diff --git a/java/com/google/gerrit/server/plugins/PluginGuiceEnvironment.java b/java/com/google/gerrit/server/plugins/PluginGuiceEnvironment.java
index 89d6f8f..59e3342 100644
--- a/java/com/google/gerrit/server/plugins/PluginGuiceEnvironment.java
+++ b/java/com/google/gerrit/server/plugins/PluginGuiceEnvironment.java
@@ -362,6 +362,23 @@
       reattachItem(old, sysItems, newPlugin.getSysInjector(), newPlugin);
       reattachItem(old, sshItems, newPlugin.getSshInjector(), newPlugin);
       reattachItem(old, httpItems, newPlugin.getHttpInjector(), newPlugin);
+
+      apiInjector = Optional.ofNullable(newPlugin.getApiInjector()).orElse(apiInjector);
+
+      if (apiInjector != null) {
+        apiItems.putAll(dynamicItemsOf(apiInjector));
+        apiSets.putAll(dynamicSetsOf(apiInjector));
+        apiMaps.putAll(dynamicMapsOf(apiInjector));
+
+        List<Injector> allPluginInjectors =
+            listOfInjectors(
+                newPlugin.getSysInjector(),
+                newPlugin.getSshInjector(),
+                newPlugin.getHttpInjector());
+        allPluginInjectors.forEach(i -> reattachItem(old, apiItems, i, newPlugin));
+        allPluginInjectors.forEach(i -> reattachSet(old, apiSets, i, newPlugin));
+        allPluginInjectors.forEach(i -> reattachMap(old, apiMaps, i, newPlugin));
+      }
     } finally {
       exit(oldContext);
     }