diff --git a/apisix/schema_def.lua b/apisix/schema_def.lua
index a15fa8336006..991ab430f20c 100644
--- a/apisix/schema_def.lua
+++ b/apisix/schema_def.lua
@@ -314,9 +314,9 @@ local upstream_schema = {
         timeout = {
             type = "object",
             properties = {
-                connect = {type = "number", minimum = 0},
-                send = {type = "number", minimum = 0},
-                read = {type = "number", minimum = 0},
+                connect = {type = "number", exclusiveMinimum = 0},
+                send = {type = "number", exclusiveMinimum = 0},
+                read = {type = "number", exclusiveMinimum = 0},
             },
             required = {"connect", "send", "read"},
         },
diff --git a/t/admin/upstream2.t b/t/admin/upstream2.t
index f4e9366197fa..3ea83b571321 100644
--- a/t/admin/upstream2.t
+++ b/t/admin/upstream2.t
@@ -253,3 +253,36 @@ GET /index.html
 --- error_code: 502
 --- error_log
 no valid upstream node
+
+
+
+=== TEST 9: upstream timeouts equal to zero
+--- config
+    location /t {
+        content_by_lua_block {
+            local t = require("lib.test_admin").test
+            local code, body = t('/apisix/admin/upstreams/1',
+                 ngx.HTTP_PUT,
+                 [[{
+                    "nodes": {
+                        "127.0.0.1:8080": 1
+                    },
+                    "type": "roundrobin",
+                    "timeout": {
+                        "connect": 0,
+                        "send": 0,
+                        "read": 0
+                    }
+                }]]
+                )
+            ngx.status = code
+            ngx.print(body)
+        }
+    }
+--- request
+GET /t
+--- error_code: 400
+--- response_body_like eval
+qr/{"error_msg":"invalid configuration: property \\\"timeout\\\" validation failed: property \\\"(connect|send|read)\\\" validation failed: expected 0 to be sctrictly greater than 0"}/
+--- no_error_log
+[error]