diff --git a/.env b/.env
index 6608f93..9790c34 100644
--- a/.env
+++ b/.env
@@ -1,4 +1,4 @@
-DOCKER_TAG=v3.8.1
+DOCKER_TAG=v4.2.1
 REPOSITORY_DOCKER_URL=ghcr.io/nasa-ammos
 
 AERIE_USERNAME=aerie
diff --git a/src/aerie_cli/aerie_host.py b/src/aerie_cli/aerie_host.py
index 149878c..785d177 100644
--- a/src/aerie_cli/aerie_host.py
+++ b/src/aerie_cli/aerie_host.py
@@ -12,7 +12,12 @@
     "3.7.0",
     "3.7.1",
     "3.8.0",
-    "3.8.1"
+    "3.8.1",
+    "4.0.0",
+    "4.1.0",
+    "4.1.1",
+    "4.2.0",
+    "4.2.1"
 ]
 
 class AerieHostVersionError(RuntimeError):
diff --git a/tests/integration_tests/files/models/banananation-4.0.0.jar b/tests/integration_tests/files/models/banananation-4.0.0.jar
new file mode 100644
index 0000000..95f30dd
Binary files /dev/null and b/tests/integration_tests/files/models/banananation-4.0.0.jar differ
diff --git a/tests/integration_tests/files/models/banananation-4.1.0.jar b/tests/integration_tests/files/models/banananation-4.1.0.jar
new file mode 100644
index 0000000..84d7323
Binary files /dev/null and b/tests/integration_tests/files/models/banananation-4.1.0.jar differ
diff --git a/tests/integration_tests/files/models/banananation-4.1.1.jar b/tests/integration_tests/files/models/banananation-4.1.1.jar
new file mode 100644
index 0000000..00bf1e0
Binary files /dev/null and b/tests/integration_tests/files/models/banananation-4.1.1.jar differ
diff --git a/tests/integration_tests/files/models/banananation-4.2.0.jar b/tests/integration_tests/files/models/banananation-4.2.0.jar
new file mode 100644
index 0000000..d23cd1d
Binary files /dev/null and b/tests/integration_tests/files/models/banananation-4.2.0.jar differ
diff --git a/tests/integration_tests/files/models/banananation-4.2.1.jar b/tests/integration_tests/files/models/banananation-4.2.1.jar
new file mode 100644
index 0000000..7b165a5
Binary files /dev/null and b/tests/integration_tests/files/models/banananation-4.2.1.jar differ