diff --git a/package-lock.json b/package-lock.json
index 515e47fc..1da7a64a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3853,6 +3853,11 @@
       "integrity": "sha1-JJXduvbrh0q7Dhvp3yLS5aVEMmw=",
       "dev": true
     },
+    "deep-diff": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/deep-diff/-/deep-diff-1.0.2.tgz",
+      "integrity": "sha512-aWS3UIVH+NPGCD1kki+DCU9Dua032iSsO43LqQpcs4R3+dVv7tX0qBGjiVHJHjplsoUM2XRO/KB92glqc68awg=="
+    },
     "deep-extend": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.6.0.tgz",
diff --git a/package.json b/package.json
index 37d6f875..c29277a1 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,7 @@
   "dependencies": {
     "cors": "^2.8.5",
     "cross-env": "^5.2.0",
+    "deep-diff": "^1.0.2",
     "dotenv": "^4.0.0",
     "emoji-regex": "^8.0.0",
     "eris": "^0.10.1",
diff --git a/src/configValidator.ts b/src/configValidator.ts
index bd1aad7c..0e60ad48 100644
--- a/src/configValidator.ts
+++ b/src/configValidator.ts
@@ -18,7 +18,7 @@ const guildConfigRootSchema = t.type({
   levels: t.record(t.string, t.number),
   plugins: t.record(t.string, t.unknown),
 });
-const partialGuildConfigRootSchema = t.exact(t.partial(guildConfigRootSchema.props));
+const partialGuildConfigRootSchema = t.partial(guildConfigRootSchema.props);
 
 const globalConfigRootSchema = t.type({
   url: t.string,
diff --git a/src/plugins/ZeppelinPlugin.ts b/src/plugins/ZeppelinPlugin.ts
index a5ddd86a..325a8f17 100644
--- a/src/plugins/ZeppelinPlugin.ts
+++ b/src/plugins/ZeppelinPlugin.ts
@@ -63,7 +63,7 @@ export class ZeppelinPlugin<TConfig extends {} = IBasePluginConfig> extends Plug
               {},
               (this.getStaticDefaultOptions() as any).config || {},
               options.config || {},
-              ...options.overrides.slice(0, i),
+              ...options.overrides.slice(0, i).map(o => o.config || {}),
               override.config,
             );
             const errors = validateStrict(this.configSchema, merged);
diff --git a/src/validatorUtils.ts b/src/validatorUtils.ts
index 94aa9cd8..ddbddf44 100644
--- a/src/validatorUtils.ts
+++ b/src/validatorUtils.ts
@@ -2,6 +2,7 @@ import * as t from "io-ts";
 import { pipe } from "fp-ts/lib/pipeable";
 import { fold } from "fp-ts/lib/Either";
 import { noop } from "./utils";
+import deepDiff from "deep-diff";
 
 // From io-ts/lib/PathReporter
 function stringify(v) {
@@ -42,8 +43,8 @@ const report = fold((errors: any) => {
  * Validates the given value against the given schema while also disallowing extra properties
  * See: https://github.com/gcanti/io-ts/issues/322
  */
-export function validateStrict(schema: t.Type<any, any, any>, value: any): string[] | null {
-  const validationResult = schema.decode(value);
+export function validateStrict(schema: t.HasProps, value: any): string[] | null {
+  const validationResult = t.exact(schema).decode(value);
   return pipe(
     validationResult,
     fold(
@@ -51,8 +52,9 @@ export function validateStrict(schema: t.Type<any, any, any>, value: any): strin
       result => {
         // Make sure there are no extra properties
         if (JSON.stringify(value) !== JSON.stringify(result)) {
-          // TODO: Actually mention what the unknown property is
-          return ["Found unknown properties"];
+          const diff = deepDiff(result, value);
+          const errors = diff.filter(d => d.kind === "N").map(d => `Unknown property <${d.path.join(".")}>`);
+          return errors.length ? errors : ["Found unknown properties"];
         }
 
         return null;