diff --git a/freqtrade/resolvers/strategy_resolver.py b/freqtrade/resolvers/strategy_resolver.py
index d214550d8..ca7e1165b 100644
--- a/freqtrade/resolvers/strategy_resolver.py
+++ b/freqtrade/resolvers/strategy_resolver.py
@@ -23,6 +23,8 @@ class StrategyResolver(IResolver):
     This class contains all the logic to load custom strategy class
     """
 
+    __slots__ = ['strategy']
+
     def __init__(self, config: Optional[Dict] = None) -> None:
         """
         Load the custom class from config parameter
diff --git a/user_data/notebooks/strategy_analysis_example.ipynb b/user_data/notebooks/strategy_analysis_example.ipynb
index 13dbf8267..6b55db9c8 100644
--- a/user_data/notebooks/strategy_analysis_example.ipynb
+++ b/user_data/notebooks/strategy_analysis_example.ipynb
@@ -282,9 +282,9 @@
  "metadata": {
   "file_extension": ".py",
   "kernelspec": {
-   "display_name": "Python [conda env:freqtrade]",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "conda-env-freqtrade-py"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {