diff --git a/src/factory/MySQLTaskImpl.cc b/src/factory/MySQLTaskImpl.cc
index ad3dd231ed..d167f8c581 100644
--- a/src/factory/MySQLTaskImpl.cc
+++ b/src/factory/MySQLTaskImpl.cc
@@ -213,9 +213,6 @@ CommMessageOut *ComplexMySQLTask::message_out()
 		auth_switch_req->set_password(password_);
 		auth_switch_req->set_auth_plugin_name(std::move(conn->str));
 		auth_switch_req->set_seed(conn->seed);
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
-		WFGlobal::get_ssl_client_ctx();
-#endif
 		break;
 
 	case ST_SHA256_PUBLIC_KEY_REQUEST:
diff --git a/src/manager/RouteManager.h b/src/manager/RouteManager.h
index cd660d4316..8286539172 100644
--- a/src/manager/RouteManager.h
+++ b/src/manager/RouteManager.h
@@ -46,7 +46,6 @@ class RouteManager
 
 	class RouteTarget : public CommSchedTarget
 	{
-#if OPENSSL_VERSION_NUMBER >= 0x10100000L
 	public:
 		int init(const struct sockaddr *addr, socklen_t addrlen, SSL_CTX *ssl_ctx,
 				 int connect_timeout, int ssl_connect_timeout, int response_timeout,
@@ -70,7 +69,6 @@ class RouteManager
 			if (ssl_ctx)
 				SSL_CTX_free(ssl_ctx);
 		}
-#endif
 
 	public:
 		int state;
diff --git a/src/manager/WFGlobal.cc b/src/manager/WFGlobal.cc
index c776f5d7a1..f8abbe888a 100644
--- a/src/manager/WFGlobal.cc
+++ b/src/manager/WFGlobal.cc
@@ -31,12 +31,6 @@
 #include <mutex>
 #include <condition_variable>
 #include <openssl/ssl.h>
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
-# include <openssl/err.h>
-# include <openssl/engine.h>
-# include <openssl/conf.h>
-# include <openssl/crypto.h>
-#endif
 #include "CommScheduler.h"
 #include "Executor.h"
 #include "WFResourcePool.h"
@@ -179,18 +173,6 @@ __WFGlobal::__WFGlobal()
 	sync_max_ = 0;
 }
 
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
-static std::mutex *__ssl_mutex;
-
-static void ssl_locking_callback(int mode, int type, const char* file, int line)
-{
-	if (mode & CRYPTO_LOCK)
-		__ssl_mutex[type].lock();
-	else if (mode & CRYPTO_UNLOCK)
-		__ssl_mutex[type].unlock();
-}
-#endif
-
 class __SSLManager
 {
 public:
@@ -206,15 +188,6 @@ class __SSLManager
 private:
 	__SSLManager()
 	{
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
-		__ssl_mutex = new std::mutex[CRYPTO_num_locks()];
-		CRYPTO_set_locking_callback(ssl_locking_callback);
-		SSL_library_init();
-		SSL_load_error_strings();
-		//ERR_load_crypto_strings();
-		//OpenSSL_add_all_algorithms();
-#endif
-
 		ssl_client_ctx_ = SSL_CTX_new(SSLv23_client_method());
 		if (ssl_client_ctx_ == NULL)
 			abort();
@@ -223,29 +196,6 @@ class __SSLManager
 	~__SSLManager()
 	{
 		SSL_CTX_free(ssl_client_ctx_);
-
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
-		//free ssl to avoid memory leak
-		FIPS_mode_set(0);
-		CRYPTO_set_locking_callback(NULL);
-# ifdef CRYPTO_LOCK_ECDH
-		CRYPTO_THREADID_set_callback(NULL);
-# else
-		CRYPTO_set_id_callback(NULL);
-# endif
-		ENGINE_cleanup();
-		CONF_modules_unload(1);
-		ERR_free_strings();
-		EVP_cleanup();
-# ifdef CRYPTO_LOCK_ECDH
-		ERR_remove_thread_state(NULL);
-# else
-		ERR_remove_state(0);
-# endif
-		CRYPTO_cleanup_all_ex_data();
-		sk_SSL_COMP_free(SSL_COMP_get_compression_methods());
-		delete []__ssl_mutex;
-#endif
 	}
 
 private:
diff --git a/src/protocol/MySQLMessage.cc b/src/protocol/MySQLMessage.cc
index 22a78781a9..0e20eb3997 100644
--- a/src/protocol/MySQLMessage.cc
+++ b/src/protocol/MySQLMessage.cc
@@ -583,7 +583,7 @@ int MySQLRSAAuthRequest::encode(struct iovec vectors[], int max)
 	EVP_PKEY_CTX *pkey_ctx;
 	int ret = -1;
 
-	bio = BIO_new_mem_buf((void *)public_key_.c_str(), public_key_.size());
+	bio = BIO_new_mem_buf(public_key_.c_str(), public_key_.size());
 	if (bio)
 	{
 		pkey = PEM_read_bio_PUBKEY(bio, NULL, NULL, NULL);
diff --git a/src/protocol/SSLWrapper.cc b/src/protocol/SSLWrapper.cc
index 6c29be5a9c..f7a80474f7 100644
--- a/src/protocol/SSLWrapper.cc
+++ b/src/protocol/SSLWrapper.cc
@@ -25,17 +25,6 @@
 namespace protocol
 {
 
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
-static inline BIO *__get_wbio(SSL *ssl)
-{
-	BIO *wbio = SSL_get_wbio(ssl);
-	BIO *next = BIO_next(wbio);
-	return next ? next : wbio;
-}
-
-# define SSL_get_wbio(ssl)	__get_wbio(ssl)
-#endif
-
 int SSLHandshaker::encode(struct iovec vectors[], int max)
 {
 	BIO *wbio = SSL_get_wbio(this->ssl);