diff --git a/python/ironic-understack/devbox.json b/python/ironic-understack/devbox.json
index bec8dfe47..4144da4fc 100644
--- a/python/ironic-understack/devbox.json
+++ b/python/ironic-understack/devbox.json
@@ -7,7 +7,7 @@
     "poetry@latest",
     "kubectl@latest",
     "kubeseal@0.28.0",
-    "kustomize@latest",
+    "kustomize@3.10.0",
     "telepresence2@latest"
   ],
   "shell": {
diff --git a/python/understack-workflows/devbox.json b/python/understack-workflows/devbox.json
index 118b475cd..f86282c67 100644
--- a/python/understack-workflows/devbox.json
+++ b/python/understack-workflows/devbox.json
@@ -8,7 +8,7 @@
     "argocd@latest",
     "kubectl@latest",
     "kubeseal@0.28.0",
-    "kustomize@latest",
+    "kustomize@3.10.0",
     "telepresence2@latest",
     "jq@latest",
     "poetry@1.8.3"