diff --git a/Source/dvlnet/base.cpp b/Source/dvlnet/base.cpp
index f940709fd6b..bdbb953d669 100644
--- a/Source/dvlnet/base.cpp
+++ b/Source/dvlnet/base.cpp
@@ -512,7 +512,7 @@ bool base::SNetGetOwnerTurnsWaiting(uint32_t *turns)
 	plr_t owner = GetOwner();
 	PlayerState &playerState = playerStateTable_[owner];
 	std::deque<turn_t> &turnQueue = playerState.turnQueue;
-	*turns = turnQueue.size();
+	*turns = static_cast<uint32_t>(turnQueue.size());
 
 	return true;
 }
@@ -521,7 +521,7 @@ bool base::SNetGetTurnsInTransit(uint32_t *turns)
 {
 	PlayerState &playerState = playerStateTable_[plr_self];
 	std::deque<turn_t> &turnQueue = playerState.turnQueue;
-	*turns = turnQueue.size();
+	*turns = static_cast<uint32_t>(turnQueue.size());
 	return true;
 }
 
diff --git a/Source/dvlnet/frame_queue.cpp b/Source/dvlnet/frame_queue.cpp
index fb9518e8602..97b8359ddb0 100644
--- a/Source/dvlnet/frame_queue.cpp
+++ b/Source/dvlnet/frame_queue.cpp
@@ -29,8 +29,9 @@ tl::expected<buffer_t, PacketError> frame_queue::Read(framesize_t s)
 		return tl::make_unexpected(FrameQueueError());
 	buffer_t ret;
 	while (s > 0 && s >= buffer_deque.front().size()) {
-		s -= buffer_deque.front().size();
-		current_size -= buffer_deque.front().size();
+		framesize_t bufferSize = static_cast<framesize_t>(buffer_deque.front().size());
+		s -= bufferSize;
+		current_size -= bufferSize;
 		ret.insert(ret.end(),
 		    buffer_deque.front().begin(),
 		    buffer_deque.front().end());
@@ -49,7 +50,7 @@ tl::expected<buffer_t, PacketError> frame_queue::Read(framesize_t s)
 
 void frame_queue::Write(buffer_t buf)
 {
-	current_size += buf.size();
+	current_size += static_cast<framesize_t>(buf.size());
 	buffer_deque.push_back(std::move(buf));
 }
 
@@ -80,9 +81,9 @@ tl::expected<buffer_t, PacketError> frame_queue::ReadPacket()
 tl::expected<buffer_t, PacketError> frame_queue::MakeFrame(buffer_t packetbuf)
 {
 	buffer_t ret;
-	if (packetbuf.size() > max_frame_size)
+	framesize_t size = static_cast<framesize_t>(packetbuf.size());
+	if (size > max_frame_size)
 		return tl::make_unexpected("Buffer exceeds maximum frame size");
-	framesize_t size = packetbuf.size();
 	ret.insert(ret.end(), packet_out::begin(size), packet_out::end(size));
 	ret.insert(ret.end(), packetbuf.begin(), packetbuf.end());
 	return ret;
diff --git a/Source/dvlnet/protocol_zt.cpp b/Source/dvlnet/protocol_zt.cpp
index 0da1f152ce0..134614bccaa 100644
--- a/Source/dvlnet/protocol_zt.cpp
+++ b/Source/dvlnet/protocol_zt.cpp
@@ -357,8 +357,8 @@ std::string protocol_zt::make_default_gamename()
 	std::string ret;
 	std::string allowedChars = "abcdefghkopqrstuvwxyz";
 	std::random_device rd;
-	std::uniform_int_distribution<int> dist(0, allowedChars.size() - 1);
-	for (int i = 0; i < 5; ++i) {
+	std::uniform_int_distribution<size_t> dist(0, allowedChars.size() - 1);
+	for (size_t i = 0; i < 5; ++i) {
 		ret += allowedChars.at(dist(rd));
 	}
 	return ret;
diff --git a/Source/storm/storm_net.hpp b/Source/storm/storm_net.hpp
index 4e3a76cd500..b4e34c053dd 100644
--- a/Source/storm/storm_net.hpp
+++ b/Source/storm/storm_net.hpp
@@ -39,7 +39,7 @@ struct _SNETEVENT {
 	uint32_t eventid;
 	uint32_t playerid;
 	void *data;
-	uint32_t databytes;
+	size_t databytes;
 };
 
 #define PS_CONNECTED 0x10000