diff --git a/src/features/PluginSettings/index.tsx b/src/features/PluginSettings/index.tsx
index 04691f16423..6986f2ddb5c 100644
--- a/src/features/PluginSettings/index.tsx
+++ b/src/features/PluginSettings/index.tsx
@@ -74,7 +74,7 @@ const PluginSettingsConfig = memo<PluginSettingsConfigProps>(({ schema, id }) =>
             maximum={item.maximum}
             minimum={item.minimum}
             onChange={(value) => {
-              updatePluginSettings(id, { ...pluginSetting, [item.name]: value });
+              updatePluginSettings(id, { [item.name]: value });
             }}
             type={item.type as any}
           />
diff --git a/src/store/tool/slices/plugin/action.ts b/src/store/tool/slices/plugin/action.ts
index 217bb38c798..289e21f89b0 100644
--- a/src/store/tool/slices/plugin/action.ts
+++ b/src/store/tool/slices/plugin/action.ts
@@ -3,6 +3,7 @@ import useSWR, { SWRResponse } from 'swr';
 import { StateCreator } from 'zustand/vanilla';
 
 import { pluginService } from '@/services/plugin';
+import { merge } from '@/utils/merge';
 
 import { ToolStore } from '../../store';
 import { pluginStoreSelectors } from '../store/selectors';
@@ -44,7 +45,11 @@ export const createPluginSlice: StateCreator<
     await get().refreshPlugins();
   },
   updatePluginSettings: async (id, settings) => {
-    await pluginService.updatePluginSettings(id, settings);
+    const previousSettings = pluginSelectors.getPluginSettingsById(id)(get());
+
+    const nextSettings = merge(previousSettings, settings);
+    await pluginService.updatePluginSettings(id, nextSettings);
+
     await get().refreshPlugins();
   },
   useCheckPluginsIsInstalled: (plugins) => useSWR(plugins, get().checkPluginsIsInstalled),