diff --git a/Makefile b/Makefile
index 4795c63c..6765d4d7 100644
--- a/Makefile
+++ b/Makefile
@@ -41,7 +41,7 @@ integration-test: build
 integration-test-py3: build-py3
 	docker run -t --rm -v /var/run/docker.sock:/var/run/docker.sock docker-sdk-python3 py.test -v tests/integration/${file}
 
-TEST_API_VERSION ?= 1.35
+TEST_API_VERSION ?= 1.39
 TEST_ENGINE_VERSION ?= 19.03.12
 
 .PHONY: setup-network
diff --git a/docker/constants.py b/docker/constants.py
index e4daed5d..c09eedab 100644
--- a/docker/constants.py
+++ b/docker/constants.py
@@ -1,7 +1,7 @@
 import sys
 from .version import version
 
-DEFAULT_DOCKER_API_VERSION = '1.35'
+DEFAULT_DOCKER_API_VERSION = '1.39'
 MINIMUM_DOCKER_API_VERSION = '1.21'
 DEFAULT_TIMEOUT_SECONDS = 60
 STREAM_HEADER_SIZE_BYTES = 8