diff --git a/pyproject.toml b/pyproject.toml
index f09f7cd0..546df61e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,6 +23,11 @@ dependencies = [
     "hypothesis",
     "pytest",
     "pytest-cov",
+
+    # eth-rlp requirement, not installed by default with 3.12
+    "typing-extensions",
+
+    # gas profiling tables
     "rich",
 
     # required for forking: