--- a/src/stream/ngx_stream_upstream_hash_module.c
+++ b/src/stream/ngx_stream_upstream_hash_module.c
@@ -241,6 +241,10 @@ ngx_stream_upstream_get_hash_peer(ngx_pe
             goto next;
         }
 
+        if (peer->max_conns && peer->conns >= peer->max_conns) {
+            goto next;
+        }
+
         break;
 
     next:
@@ -549,6 +553,10 @@ ngx_stream_upstream_get_chash_peer(ngx_p
                 continue;
             }
 
+            if (peer->max_conns && peer->conns >= peer->max_conns) {
+                continue;
+            }
+
             peer->current_weight += peer->effective_weight;
             total += peer->effective_weight;
 
@@ -646,6 +654,7 @@ ngx_stream_upstream_hash(ngx_conf_t *cf,
 
     uscf->flags = NGX_STREAM_UPSTREAM_CREATE
                   |NGX_STREAM_UPSTREAM_WEIGHT
+                  |NGX_STREAM_UPSTREAM_MAX_CONNS
                   |NGX_STREAM_UPSTREAM_MAX_FAILS
                   |NGX_STREAM_UPSTREAM_FAIL_TIMEOUT
                   |NGX_STREAM_UPSTREAM_DOWN;