diff --git a/freqtrade/resolvers/iresolver.py b/freqtrade/resolvers/iresolver.py
index 801ad956b..9c3a33f2b 100644
--- a/freqtrade/resolvers/iresolver.py
+++ b/freqtrade/resolvers/iresolver.py
@@ -98,7 +98,7 @@ class IResolver:
             if obj:
                 obj[0].__file__ = str(entry)
                 if add_source:
-                    obj[0].__code__ = obj[1]
+                    obj[0].__source__ = obj[1]
                 return (obj[0], module_path)
         return (None, None)
 
diff --git a/freqtrade/rpc/api_server.py b/freqtrade/rpc/api_server.py
index 489b8760a..ea616c0ec 100644
--- a/freqtrade/rpc/api_server.py
+++ b/freqtrade/rpc/api_server.py
@@ -608,7 +608,7 @@ class ApiServer(RPC):
 
         return self.rest_dump({
             'strategy': strategy_obj.get_strategy_name(),
-            'code': strategy_obj.__code__,
+            'code': strategy_obj.__source__,
          })
 
     @require_login
diff --git a/tests/strategy/test_strategy.py b/tests/strategy/test_strategy.py
index 1641098e9..1c692d2da 100644
--- a/tests/strategy/test_strategy.py
+++ b/tests/strategy/test_strategy.py
@@ -55,8 +55,8 @@ def test_load_strategy(default_conf, result):
                          'strategy_path': str(Path(__file__).parents[2] / 'freqtrade/templates')
                          })
     strategy = StrategyResolver.load_strategy(default_conf)
-    assert isinstance(strategy.__code__, str)
-    assert 'class SampleStrategy' in strategy.__code__
+    assert isinstance(strategy.__source__, str)
+    assert 'class SampleStrategy' in strategy.__source__
     assert isinstance(strategy.__file__, str)
     assert 'rsi' in strategy.advise_indicators(result, {'pair': 'ETH/BTC'})