diff --git a/charts/apisix-ingress-controller/Chart.yaml b/charts/apisix-ingress-controller/Chart.yaml
index bdf27e43..65c719fb 100644
--- a/charts/apisix-ingress-controller/Chart.yaml
+++ b/charts/apisix-ingress-controller/Chart.yaml
@@ -24,7 +24,7 @@ keywords:
   - nginx
   - crd
 type: application
-version: 1.2.1
+version: 1.2.2
 appVersion: 2.1.0
 sources:
   - https://github.com/apache/apisix-helm-chart
diff --git a/charts/apisix-ingress-controller/crds/apisixic-crds.yaml b/charts/apisix-ingress-controller/crds/apisixic-crds.yaml
index 70141547..575d5f0d 100644
--- a/charts/apisix-ingress-controller/crds/apisixic-crds.yaml
+++ b/charts/apisix-ingress-controller/crds/apisixic-crds.yaml
@@ -2033,12 +2033,18 @@ spec:
                       description: |-
                         Scheme is the protocol used to communicate with the upstream.
                         Default is `http`.
-                        Can be `http`, `https`, `grpc`, or `grpcs`.
+                        For L7 proxy, it can be `http`, `https`, `grpc`, or `grpcs`.
+                        For L4 proxy, it can be `tcp`, `tls`, or `udp`.
+                        The L4 values apply to stream routes only; using them for an HTTP route
+                        makes the upstream unreachable.
                       enum:
                       - http
                       - https
                       - grpc
                       - grpcs
+                      - tcp
+                      - tls
+                      - udp
                       type: string
                     subsets:
                       description: |-
@@ -2112,12 +2118,18 @@ spec:
                 description: |-
                   Scheme is the protocol used to communicate with the upstream.
                   Default is `http`.
-                  Can be `http`, `https`, `grpc`, or `grpcs`.
+                  For L7 proxy, it can be `http`, `https`, `grpc`, or `grpcs`.
+                  For L4 proxy, it can be `tcp`, `tls`, or `udp`.
+                  The L4 values apply to stream routes only; using them for an HTTP route
+                  makes the upstream unreachable.
                 enum:
                 - http
                 - https
                 - grpc
                 - grpcs
+                - tcp
+                - tls
+                - udp
                 type: string
               subsets:
                 description: |-
@@ -2529,12 +2541,18 @@ spec:
                 description: |-
                   Scheme is the protocol used to communicate with the upstream.
                   Default is `http`.
-                  Can be `http`, `https`, `grpc`, or `grpcs`.
+                  For L7 proxy, it can be `http`, `https`, `grpc`, or `grpcs`.
+                  For L4 proxy, it can be `tcp`, `tls`, or `udp`.
+                  The L4 values apply to stream routes only; using them for an HTTP route
+                  makes the upstream unreachable.
                 enum:
                 - http
                 - https
                 - grpc
                 - grpcs
+                - tcp
+                - tls
+                - udp
                 type: string
               targetRefs:
                 description: |-