diff --git a/requirements.txt b/requirements.txt
index 5e8ec2ed7..6007ee3ff 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ cached-property==1.3.0
 certifi==2017.4.17
 chardet==3.0.4
 colorama==0.4.0; sys_platform == 'win32'
-docker==3.7.2
+docker==3.7.3
 docker-pycreds==0.4.0
 dockerpty==0.4.1
 docopt==0.6.2
@@ -21,4 +21,4 @@ requests==2.20.0
 six==1.10.0
 texttable==0.9.1
 urllib3==1.21.1; python_version == '3.3'
-websocket-client==0.32.0
+websocket-client==0.56.0
diff --git a/tests/acceptance/cli_test.py b/tests/acceptance/cli_test.py
index 5142f96eb..9ed257369 100644
--- a/tests/acceptance/cli_test.py
+++ b/tests/acceptance/cli_test.py
@@ -40,7 +40,7 @@ ProcessResult = namedtuple('ProcessResult', 'stdout stderr')
 
 
 BUILD_CACHE_TEXT = 'Using cache'
-BUILD_PULL_TEXT = 'Status: Image is up to date for busybox:latest'
+BUILD_PULL_TEXT = 'Status: Image is up to date for busybox:1.27.2'
 
 
 def start_process(base_dir, options):
@@ -658,15 +658,15 @@ class CLITestCase(DockerClientTestCase):
         self.base_dir = 'tests/fixtures/links-composefile'
         result = self.dispatch(['pull', '--no-parallel', 'web'])
         assert sorted(result.stderr.split('\n'))[1:] == [
-            'Pulling web (busybox:latest)...',
+            'Pulling web (busybox:1.27.2)...',
         ]
 
     def test_pull_with_include_deps(self):
         self.base_dir = 'tests/fixtures/links-composefile'
         result = self.dispatch(['pull', '--no-parallel', '--include-deps', 'web'])
         assert sorted(result.stderr.split('\n'))[1:] == [
-            'Pulling db (busybox:latest)...',
-            'Pulling web (busybox:latest)...',
+            'Pulling db (busybox:1.27.2)...',
+            'Pulling web (busybox:1.27.2)...',
         ]
 
     def test_build_plain(self):
@@ -2592,7 +2592,7 @@ class CLITestCase(DockerClientTestCase):
 
         container, = self.project.containers()
         expected_template = ' container {} {}'
-        expected_meta_info = ['image=busybox:latest', 'name=simple-composefile_simple_']
+        expected_meta_info = ['image=busybox:1.27.2', 'name=simple-composefile_simple_']
 
         assert expected_template.format('create', container.id) in lines[0]
         assert expected_template.format('start', container.id) in lines[1]
diff --git a/tests/fixtures/environment-exec/docker-compose.yml b/tests/fixtures/environment-exec/docker-compose.yml
index 813606eb8..e284ba8cb 100644
--- a/tests/fixtures/environment-exec/docker-compose.yml
+++ b/tests/fixtures/environment-exec/docker-compose.yml
@@ -2,7 +2,7 @@ version: "2.2"
 
 services:
   service:
-    image: busybox:latest
+    image: busybox:1.27.2
     command: top
 
     environment:
diff --git a/tests/fixtures/links-composefile/docker-compose.yml b/tests/fixtures/links-composefile/docker-compose.yml
index 930fd4c7a..0a2f3d9ef 100644
--- a/tests/fixtures/links-composefile/docker-compose.yml
+++ b/tests/fixtures/links-composefile/docker-compose.yml
@@ -1,11 +1,11 @@
 db:
-  image: busybox:latest
+  image: busybox:1.27.2
   command: top
 web:
-  image: busybox:latest
+  image: busybox:1.27.2
   command: top
   links:
     - db:db
 console:
-  image: busybox:latest
+  image: busybox:1.27.2
   command: top
diff --git a/tests/fixtures/simple-composefile/docker-compose.yml b/tests/fixtures/simple-composefile/docker-compose.yml
index b25beaf4b..e86d3fc80 100644
--- a/tests/fixtures/simple-composefile/docker-compose.yml
+++ b/tests/fixtures/simple-composefile/docker-compose.yml
@@ -1,5 +1,5 @@
 simple:
-  image: busybox:latest
+  image: busybox:1.27.2
   command: top
 another:
   image: busybox:latest
diff --git a/tests/fixtures/simple-dockerfile/Dockerfile b/tests/fixtures/simple-dockerfile/Dockerfile
index dd864b838..098ff3eb1 100644
--- a/tests/fixtures/simple-dockerfile/Dockerfile
+++ b/tests/fixtures/simple-dockerfile/Dockerfile
@@ -1,3 +1,3 @@
-FROM busybox:latest
+FROM busybox:1.27.2
 LABEL com.docker.compose.test_image=true
 CMD echo "success"
diff --git a/tests/fixtures/v2-simple/docker-compose.yml b/tests/fixtures/v2-simple/docker-compose.yml
index c99ae02fc..ac754eeea 100644
--- a/tests/fixtures/v2-simple/docker-compose.yml
+++ b/tests/fixtures/v2-simple/docker-compose.yml
@@ -1,8 +1,8 @@
 version: "2"
 services:
   simple:
-    image: busybox:latest
+    image: busybox:1.27.2
     command: top
   another:
-    image: busybox:latest
+    image: busybox:1.27.2
     command: top