diff --git a/src/DirectPlay8Peer.cpp b/src/DirectPlay8Peer.cpp
index ffba20d..e7b0598 100644
--- a/src/DirectPlay8Peer.cpp
+++ b/src/DirectPlay8Peer.cpp
@@ -1,5 +1,5 @@
 /* DirectPlay Lite
- * Copyright (C) 2018 Daniel Collins <solemnwarning@solemnwarning.net>
+ * Copyright (C) 2018-2023 Daniel Collins <solemnwarning@solemnwarning.net>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -497,7 +497,7 @@ HRESULT DirectPlay8Peer::Connect(CONST DPN_APPLICATION_DESC* CONST pdnAppDesc, I
 		
 		log_printf("port = %d", (int)(port_value));
 		
-		r_port = port_value;
+		r_port = (uint16_t)(port_value);
 	}
 	else{
 		return DPNERR_INVALIDHOSTADDRESS;
@@ -3146,7 +3146,7 @@ void DirectPlay8Peer::handle_udp_socket_event()
 		try {
 			pd.reset(new PacketDeserialiser(recv_buf, r));
 		}
-		catch(const PacketDeserialiser::Error &e)
+		catch(const PacketDeserialiser::Error &)
 		{
 			/* Malformed packet received */
 			return;
@@ -3197,7 +3197,7 @@ void DirectPlay8Peer::handle_other_socket_event()
 			try {
 				pd.reset(new PacketDeserialiser(recv_buf, r));
 			}
-			catch(const PacketDeserialiser::Error &e)
+			catch(const PacketDeserialiser::Error &)
 			{
 				/* Malformed packet received */
 				return;
diff --git a/src/HostEnumerator.cpp b/src/HostEnumerator.cpp
index 27d3439..779edc9 100644
--- a/src/HostEnumerator.cpp
+++ b/src/HostEnumerator.cpp
@@ -1,5 +1,5 @@
 /* DirectPlay Lite
- * Copyright (C) 2018 Daniel Collins <solemnwarning@solemnwarning.net>
+ * Copyright (C) 2018-2023 Daniel Collins <solemnwarning@solemnwarning.net>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -133,7 +133,7 @@ HostEnumerator::HostEnumerator(
 				throw COMAPIException(DPNERR_INVALIDHOSTADDRESS);
 			}
 			
-			send_addr.sin_port = htons(port_value);
+			send_addr.sin_port = htons((uint16_t)(port_value));
 		}
 	}
 	
@@ -284,7 +284,7 @@ void HostEnumerator::handle_packet(const void *data, size_t size, struct sockadd
 	try {
 		pd.reset(new PacketDeserialiser(data, size));
 	}
-	catch(const PacketDeserialiser::Error &e)
+	catch(const PacketDeserialiser::Error &)
 	{
 		/* Malformed packet received */
 		return;
@@ -333,7 +333,7 @@ void HostEnumerator::handle_packet(const void *data, size_t size, struct sockadd
 		
 		request_tick_count = pd->get_dword(8);
 	}
-	catch(const PacketDeserialiser::Error &e)
+	catch(const PacketDeserialiser::Error &)
 	{
 		/* Malformed packet received */
 		return;
diff --git a/src/packet.hpp b/src/packet.hpp
index 6145ec2..4512820 100644
--- a/src/packet.hpp
+++ b/src/packet.hpp
@@ -1,5 +1,5 @@
 /* DirectPlay Lite
- * Copyright (C) 2018 Daniel Collins <solemnwarning@solemnwarning.net>
+ * Copyright (C) 2018-2023 Daniel Collins <solemnwarning@solemnwarning.net>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -31,6 +31,8 @@ struct TLVChunk
 {
 	uint32_t type;
 	uint32_t value_length;
+
+#pragma warning(suppress: 4200)
 	unsigned char value[0];
 };
 
diff --git a/tests/DirectPlay8Peer.cpp b/tests/DirectPlay8Peer.cpp
index 99fd611..b249717 100644
--- a/tests/DirectPlay8Peer.cpp
+++ b/tests/DirectPlay8Peer.cpp
@@ -1,5 +1,5 @@
 /* DirectPlay Lite
- * Copyright (C) 2018 Daniel Collins <solemnwarning@solemnwarning.net>
+ * Copyright (C) 2018-2023 Daniel Collins <solemnwarning@solemnwarning.net>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -28,6 +28,8 @@
 #include "../src/DirectPlay8Address.hpp"
 #include "../src/DirectPlay8Peer.hpp"
 
+#pragma warning(disable: 4065) /* switch statement contains 'default' but no 'case' labels */
+
 // #define INSTANTIATE_FROM_COM
 
 #define PORT 42895
@@ -9163,8 +9165,6 @@ TEST(DirectPlay8Peer, DestroyGroupBeforeJoin)
 	
 	TestPeer peer1("peer1");
 	
-	DPNID p1_cg_dpnidGroup;
-	
 	peer1.expect_begin();
 	peer1.expect_push([&host](DWORD dwMessageType, PVOID pMessage)
 	{