diff --git a/Examples/swagger-spec/petstore/petstore.yaml b/Examples/swagger-spec/petstore/petstore.yaml
index efefad4b..d2952ca5 100644
--- a/Examples/swagger-spec/petstore/petstore.yaml
+++ b/Examples/swagger-spec/petstore/petstore.yaml
@@ -97,9 +97,3 @@ tags:
   -
     name: pets
     description: pets
-  -
-    name: pets
-    description: pets
-  -
-    name: pets
-    description: pets
diff --git a/Examples/using-refs/using-refs.yaml b/Examples/using-refs/using-refs.yaml
index cf0830e2..8b1dc063 100644
--- a/Examples/using-refs/using-refs.yaml
+++ b/Examples/using-refs/using-refs.yaml
@@ -100,9 +100,3 @@ tags:
   -
     name: Products
     description: Products
-  -
-    name: Products
-    description: Products
-  -
-    name: Products
-    description: Products
diff --git a/src/Processors/AugmentTags.php b/src/Processors/AugmentTags.php
index 0aeb8fce..307dde2d 100644
--- a/src/Processors/AugmentTags.php
+++ b/src/Processors/AugmentTags.php
@@ -28,6 +28,7 @@ public function __invoke(Analysis $analysis)
         }
 
         if ($usedTags) {
+            $usedTags = array_unique($usedTags);
             $declaredTags = [];
             if (!Generator::isDefault($analysis->openapi->tags)) {
                 foreach ($analysis->openapi->tags as $tag) {