diff --git a/README.md b/README.md
index 9b8a0eb..019637b 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@ A website for pgcli project.
 
 # Running the server
 
+Use Python 3.12 to match the Netlify build runtime in `runtime.txt`.
+
 ### Install the requirements file
 `pip install -r requirements.txt`
 
diff --git a/requirements.txt b/requirements.txt
index 056d340..d3f708d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-anyio==4.9.0
+anyio==4.14.2
 blinker==1.9.0
 docutils==0.21.2
 exceptiongroup==1.2.2
diff --git a/runtime.txt b/runtime.txt
index bd28b9c..e4fba21 100644
--- a/runtime.txt
+++ b/runtime.txt
@@ -1 +1 @@
-3.9
+3.12