diff --git a/moto/awslambda/models.py b/moto/awslambda/models.py
index f291f3beb..8dfa4724a 100644
--- a/moto/awslambda/models.py
+++ b/moto/awslambda/models.py
@@ -45,7 +45,7 @@ except ImportError:
 
 _stderr_regex = re.compile(r'START|END|REPORT RequestId: .*')
 _orig_adapter_send = requests.adapters.HTTPAdapter.send
-docker_3 = docker.__version__.startswith("3")
+docker_3 = docker.__version__[0] >= '3'
 
 
 def zip2tar(zip_bytes):