diff --git a/Source/levels/gendung.cpp b/Source/levels/gendung.cpp
index b2294cc4cfd..6faf76ef0a9 100644
--- a/Source/levels/gendung.cpp
+++ b/Source/levels/gendung.cpp
@@ -547,7 +547,7 @@ void LoadTransparency(const uint16_t *dunData)
 
 	for (WorldTileCoord j = 0; j < size.height; j++) {
 		for (WorldTileCoord i = 0; i < size.width; i++) {
-			dTransVal[16 + i][16 + j] = SDL_SwapLE16(*transparentLayer);
+			dTransVal[16 + i][16 + j] = static_cast<int8_t>(SDL_SwapLE16(*transparentLayer));
 			transparentLayer++;
 		}
 	}
diff --git a/Source/options.cpp b/Source/options.cpp
index 467474366db..396e06bcc32 100644
--- a/Source/options.cpp
+++ b/Source/options.cpp
@@ -162,7 +162,7 @@ float GetIniFloat(const char *sectionName, const char *keyName, float defaultVal
 	return (float)GetIni().GetDoubleValue(sectionName, keyName, defaultValue);
 }
 
-bool GetIniValue(std::string_view sectionName, std::string_view keyName, char *string, int stringSize, const char *defaultString = "")
+bool GetIniValue(std::string_view sectionName, std::string_view keyName, char *string, size_t stringSize, const char *defaultString = "")
 {
 	std::string sectionNameStr { sectionName };
 	std::string keyNameStr { keyName };
@@ -941,7 +941,7 @@ std::string_view OptionEntryAudioDevice::GetDeviceName(size_t index) const
 {
 #if SDL_VERSION_ATLEAST(2, 0, 0)
 	if (index != 0)
-		return SDL_GetAudioDeviceName(index - 1, false);
+		return SDL_GetAudioDeviceName(static_cast<int>(index) - 1, false);
 #endif
 	return "";
 }
diff --git a/Source/panels/charpanel.cpp b/Source/panels/charpanel.cpp
index e726475775d..10c3e513963 100644
--- a/Source/panels/charpanel.cpp
+++ b/Source/panels/charpanel.cpp
@@ -242,7 +242,7 @@ void DrawShadowString(const Surface &out, const PanelEntry &entry)
 
 	// If the text is less tall than the field, we center it vertically relative to the field.
 	// Otherwise, we draw from the top of the field.
-	const int textHeight = (c_count(wrapped, '\n') + 1) * GetLineHeight(wrapped, GameFont12);
+	const int textHeight = static_cast<int>((c_count(wrapped, '\n') + 1) * GetLineHeight(wrapped, GameFont12));
 	const int labelHeight = std::max(PanelFieldHeight, textHeight);
 
 	DrawString(out, text, { labelPosition + Displacement { -2, 2 }, { entry.labelLength, labelHeight } },
diff --git a/Source/panels/console.cpp b/Source/panels/console.cpp
index 32b44657d2f..3d7e414f82c 100644
--- a/Source/panels/console.cpp
+++ b/Source/panels/console.cpp
@@ -321,7 +321,7 @@ const ConsoleLine &GetConsoleLineFromEnd(int index)
 void SetHistoryIndex(int index)
 {
 	CurrentInputTextState = InputTextState::RestoredFromHistory;
-	HistoryIndex = std::ssize(ConsoleLines) - (index + 1);
+	HistoryIndex = static_cast<int>(std::ssize(ConsoleLines)) - (index + 1);
 	if (HistoryIndex == -1) {
 		ConsoleInputState.assign(DraftInput);
 		return;
@@ -335,7 +335,7 @@ void PrevHistoryItem(tl::function_ref<bool(const ConsoleLine &line)> filter)
 	if (HistoryIndex == -1) {
 		DraftInput = ConsoleInputState.value();
 	}
-	const int n = std::ssize(ConsoleLines);
+	const int n = static_cast<int>(std::ssize(ConsoleLines));
 	for (int i = HistoryIndex + 1; i < n; ++i) {
 		const int index = n - (i + 1);
 		if (filter(ConsoleLines[index])) {
@@ -347,7 +347,7 @@ void PrevHistoryItem(tl::function_ref<bool(const ConsoleLine &line)> filter)
 
 void NextHistoryItem(tl::function_ref<bool(const ConsoleLine &line)> filter)
 {
-	const int n = std::ssize(ConsoleLines);
+	const int n = static_cast<int>(std::ssize(ConsoleLines));
 	for (int i = n - HistoryIndex; i < n; ++i) {
 		if (filter(ConsoleLines[i])) {
 			SetHistoryIndex(i);
diff --git a/Source/plrmsg.cpp b/Source/plrmsg.cpp
index df79e0a0110..a1facb39ffb 100644
--- a/Source/plrmsg.cpp
+++ b/Source/plrmsg.cpp
@@ -40,7 +40,7 @@ std::array<PlayerMessage, 8> Messages;
 
 int CountLinesOfText(std::string_view text)
 {
-	return 1 + c_count(text, '\n');
+	return static_cast<int>(1 + c_count(text, '\n'));
 }
 
 PlayerMessage &GetNextMessage()
diff --git a/Source/qol/autopickup.cpp b/Source/qol/autopickup.cpp
index 4b204c267b1..f86bf60076e 100644
--- a/Source/qol/autopickup.cpp
+++ b/Source/qol/autopickup.cpp
@@ -103,7 +103,7 @@ void AutoPickup(const Player &player)
 			int itemIndex = dItem[tile.x][tile.y] - 1;
 			auto &item = Items[itemIndex];
 			if (DoPickup(item)) {
-				NetSendCmdGItem(true, CMD_REQUESTAGITEM, player.getId(), itemIndex);
+				NetSendCmdGItem(true, CMD_REQUESTAGITEM, static_cast<uint8_t>(player.getId()), itemIndex);
 				item._iRequest = true;
 			}
 		}
diff --git a/Source/track.cpp b/Source/track.cpp
index f139d577fb8..bc7403926eb 100644
--- a/Source/track.cpp
+++ b/Source/track.cpp
@@ -92,7 +92,7 @@ void RepeatMouseAction()
 		break;
 	case MouseActionType::AttackPlayerTarget:
 		if (PlayerUnderCursor != nullptr && !myPlayer.friendlyMode)
-			NetSendCmdParam1(true, rangedAttack ? CMD_RATTACKPID : CMD_ATTACKPID, PlayerUnderCursor->getId());
+			NetSendCmdParam1(true, rangedAttack ? CMD_RATTACKPID : CMD_ATTACKPID, static_cast<uint16_t>(PlayerUnderCursor->getId()));
 		break;
 	case MouseActionType::Spell:
 		if (ControlMode != ControlTypes::KeyboardAndMouse) {