diff --git a/src/SchemaManager.php b/src/SchemaManager.php
index 86fb628..f9b3ee5 100644
--- a/src/SchemaManager.php
+++ b/src/SchemaManager.php
@@ -151,7 +151,7 @@ public function findPathInTemplates(string $requestPath, &$path, &$params = []):
         $uriTemplateManager = new UriTemplate();
         foreach ($this->getPathTemplates() as $template) {
             if (isset($this->definition->basePath)) {
-                $fullTemplate = $this->definition->basePath . $template;
+                $fullTemplate = rtrim($this->definition->basePath, '/') . $template;
             } else {
                 $fullTemplate = $template;
             }
diff --git a/tests/fixture/petstore-with-external-docs.json b/tests/fixture/petstore-with-external-docs.json
index 9f3153d..0a4b5d6 100644
--- a/tests/fixture/petstore-with-external-docs.json
+++ b/tests/fixture/petstore-with-external-docs.json
@@ -20,7 +20,7 @@
     "url": "https://swagger.io/about"
   },
   "host": "petstore.swagger.io",
-  "basePath": "/api",
+  "basePath": "/api/",
   "schemes": [
     "http"
   ],