diff --git a/ed25519.h b/ed25519.h
index ccc6a37..6d30c0d 100644
--- a/ed25519.h
+++ b/ed25519.h
@@ -33,8 +33,8 @@ public:
     std::string getSecretKeyBase64String()                   const noexcept;
 
 private:
-    std::array<uint8_t, 32> m_secret;
-    std::array<uint8_t, 32> m_public;
+    std::array<uint8_t, 32> m_secret {0};
+    std::array<uint8_t, 32> m_public {0};
 };
 
 class Signature {
@@ -49,7 +49,7 @@ public:
     bool operator==(const std::string& base64String)           const noexcept;
 
 private:
-    std::shared_ptr<std::array<uint8_t, 64>> m_data;
+    std::shared_ptr<std::array<uint8_t, 64>> m_data {0};
 };
 
 //// FUNCTIONS
diff --git a/x25519.h b/x25519.h
index 012ebab..00d0bdc 100644
--- a/x25519.h
+++ b/x25519.h
@@ -40,7 +40,7 @@ public:
     std::string getSecretKeyBase64String()                                                const noexcept;
 
 private:
-    std::array<uint8_t, 32> m_publicKey;
+    std::array<uint8_t, 32> m_publicKey {0};
     EVP_PKEY_CTX * m_Ctx;
     EVP_PKEY * m_Pkey;
 };