diff --git a/src/security/v2/certificate.cpp b/src/security/v2/certificate.cpp
index b5188e9..b6a08ab 100644
--- a/src/security/v2/certificate.cpp
+++ b/src/security/v2/certificate.cpp
@@ -98,7 +98,7 @@
   return getName().at(ISSUER_ID_OFFSET);
 }
 
-const Buffer
+Buffer
 Certificate::getPublicKey() const
 {
   if (getContent().value_size() == 0)
diff --git a/src/security/v2/certificate.hpp b/src/security/v2/certificate.hpp
index 4e1b0eb..c451277 100644
--- a/src/security/v2/certificate.hpp
+++ b/src/security/v2/certificate.hpp
@@ -132,7 +132,7 @@
    * @brief Get public key bits (in PKCS#8 format)
    * @throw Error If content is empty
    */
-  const Buffer
+  Buffer
   getPublicKey() const;
 
   /**