diff --git a/environment.yml b/environment.yml
index 7a8bd8a795..559aebcae9 100644
--- a/environment.yml
+++ b/environment.yml
@@ -17,6 +17,7 @@ dependencies:
 - get-annotations~=0.1
 - python-graphviz~=0.19
 - ipython>=7
+- jedi<0.19
 - jinja2~=3.0
 - kiwipy[rmq]~=0.7.7
 - importlib-metadata~=6.0
diff --git a/pyproject.toml b/pyproject.toml
index 610936a32c..7a47d39d63 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,6 +36,7 @@ dependencies = [
     "get-annotations~=0.1;python_version<'3.10'",
     "graphviz~=0.19",
     "ipython>=7",
+    "jedi<0.19",
     "jinja2~=3.0",
     "kiwipy[rmq]~=0.7.7",
     "importlib-metadata~=6.0",
diff --git a/requirements/requirements-py-3.12.txt b/requirements/requirements-py-3.12.txt
index f288a57725..48fdbf16d8 100644
--- a/requirements/requirements-py-3.12.txt
+++ b/requirements/requirements-py-3.12.txt
@@ -62,7 +62,7 @@ ipython==8.16.1
 ipython-genutils==0.2.0
 ipywidgets==8.1.1
 itsdangerous==2.1.2
-jedi==0.19.1
+jedi==0.18.2
 jinja2==3.1.2
 joblib==1.3.2
 jsonschema[format-nongpl]==3.2.0