diff --git a/certs_manager.hpp b/certs_manager.hpp
index da47d35..91c5e43 100644
--- a/certs_manager.hpp
+++ b/certs_manager.hpp
@@ -62,7 +62,7 @@
      *
      *  @param[in] filePath - Certificate key file path.
      */
-    void install(const std::string filePath) override;
+    std::string install(const std::string filePath) override;
 
     /** @brief Delete the certificate (and possibly revert
      *         to a self-signed certificate).