diff --git a/src/security/transform/hex-encode.hpp b/src/security/transform/hex-encode.hpp
index 95fc6e8..14a9b41 100644
--- a/src/security/transform/hex-encode.hpp
+++ b/src/security/transform/hex-encode.hpp
@@ -51,7 +51,7 @@
    *
    * @return The number of input bytes that have been accepted by the converter.
    */
-  virtual size_t
+  size_t
   convert(const uint8_t* data, size_t dataLen) final;
 
   /**