diff --git a/image_verify.hpp b/image_verify.hpp
index 5426c6d..88762e1 100644
--- a/image_verify.hpp
+++ b/image_verify.hpp
@@ -189,7 +189,7 @@
      * @param[in]  - publickey
      * @param[out] - RSA Object.
      */
-    inline RSA* createPublicRSA(const fs::path& publicKey);
+    inline EVP_PKEY_Ptr createPublicRSA(const fs::path& publicKey);
 
     /**
      * @brief Memory map the  file