diff --git a/src/drivers/Qt/TasEditor/TasEditorWindow.cpp b/src/drivers/Qt/TasEditor/TasEditorWindow.cpp
index 17b30083..e2952af2 100644
--- a/src/drivers/Qt/TasEditor/TasEditorWindow.cpp
+++ b/src/drivers/Qt/TasEditor/TasEditorWindow.cpp
@@ -2274,7 +2274,7 @@ void TasEditorWindow::exportMovieFile(void)
 			markerID = markersManager.getMarkerAtFrame(i);
 			if (markerID)
 			{
-				sprintf( framenum, "%i ", i );
+				snprintf( framenum, sizeof(framenum), "%i ", i );
 				//_itoa(i, framenum, 10);
 				//strcat(framenum, " ");
 				subtitle = framenum;
@@ -2337,7 +2337,7 @@ void TasEditorWindow::buildRecentProjectMenu(void)
 
 	for (int i=0; i<10; i++)
 	{
-		sprintf(buf, "SDL.RecentTasProject%02i", i);
+		snprintf(buf, sizeof(buf), "SDL.RecentTasProject%02i", i);
 
 		g_config->getOption( buf, &s);
 
@@ -2373,7 +2373,7 @@ void TasEditorWindow::saveRecentProjectMenu(void)
 	for (it=projList.begin(); it != projList.end(); it++)
 	{
 		s = *it;
-		sprintf(buf, "SDL.RecentTasProject%02i", i);
+		snprintf(buf, sizeof(buf), "SDL.RecentTasProject%02i", i);
 
 		g_config->setOption( buf, s->c_str() );
 
@@ -6651,7 +6651,7 @@ void QPianoRoll::paintEvent(QPaintEvent *event)
 
 		//rect = QRect( -pxLineXScroll + pxFrameColX, y, pxWidthFrameCol, pxLineSpacing );
 
-		sprintf( stmp, "%07i", lineNum );
+		snprintf( stmp, sizeof(stmp), "%07i", lineNum );
 
 		rect = painter.fontMetrics().boundingRect( tr(stmp) );
 
@@ -7492,7 +7492,7 @@ void markerDragPopup::paintEvent(QPaintEvent *event)
 	w = event->rect().width();
 	h = event->rect().height();
 
-	sprintf( txt, "%07i", rowIndex );
+	snprintf( txt, sizeof(txt), "%07i", rowIndex );
 
 	//painter.setFont(font);
 	//I want to make the title bar pasted on the content
diff --git a/src/drivers/Qt/TasEditor/bookmarks.cpp b/src/drivers/Qt/TasEditor/bookmarks.cpp
index f2880b94..898c64f0 100644
--- a/src/drivers/Qt/TasEditor/bookmarks.cpp
+++ b/src/drivers/Qt/TasEditor/bookmarks.cpp
@@ -658,7 +658,7 @@ void BOOKMARKS::paintEvent(QPaintEvent *event)
 		}
 
 		x = pxStartCol1 + pxCharWidth;
-		sprintf( txt, "%i", item );
+		snprintf( txt, sizeof(txt), "%i", item );
 
 		painter.drawText( x, y+pxLineTextOfs, tr(txt) );
 
diff --git a/src/drivers/Qt/TasEditor/branches.cpp b/src/drivers/Qt/TasEditor/branches.cpp
index 2e3758e9..9e547464 100644
--- a/src/drivers/Qt/TasEditor/branches.cpp
+++ b/src/drivers/Qt/TasEditor/branches.cpp
@@ -1023,11 +1023,11 @@ void BRANCHES::paintEvent(QPaintEvent *event)
 			char framenum_string[16] = {0};
 			if (bookmarks->itemUnderMouse < TOTAL_BOOKMARKS)
 			{
-				sprintf( framenum_string, "%07i", bookmarks->bookmarksArray[bookmarks->itemUnderMouse].snapshot.keyFrame );
+				snprintf( framenum_string, sizeof(framenum_string), "%07i", bookmarks->bookmarksArray[bookmarks->itemUnderMouse].snapshot.keyFrame );
 			}
 			else
 			{
-				sprintf( framenum_string, "%07i", currFrameCounter );
+				snprintf( framenum_string, sizeof(framenum_string), "%07i", currFrameCounter );
 			}
 			x = viewRect.x() + (2 * pxBoxWidth);
 			y = pxLineSpacing;
diff --git a/src/drivers/Qt/TasEditor/history.cpp b/src/drivers/Qt/TasEditor/history.cpp
index b1b7bff0..f5d2d6e3 100644
--- a/src/drivers/Qt/TasEditor/history.cpp
+++ b/src/drivers/Qt/TasEditor/history.cpp
@@ -522,7 +522,7 @@ int HISTORY::registerChanges(int mod_type, int start, int end, int size, const c
 		if (mod_type == MODTYPE_INSERTNUM)
 		{
 			snap.endFrame = start + size - 1;
-			sprintf( framenum, "%i", size);
+			snprintf( framenum, sizeof(framenum), "%i", size);
 			strcat(snap.description, framenum);
 		} else
 		{
@@ -540,12 +540,12 @@ int HISTORY::registerChanges(int mod_type, int start, int end, int size, const c
 				snap.endFrame = snapshots[real_pos].endFrame;
 			// add upper and lower frame to description
 			strcat(snap.description, " ");
-			sprintf( framenum, "%i", snap.startFrame);
+			snprintf( framenum, sizeof(framenum), "%i", snap.startFrame);
 			strcat(snap.description, framenum);
 			if (snap.endFrame > snap.startFrame)
 			{
 				strcat(snap.description, "-");
-				sprintf( framenum, "%i", snap.endFrame);
+				snprintf( framenum, sizeof(framenum), "%i", snap.endFrame);
 				strcat(snap.description, framenum);
 			}
 			// add comment if there is one specified
@@ -570,12 +570,12 @@ int HISTORY::registerChanges(int mod_type, int start, int end, int size, const c
 			// don't combine
 			// add upper and lower frame to description
 			strcat(snap.description, " ");
-			sprintf( framenum, "%i", snap.startFrame);
+			snprintf( framenum, sizeof(framenum), "%i", snap.startFrame);
 			strcat(snap.description, framenum);
 			if (snap.endFrame > snap.startFrame)
 			{
 				strcat(snap.description, "-");
-				sprintf( framenum, "%i", snap.endFrame);
+				snprintf( framenum, sizeof(framenum), "%i", snap.endFrame);
 				strcat(snap.description, framenum);
 			}
 			// add comment if there is one specified
@@ -681,7 +681,7 @@ void HISTORY::registerMarkersChange(int modificationType, int start, int end, co
 	// add the frame to description
 	char framenum[16];
 	strcat(snap.description, " ");
-	sprintf( framenum, "%i", snap.startFrame);
+	snprintf( framenum, sizeof(framenum), "%i", snap.startFrame);
 	strcat(snap.description, framenum);
 	if (snap.endFrame > snap.startFrame || modificationType == MODTYPE_MARKER_DRAG || modificationType == MODTYPE_MARKER_SWAP)
 	{
@@ -691,7 +691,7 @@ void HISTORY::registerMarkersChange(int modificationType, int start, int end, co
 			strcat(snap.description, "<->");
 		else
 			strcat(snap.description, "-");
-		sprintf( framenum, "%i", snap.endFrame);
+		snprintf( framenum, sizeof(framenum), "%i", snap.endFrame);
 		strcat(snap.description, framenum);
 	}
 	// add comment if there is one specified
@@ -718,7 +718,7 @@ void HISTORY::registerBookmarkSet(int slot, BOOKMARK& backupCopy, int oldCurrent
 	snap.startFrame = snap.endFrame = snap.keyFrame = bookmarks->bookmarksArray[slot].snapshot.keyFrame;
 	char framenum[16];
 	strcat(snap.description, " ");
-	sprintf( framenum, "%i", snap.keyFrame);
+	snprintf( framenum, sizeof(framenum), "%i", snap.keyFrame);
 	strcat(snap.description, framenum);
 	if (taseditorConfig->enableHotChanges)
 		snap.inputlog.copyHotChanges(&getCurrentSnapshot().inputlog);
@@ -823,10 +823,10 @@ void HISTORY::registerRecording(int frameOfChange, uint32 joypadDifferenceBits)
 		}
 		// add upper and lower frame to description
 		strcat(snap->description, " ");
-		sprintf( framenum, "%i", snap->startFrame);
+		snprintf( framenum, sizeof(framenum), "%i", snap->startFrame);
 		strcat(snap->description, framenum);
 		strcat(snap->description, "-");
-		sprintf( framenum, "%i", snap->endFrame);
+		snprintf( framenum, sizeof(framenum), "%i", snap->endFrame);
 		strcat(snap->description, framenum);
 		// truncate history here
 		historyTotalItems = historyCursorPos+1;
@@ -860,7 +860,7 @@ void HISTORY::registerRecording(int frameOfChange, uint32 joypadDifferenceBits)
 		}
 		// add upper frame to description
 		strcat(snap.description, " ");
-		sprintf( framenum, "%i", frameOfChange);
+		snprintf( framenum, sizeof(framenum), "%i", frameOfChange);
 		strcat(snap.description, framenum);
 		// set hotchanges
 		if (taseditorConfig->enableHotChanges)
@@ -942,7 +942,7 @@ int HISTORY::registerLuaChanges(const char* name, int start, bool insertionOrDel
 		// add upper frame to description
 		char framenum[16];
 		strcat(snap.description, " ");
-		sprintf( framenum, "%i", first_changes);
+		snprintf( framenum, sizeof(framenum), "%i", first_changes);
 		strcat(snap.description, framenum);
 		// set hotchanges
 		if (taseditorConfig->enableHotChanges)
diff --git a/src/drivers/Qt/TasEditor/playback.cpp b/src/drivers/Qt/TasEditor/playback.cpp
index 8f5a9659..6d4ae6f2 100644
--- a/src/drivers/Qt/TasEditor/playback.cpp
+++ b/src/drivers/Qt/TasEditor/playback.cpp
@@ -447,7 +447,7 @@ void PLAYBACK::redrawMarkerData()
 		strcpy(new_text, upperMarkerText);
 	}
 	char num[16];
-	sprintf( num, "%i", displayedMarkerNumber);
+	snprintf( num, sizeof(num), "%i", displayedMarkerNumber);
 	strcat(new_text, num);
 	strcat(new_text, " ");
 	tasWin->upperMarkerLabel->setText( QObject::tr(new_text) );
diff --git a/src/drivers/Qt/TasEditor/selection.cpp b/src/drivers/Qt/TasEditor/selection.cpp
index 07434b45..fee386bb 100644
--- a/src/drivers/Qt/TasEditor/selection.cpp
+++ b/src/drivers/Qt/TasEditor/selection.cpp
@@ -193,7 +193,7 @@ void SELECTION::redrawMarkerData()
 		strcpy(new_text, lowerMarkerText);
 	}
 	char num[16];
-	sprintf( num, "%i", displayedMarkerNumber);
+	snprintf( num, sizeof(num), "%i", displayedMarkerNumber);
 	strcat(new_text, num);
 	strcat(new_text, " ");
 	tasWin->lowerMarkerLabel->setText( QObject::tr(new_text) );
diff --git a/src/drivers/Qt/TasEditor/splicer.cpp b/src/drivers/Qt/TasEditor/splicer.cpp
index c1e19ce3..a60d8e07 100644
--- a/src/drivers/Qt/TasEditor/splicer.cpp
+++ b/src/drivers/Qt/TasEditor/splicer.cpp
@@ -73,7 +73,7 @@ void SPLICER::update(void)
 			// rows
 			if (size > 1)
 			{
-				sprintf( num, "%i", size);
+				snprintf( num, sizeof(num), "%i", size);
 				strcat(new_text, num);
 				strcat(new_text, numTextRows);
 			}
@@ -85,7 +85,7 @@ void SPLICER::update(void)
 			int columns = NUM_JOYPAD_BUTTONS * joysticksPerFrame[getInputType(currMovieData)];	// in future the number of columns will depend on selected columns
 			if (columns > 1)
 			{
-				sprintf( num, "%i", columns);
+				snprintf( num, sizeof(num), "%i", columns);
 				strcat(new_text, num);
 				strcat(new_text, numTextColumns);
 			}
@@ -787,7 +787,7 @@ void SPLICER::redrawInfoAboutClipboard(void)
 		// rows
 		if (clipboardSelection.size() > 1)
 		{
-			sprintf( num, "%zi", clipboardSelection.size());
+			snprintf( num, sizeof(num), "%zi", clipboardSelection.size());
 			strcat(new_text, num);
 			strcat(new_text, numTextRows);
 		}
@@ -799,7 +799,7 @@ void SPLICER::redrawInfoAboutClipboard(void)
 		int columns = NUM_JOYPAD_BUTTONS * joysticksPerFrame[getInputType(currMovieData)];	// in future the number of columns will depend on selected columns
 		if (columns > 1)
 		{
-			sprintf( num, "%i", columns);
+			snprintf( num, sizeof(num), "%i", columns);
 			strcat(new_text, num);
 			strcat(new_text, numTextColumns);
 		}
diff --git a/src/drivers/Qt/TasEditor/taseditor_project.cpp b/src/drivers/Qt/TasEditor/taseditor_project.cpp
index 235f8986..80c486ec 100644
--- a/src/drivers/Qt/TasEditor/taseditor_project.cpp
+++ b/src/drivers/Qt/TasEditor/taseditor_project.cpp
@@ -279,10 +279,10 @@ bool TASEDITOR_PROJECT::load(const char* fullName)
 				message.assign("This project was saved using different version of TAS Editor!\n\n");
 				message.append("Original version: ");
 				char versionNum[16];
-				sprintf( versionNum, "%u", projectFileVersion);
+				snprintf( versionNum, sizeof(versionNum), "%u", projectFileVersion);
 				message.append(versionNum);
 				message.append("\nCurrent version: ");
-				sprintf( versionNum, "%i", PROJECT_FILE_CURRENT_VERSION);
+				snprintf( versionNum, sizeof(versionNum), "%i", PROJECT_FILE_CURRENT_VERSION);
 				message.append(versionNum);
 				message.append("\n\nClick Yes to try loading all data from the file (may crash).\n");
 				message.append("Click No to only load movie data.\n");