diff -Naupr transmisson-remote-gui-5.6.0_orig/synapse/source/lib/blcksock.pas transmisson-remote-gui-5.6.0/synapse/source/lib/blcksock.pas
--- transmisson-remote-gui-5.6.0_orig/synapse/source/lib/blcksock.pas	2017-04-15 17:28:12.000000000 +0700
+++ transmisson-remote-gui-5.6.0/synapse/source/lib/blcksock.pas	2017-04-29 12:55:14.663103205 +0700
@@ -239,9 +239,6 @@ type
 
   {:Specify requested SSL/TLS version for secure connection.}
   TSSLType = (
-    LT_all,
-    LT_SSLv2,
-    LT_SSLv3,
     LT_TLSv1,
     LT_TLSv1_1,
     LT_TLSv1_2,
@@ -4135,7 +4132,7 @@ begin
   FLastError := 0;
   FLastErrorDesc := '';
   FVerifyCert := False;
-  FSSLType := LT_all;
+  FSSLType := LT_TLSv1;
   FKeyPassword := '';
   FCiphers := '';
   FCertificateFile := '';
diff -Naupr transmisson-remote-gui-5.6.0_orig/synapse/source/lib/ssl_cryptlib.pas transmisson-remote-gui-5.6.0/synapse/source/lib/ssl_cryptlib.pas
--- transmisson-remote-gui-5.6.0_orig/synapse/source/lib/ssl_cryptlib.pas	2017-04-15 17:28:12.000000000 +0700
+++ transmisson-remote-gui-5.6.0/synapse/source/lib/ssl_cryptlib.pas	2017-04-29 12:54:23.906175491 +0700
@@ -296,7 +296,7 @@ begin
   FcryptSession := CRYPT_SESSION(CRYPT_SESSION_NONE);
   if server then
     case FSSLType of
-      LT_all, LT_SSLv3, LT_TLSv1, LT_TLSv1_1:
+      LT_TLSv1, LT_TLSv1_1, LT_TLSv1_2:
         st := CRYPT_SESSION_SSL_SERVER;
       LT_SSHv2:
         st := CRYPT_SESSION_SSH_SERVER;
@@ -305,7 +305,7 @@ begin
     end
   else
     case FSSLType of
-      LT_all, LT_SSLv3, LT_TLSv1, LT_TLSv1_1:
+      LT_TLSv1, LT_TLSv1_1, TL_TLSv1_2:
         st := CRYPT_SESSION_SSL;
       LT_SSHv2:
         st := CRYPT_SESSION_SSH;
@@ -316,12 +316,12 @@ begin
     Exit;
   x := -1;
   case FSSLType of
-    LT_SSLv3:
-      x := 0;
     LT_TLSv1:
-      x := 1;
+      x := 0;
     LT_TLSv1_1:
-      x := 2;
+      x := 1;
+    LT_TLSv1_2:
+      x := 3;
   end;
   if x >= 0 then
     if not SSLCheck(cryptSetAttribute(FCryptSession, CRYPT_SESSINFO_VERSION, x)) then
@@ -507,14 +507,14 @@ begin
   if FcryptSession = CRYPT_SESSION(CRYPT_SESSION_NONE) then
     Exit;
   cryptGetAttribute(FCryptSession, CRYPT_SESSINFO_VERSION, x);
-  if FSSLType in [LT_SSLv3, LT_TLSv1, LT_TLSv1_1, LT_all] then
+  if FSSLType in [LT_TLSv1, LT_TLSv1_1, LT_TLSv1_2] then
     case x of
       0:
-        Result := 'SSLv3';
-      1:
         Result := 'TLSv1';
-      2:
+      1:
         Result := 'TLSv1.1';
+      2:
+        Result := 'TLSv1.2';
     end;
   if FSSLType in [LT_SSHv2] then
     case x of
diff -Naupr transmisson-remote-gui-5.6.0_orig/synapse/source/lib/ssl_openssl.pas transmisson-remote-gui-5.6.0/synapse/source/lib/ssl_openssl.pas
--- transmisson-remote-gui-5.6.0_orig/synapse/source/lib/ssl_openssl.pas	2017-04-15 17:28:12.000000000 +0700
+++ transmisson-remote-gui-5.6.0/synapse/source/lib/ssl_openssl.pas	2017-04-29 12:50:26.444964932 +0700
@@ -420,18 +420,12 @@ begin
   FLastError := 0;
   Fctx := nil;
   case FSSLType of
-    LT_SSLv2:
-      Fctx := SslCtxNew(SslMethodV2);
-    LT_SSLv3:
-      Fctx := SslCtxNew(SslMethodV3);
     LT_TLSv1:
       Fctx := SslCtxNew(SslMethodTLSV1);
     LT_TLSv1_1:
       Fctx := SslCtxNew(SslMethodTLSV11);
     LT_TLSv1_2:
       Fctx := SslCtxNew(SslMethodTLSV12);
-    LT_all:
-      Fctx := SslCtxNew(SslMethodV23);
   else
     Exit;
   end;