diff --git a/build/charts/antrea/crds/externalippool.yaml b/build/charts/antrea/crds/externalippool.yaml
index dcd69a55866..7c6fbe96db1 100644
--- a/build/charts/antrea/crds/externalippool.yaml
+++ b/build/charts/antrea/crds/externalippool.yaml
@@ -158,6 +158,7 @@ spec:
                     matchLabels:
                       additionalProperties:
                         type: string
+                        pattern: "^(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])?$"
                       type: object
             status:
               type: object
diff --git a/build/yamls/antrea-aks.yml b/build/yamls/antrea-aks.yml
index a1de92ef433..ae8b29a9d79 100644
--- a/build/yamls/antrea-aks.yml
+++ b/build/yamls/antrea-aks.yml
@@ -1432,6 +1432,7 @@ spec:
                     matchLabels:
                       additionalProperties:
                         type: string
+                        pattern: "^(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])?$"
                       type: object
             status:
               type: object
diff --git a/build/yamls/antrea-crds.yml b/build/yamls/antrea-crds.yml
index 78d9a438259..9457bd61e55 100644
--- a/build/yamls/antrea-crds.yml
+++ b/build/yamls/antrea-crds.yml
@@ -1419,6 +1419,7 @@ spec:
                     matchLabels:
                       additionalProperties:
                         type: string
+                        pattern: "^(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])?$"
                       type: object
             status:
               type: object
diff --git a/build/yamls/antrea-eks.yml b/build/yamls/antrea-eks.yml
index 711625560c3..a2145a936dc 100644
--- a/build/yamls/antrea-eks.yml
+++ b/build/yamls/antrea-eks.yml
@@ -1432,6 +1432,7 @@ spec:
                     matchLabels:
                       additionalProperties:
                         type: string
+                        pattern: "^(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])?$"
                       type: object
             status:
               type: object
diff --git a/build/yamls/antrea-gke.yml b/build/yamls/antrea-gke.yml
index 88016c79b93..0cff63fc1b3 100644
--- a/build/yamls/antrea-gke.yml
+++ b/build/yamls/antrea-gke.yml
@@ -1432,6 +1432,7 @@ spec:
                     matchLabels:
                       additionalProperties:
                         type: string
+                        pattern: "^(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])?$"
                       type: object
             status:
               type: object
diff --git a/build/yamls/antrea-ipsec.yml b/build/yamls/antrea-ipsec.yml
index 56e352210e3..89e61c130a6 100644
--- a/build/yamls/antrea-ipsec.yml
+++ b/build/yamls/antrea-ipsec.yml
@@ -1432,6 +1432,7 @@ spec:
                     matchLabels:
                       additionalProperties:
                         type: string
+                        pattern: "^(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])?$"
                       type: object
             status:
               type: object
diff --git a/build/yamls/antrea.yml b/build/yamls/antrea.yml
index 84aa664b319..04cb57eea84 100644
--- a/build/yamls/antrea.yml
+++ b/build/yamls/antrea.yml
@@ -1432,6 +1432,7 @@ spec:
                     matchLabels:
                       additionalProperties:
                         type: string
+                        pattern: "^(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])?$"
                       type: object
             status:
               type: object