diff --git a/docs/guide/installation.rst b/docs/guide/installation.rst
index 29ed540..76fb109 100644
--- a/docs/guide/installation.rst
+++ b/docs/guide/installation.rst
@@ -27,9 +27,11 @@ App can detect the robot.
 Dependencies
 ------------
 
+PUDU requires Python 3.10 for compatibility with the OT-2 simulator.
+
 PUDU depends on:
 
-* ``opentrons >= 8.4.1``
+* ``opentrons >= 8.4.1, < 9``
 * ``xlsxwriter >= 3.2.5``
 
 For building this documentation locally::
diff --git a/pyproject.toml b/pyproject.toml
index 265de6d..4388d76 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ name = "pudupy"
 version = "1.0.0b9"
 description = "Protocol Unified Design Unit"
 readme = "README.md"
-requires-python = ">=3.7"
+requires-python = ">=3.10,<3.11"
 license = {file = "LICENSE"}
 keywords = ["pudu", "lab", "automation", "opentrons", "synthetic biology"]
 authors = [
@@ -25,7 +25,7 @@ classifiers = [
 ]
 
 dependencies = [
-  "opentrons>=8.4.1",
+  "opentrons>=8.4.1,<9",
   "xlsxwriter>=3.2.5",
 ]