diff --git a/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/buffer/package.scala b/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/buffer/package.scala
index 3c31e7dfd..1686dadfd 100644
--- a/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/buffer/package.scala
+++ b/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/buffer/package.scala
@@ -15,7 +15,7 @@ package object buffer {
   /**
     * Buffer Extensions
     */
-  implicit final class BufferExtensions(val buffer: Buffer) extends AnyVal {
+  implicit final class BufferExtensions(private val buffer: Buffer) extends AnyVal {
 
     /**
       * Syntactic sugar for concatenating a buffer
@@ -71,13 +71,13 @@ package object buffer {
     * Note that this is a property on the buffer module returned by require('buffer'), not on the
     * Buffer global or a Buffer instance.
     */
-  val INSPECT_MAX_BYTES = BufferNamespace.INSPECT_MAX_BYTES
+  val INSPECT_MAX_BYTES: UID = BufferNamespace.INSPECT_MAX_BYTES
 
   /**
     * On 32-bit architectures, this value is (2^30)-1 (~1GB). On 64-bit architectures, this value is (2^31)-1 (~2GB).F
     * Note that this is a property on the buffer module returned by require('buffer'), not on the Buffer global or a Buffer instance.
     */
-  val kMaxLength = BufferNamespace.kMaxLength
+  val kMaxLength: Double = BufferNamespace.kMaxLength
 
   @js.native
   @JSImport("buffer", JSImport.Namespace)
diff --git a/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/http/package.scala b/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/http/package.scala
index 3e677cfb0..dc1b40063 100644
--- a/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/http/package.scala
+++ b/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/http/package.scala
@@ -19,7 +19,7 @@ package object http {
   /**
     * Http Extensions
     */
-  implicit final class HttpExtensions(val http: Http) extends AnyVal {
+  implicit final class HttpExtensions(private val http: Http) extends AnyVal {
 
     /**
       * @see [[Http.createServer()]]
diff --git a/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/https/package.scala b/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/https/package.scala
index 6ba894e23..22fda52e3 100644
--- a/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/https/package.scala
+++ b/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/https/package.scala
@@ -17,7 +17,7 @@ package object https {
   /**
     * Https Extensions
     */
-  implicit final class HttpExtensions(val https: Https) extends AnyVal {
+  implicit final class HttpExtensions(private val https: Https) extends AnyVal {
 
     /**
       * Like http.get() but for HTTPS.
diff --git a/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/package.scala b/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/package.scala
index 4b9c6abe9..7de93aa55 100644
--- a/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/package.scala
+++ b/app/nodejs-v14/src/main/scala/io/scalajs/nodejs/package.scala
@@ -98,7 +98,7 @@ package object nodejs {
   @JSGlobal("setTimeout")
   object setTimeout extends SetTimeout
 
-  implicit final class ErrorExtensions(val error: Error) extends AnyVal {
+  implicit final class ErrorExtensions(private val error: Error) extends AnyVal {
     @inline
     def toException(): Exception = js.JavaScriptException(error.message)
   }