diff --git a/2016/puzzle-05-01.cc b/2016/puzzle-05-01.cc
index b9d66bc..7d4c482 100644
--- a/2016/puzzle-05-01.cc
+++ b/2016/puzzle-05-01.cc
@@ -15,7 +15,7 @@ auto md5(MD5Digest& digest, std::string const& s) -> unsigned int
 
   EVP_MD_CTX* md_context{EVP_MD_CTX_new()};
   assert(md_context != nullptr);
-  EVP_DigestInit_ex2(md_context, md, nullptr);
+  EVP_DigestInit_ex(md_context, md, nullptr);
   EVP_DigestUpdate(md_context, s.data(), s.length());
   EVP_DigestFinal_ex(md_context, digest.data(), &md_len);
   return md_len;
@@ -56,4 +56,4 @@ auto main() -> int
 
   std::cout << "Password: " << result << '\n';
   return 0;
-}
\ No newline at end of file
+}
diff --git a/2016/puzzle-05-02.cc b/2016/puzzle-05-02.cc
index 374dc5c..9ecc146 100644
--- a/2016/puzzle-05-02.cc
+++ b/2016/puzzle-05-02.cc
@@ -15,7 +15,7 @@ auto md5(MD5Digest& digest, std::string const& s) -> unsigned int
 
   EVP_MD_CTX* md_context{EVP_MD_CTX_new()};
   assert(md_context != nullptr);
-  EVP_DigestInit_ex2(md_context, md, nullptr);
+  EVP_DigestInit_ex(md_context, md, nullptr);
   EVP_DigestUpdate(md_context, s.data(), s.length());
   EVP_DigestFinal_ex(md_context, digest.data(), &md_len);
   return md_len;
@@ -53,4 +53,4 @@ auto main() -> int
 
   std::cout << "\nPassword: " << result << '\n';
   return 0;
-}
\ No newline at end of file
+}
diff --git a/2016/puzzle-14-01.cc b/2016/puzzle-14-01.cc
index 33e64ab..172d3cd 100644
--- a/2016/puzzle-14-01.cc
+++ b/2016/puzzle-14-01.cc
@@ -20,7 +20,7 @@ auto md5(std::string const& s) -> std::string
 
   EVP_MD_CTX* md_context{EVP_MD_CTX_new()};
   assert(md_context != nullptr);
-  EVP_DigestInit_ex2(md_context, md, nullptr);
+  EVP_DigestInit_ex(md_context, md, nullptr);
   EVP_DigestUpdate(md_context, s.data(), s.length());
   EVP_DigestFinal_ex(md_context, digest.data(), &md_len);
   std::string result;
diff --git a/2016/puzzle-14-02.cc b/2016/puzzle-14-02.cc
index c518d01..9dae5bd 100644
--- a/2016/puzzle-14-02.cc
+++ b/2016/puzzle-14-02.cc
@@ -21,7 +21,7 @@ auto md5(std::string const& s) -> std::string
 
   EVP_MD_CTX* md_context{EVP_MD_CTX_new()};
   assert(md_context != nullptr);
-  EVP_DigestInit_ex2(md_context, md, nullptr);
+  EVP_DigestInit_ex(md_context, md, nullptr);
   EVP_DigestUpdate(md_context, s.data(), s.length());
   EVP_DigestFinal_ex(md_context, digest.data(), &md_len);
   std::string result;
diff --git a/2016/puzzle-17-01.cc b/2016/puzzle-17-01.cc
index 9593066..20c3bed 100644
--- a/2016/puzzle-17-01.cc
+++ b/2016/puzzle-17-01.cc
@@ -22,7 +22,7 @@ auto md5_directions(std::string const& s) -> Directions
 
   EVP_MD_CTX* md_context{EVP_MD_CTX_new()};
   assert(md_context != nullptr);
-  EVP_DigestInit_ex2(md_context, md, nullptr);
+  EVP_DigestInit_ex(md_context, md, nullptr);
   EVP_DigestUpdate(md_context, s.data(), s.length());
   EVP_DigestFinal_ex(md_context, digest.data(), &md_len);
   Directions d{Directions::none};
diff --git a/2016/puzzle-17-02.cc b/2016/puzzle-17-02.cc
index d8399e6..d50f3db 100644
--- a/2016/puzzle-17-02.cc
+++ b/2016/puzzle-17-02.cc
@@ -22,7 +22,7 @@ auto md5_directions(std::string const& s) -> Directions
 
   EVP_MD_CTX* md_context{EVP_MD_CTX_new()};
   assert(md_context != nullptr);
-  EVP_DigestInit_ex2(md_context, md, nullptr);
+  EVP_DigestInit_ex(md_context, md, nullptr);
   EVP_DigestUpdate(md_context, s.data(), s.length());
   EVP_DigestFinal_ex(md_context, digest.data(), &md_len);
   Directions d{Directions::none};