diff --git a/S7.Net.UnitTest/ConnectionRequestTest.cs b/S7.Net.UnitTest/ConnectionRequestTest.cs
index 4615c3a..db7cabf 100644
--- a/S7.Net.UnitTest/ConnectionRequestTest.cs
+++ b/S7.Net.UnitTest/ConnectionRequestTest.cs
@@ -75,7 +75,7 @@ namespace S7.Net.UnitTest
                 destTsap1, destTsap2, //Destination TASP
                 192, //Parameter Code (tpdu-size)
                 1, //Parameter Length
-                9 //TPDU Size (2^9 = 512)
+                11 //TPDU Size (2^11 = 2048)
             };
         }
     }
diff --git a/S7.Net/Protocol/ConnectionRequest.cs b/S7.Net/Protocol/ConnectionRequest.cs
index f2403b2..0535cb2 100644
--- a/S7.Net/Protocol/ConnectionRequest.cs
+++ b/S7.Net/Protocol/ConnectionRequest.cs
@@ -21,7 +21,7 @@ namespace S7.Net.Protocol
                     3, 0,   //Destination TASP
                     192,    //Parameter Code (tpdu-size)
                     1,      //Parameter Length
-                    9       //TPDU Size (2^9 = 512)
+                    11      //TPDU Size (2^11 = 2048)
                 };
 
             switch (cpu)
diff --git a/S7.Net/S7.Net.csproj b/S7.Net/S7.Net.csproj
index 476986b..d6c6216 100644
--- a/S7.Net/S7.Net.csproj
+++ b/S7.Net/S7.Net.csproj
@@ -25,4 +25,4 @@
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta-62925-02" PrivateAssets="All" />
     <PackageReference Include="SourceLink.Copy.PdbFiles" Version="2.8.3" PrivateAssets="All" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>