diff --git a/lambda_tools/configuration.py b/lambda_tools/configuration.py
index 12a6ad4..9143068 100644
--- a/lambda_tools/configuration.py
+++ b/lambda_tools/configuration.py
@@ -237,10 +237,19 @@ class FunctionConfig:
             'nodejs',
             'nodejs4.3',
             'nodejs6.10',
+            'nodejs10.x',
+            'nodejs12.x',
+            'nodejs14.x',
             'java8',
+            'java8.al2',
+            'java11',
             'python2.7',
             'python3.6',
+            'python3.7',
+            'python3.8',
             'dotnetcore1.0',
+            'dotnetcore2.1',
+            'dotnetcore3.1',
             'nodejs4.3-edge'
         ],
         default='python3.6'