diff --git a/backend/src/api/guilds.ts b/backend/src/api/guilds.ts
index bb1f5c4a..6eabfa24 100644
--- a/backend/src/api/guilds.ts
+++ b/backend/src/api/guilds.ts
@@ -76,12 +76,14 @@ export function initGuildsAPI(app: express.Express) {
       parsedConfig = {};
     }
 
-    const errors = validateGuildConfig(parsedConfig);
+    const errors = await validateGuildConfig(parsedConfig);
+
     if (errors) {
       return res.status(422).json({ errors });
     }
 
     await configs.saveNewRevision(`guild-${req.params.guildId}`, config, req.user.userId);
+
     ok(res);
   });
 
diff --git a/backend/src/configValidator.ts b/backend/src/configValidator.ts
index b6931819..3a0227b9 100644
--- a/backend/src/configValidator.ts
+++ b/backend/src/configValidator.ts
@@ -3,7 +3,7 @@ import { guildPlugins } from "./plugins/availablePlugins";
 import { decodeAndValidateStrict, StrictValidationError } from "./validatorUtils";
 import { ZeppelinPlugin } from "./plugins/ZeppelinPlugin";
 import { IZeppelinGuildConfig } from "./types";
-import { PluginOptions } from "knub";
+import { configUtils, PluginOptions } from "knub";
 
 const pluginNameToPlugin = new Map<string, ZeppelinPlugin>();
 for (const plugin of guildPlugins) {
@@ -26,7 +26,7 @@ const globalConfigRootSchema = t.type({
 
 const partialMegaTest = t.partial({ name: t.string });
 
-export function validateGuildConfig(config: any): string[] | null {
+export async function validateGuildConfig(config: any): Promise<string[] | null> {
   const validationResult = decodeAndValidateStrict(partialGuildConfigRootSchema, config);
   if (validationResult instanceof StrictValidationError) return validationResult.getErrors();
 
@@ -40,7 +40,8 @@ export function validateGuildConfig(config: any): string[] | null {
 
       const plugin = pluginNameToPlugin.get(pluginName);
       try {
-        plugin.configPreprocessor(pluginOptions as PluginOptions<any>);
+        const mergedOptions = configUtils.mergeConfig(plugin.defaultOptions || {}, pluginOptions);
+        await plugin.configPreprocessor(mergedOptions as PluginOptions<any>);
       } catch (err) {
         if (err instanceof StrictValidationError) {
           return err.getErrors().map(err => {
diff --git a/backend/src/pluginUtils.ts b/backend/src/pluginUtils.ts
index 86fbba80..60bd504f 100644
--- a/backend/src/pluginUtils.ts
+++ b/backend/src/pluginUtils.ts
@@ -40,6 +40,7 @@ export function getPluginConfigPreprocessor(
       ? decodeAndValidateStrict(blueprint.configSchema, options.config)
       : options.config;
     if (decodedConfig instanceof StrictValidationError) {
+      console.log("o", options);
       throw decodedConfig;
     }