diff --git a/examples/generated-javascript-project/index.js b/examples/generated-javascript-project/index.js
index 56ae86a..15c0415 100644
--- a/examples/generated-javascript-project/index.js
+++ b/examples/generated-javascript-project/index.js
@@ -11,7 +11,7 @@ const pluginOptions = {
 };
 
 export default async function (fastify, opts) {
-	fastify.register(openapiGlue, pluginOptions);
+	fastify.register(openapiGlue, { ...pluginOptions, ...opts });
 }
 
 export const options = {
diff --git a/lib/templates/js/index.js b/lib/templates/js/index.js
index 6c1bfd6..a900bec 100644
--- a/lib/templates/js/index.js
+++ b/lib/templates/js/index.js
@@ -1,4 +1,5 @@
-export default (data) => `// Fastify plugin autogenerated by fastify-openapi-glue
+export default (data) =>
+	`// Fastify plugin autogenerated by fastify-openapi-glue
 import openapiGlue from "${data.pluginPackageName}";
 import { Security } from "./${data.securityFile}";
 import { Service } from "./${data.serviceFile}";
@@ -11,7 +12,7 @@ const pluginOptions = {
 };
 
 export default async function (fastify, opts) {
-	fastify.register(openapiGlue, pluginOptions);
+	fastify.register(openapiGlue, { ...pluginOptions, ...opts });
 }
 
 export const options = {
diff --git a/test/test-swagger-noBasePath.v2.javascript.checksums.json b/test/test-swagger-noBasePath.v2.javascript.checksums.json
index 78c2695..923a0e8 100644
--- a/test/test-swagger-noBasePath.v2.javascript.checksums.json
+++ b/test/test-swagger-noBasePath.v2.javascript.checksums.json
@@ -14,7 +14,7 @@
 		},
 		"plugin": {
 			"fileName": "index.js",
-			"checksum": "87d81a605881e6ba5d6af1266c3fcc30f95b6441290811bb1e5b7e1ce9940cfe"
+			"checksum": "aaf6dbb034952530335e39a4a48f1b0ac065d00072d0d6156489391de8721451"
 		},
 		"readme": {
 			"fileName": "README.md",
diff --git a/test/test-swagger.v2.javascript.checksums.json b/test/test-swagger.v2.javascript.checksums.json
index 89595f2..2d6ac3c 100644
--- a/test/test-swagger.v2.javascript.checksums.json
+++ b/test/test-swagger.v2.javascript.checksums.json
@@ -14,7 +14,7 @@
 		},
 		"plugin": {
 			"fileName": "index.js",
-			"checksum": "87d81a605881e6ba5d6af1266c3fcc30f95b6441290811bb1e5b7e1ce9940cfe"
+			"checksum": "aaf6dbb034952530335e39a4a48f1b0ac065d00072d0d6156489391de8721451"
 		},
 		"readme": {
 			"fileName": "README.md",