fix readthedocs build

wjakob · wjakob · commit 3f3b8d03cdce · 2023-10-12T21:40:45.000+02:00
diff --git a/.readthedocs.yml b/.readthedocs.yml
@@ -0,0 +1,17 @@
+version: 2
+
+submodules:
+  include: all
+  recursive: true
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.10"
+
+sphinx:
+   configuration: docs/conf.py
+
+python:
+   install:
+   - requirements: docs/requirements.txt
diff --git a/docs/requirements.txt b/docs/requirements.txt
@@ -1,4 +1,4 @@
-sphinx>=2.4
+sphinx<4
 IPython
 pygments-mathematica
 pybtex
