diff --git a/patch-scripts/kube-upgrade/KUBE.1.preapply b/patch-scripts/kube-upgrade/KUBE.1.preapply
index 1ddc7d3f..4550a7fc 100644
--- a/patch-scripts/kube-upgrade/KUBE.1.preapply
+++ b/patch-scripts/kube-upgrade/KUBE.1.preapply
@@ -41,8 +41,8 @@ def main():
     if len(running_versions) == 0:
         fatal_error("Could not determine kube-apiserver version")
 
-    # Running version must be at least v1.16.1
-    test_version = 'v1.16.1'
+    # Running version must be at least v1.18.1
+    test_version = 'v1.18.1'
     for running_version in running_versions:
         if LooseVersion(running_version) < LooseVersion(test_version):
             fatal_error("A kube-apiserver is running %s, but must be"
diff --git a/patch-scripts/kube-upgrade/KUBE.1.preremove b/patch-scripts/kube-upgrade/KUBE.1.preremove
index a8d39b89..e1dc1719 100644
--- a/patch-scripts/kube-upgrade/KUBE.1.preremove
+++ b/patch-scripts/kube-upgrade/KUBE.1.preremove
@@ -41,8 +41,8 @@ def main():
     if len(running_versions) == 0:
         fatal_error("Could not determine kube-apiserver version")
 
-    # Running version must be no higher than v1.16.1
-    test_version = 'v1.16.1'
+    # Running version must be no higher than v1.18.1
+    test_version = 'v1.18.1'
     for running_version in running_versions:
         if LooseVersion(running_version) > LooseVersion(test_version):
             fatal_error("A kube-apiserver is running %s, but must be no higher"
diff --git a/patch-scripts/kube-upgrade/KUBE.2.preapply b/patch-scripts/kube-upgrade/KUBE.2.preapply
index 41bba893..86d02a09 100644
--- a/patch-scripts/kube-upgrade/KUBE.2.preapply
+++ b/patch-scripts/kube-upgrade/KUBE.2.preapply
@@ -41,8 +41,8 @@ def main():
     if len(running_versions) == 0:
         fatal_error("Could not determine kube-apiserver version")
 
-    # Running version must be at least v1.16.2
-    test_version = 'v1.16.2'
+    # Running version must be at least v1.18.1-upgrade
+    test_version = 'v1.18.1-upgrade'
     for running_version in running_versions:
         if LooseVersion(running_version) < LooseVersion(test_version):
             fatal_error("A kube-apiserver is running %s, but must be"
diff --git a/patch-scripts/kube-upgrade/KUBE.2.preremove b/patch-scripts/kube-upgrade/KUBE.2.preremove
index 256b8e91..8b20e195 100644
--- a/patch-scripts/kube-upgrade/KUBE.2.preremove
+++ b/patch-scripts/kube-upgrade/KUBE.2.preremove
@@ -41,8 +41,8 @@ def main():
     if len(running_versions) == 0:
         fatal_error("Could not determine kube-apiserver version")
 
-    # Running version must be no higher than v1.16.2
-    test_version = 'v1.16.2'
+    # Running version must be no higher than v1.18.1-upgrade
+    test_version = 'v1.18.1-upgrade'
     for running_version in running_versions:
         if LooseVersion(running_version) > LooseVersion(test_version):
             fatal_error("A kube-apiserver is running %s, but must be"