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..5d30268
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1 @@
+Read AGENTS.md.
diff --git a/pyproject.toml b/pyproject.toml
index dbd64c4..5434cef 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,9 +30,9 @@ classifiers = [
 dynamic = ["version"]
 
 dependencies = [
-    "numpy>=1.6.2",
-    "scipy>=0.12.0",
-    "astropy>=1.1",
+    "numpy>=1.26",
+    "scipy>=1.11",
+    "astropy>=6.0",
     "deprecation",
     "click",
     "toml>=0.10.1",
diff --git a/uv.lock b/uv.lock
index 15710bf..54398b6 100644
--- a/uv.lock
+++ b/uv.lock
@@ -166,7 +166,7 @@ name = "cffi"
 version = "2.0.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "pycparser", marker = "implementation_name != 'PyPy'" },
+    { name = "pycparser" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/eb/56/b1ba7935a17738ae8453301356628e8147c79dbb825bcbc73dc7401f9846/cffi-2.0.0.tar.gz", hash = "sha256:44d1b5909021139fe36001ae048dbdde8214afa20200eda0f64c068cac5d5529", size = 523588, upload-time = "2025-09-08T23:24:04.541Z" }
 wheels = [
@@ -590,7 +590,7 @@ tests = [
 
 [package.metadata]
 requires-dist = [
-    { name = "astropy", specifier = ">=1.1" },
+    { name = "astropy", specifier = ">=6.0" },
     { name = "cached-property" },
     { name = "camb", specifier = ">=1.0.0" },
     { name = "click" },
@@ -599,9 +599,9 @@ requires-dist = [
     { name = "deprecation" },
     { name = "emcee", marker = "extra == 'extra'", specifier = ">=3.0" },
     { name = "emcee", marker = "extra == 'fit'", specifier = ">=3.0" },
-    { name = "numpy", specifier = ">=1.6.2" },
+    { name = "numpy", specifier = ">=1.26" },
     { name = "rich" },
-    { name = "scipy", specifier = ">=0.12.0" },
+    { name = "scipy", specifier = ">=1.11" },
     { name = "toml", specifier = ">=0.10.1" },
 ]
 provides-extras = ["cosmo", "extra", "fit"]